摘要:

Proceedings of the Society for Analytical Chemistry CONTENTS Proc. SOC. Analyt. Chem. Vol. 3 No. II Pages 167-178 SAC Conference I968 . . . . 167 Reports of Meetings . . . . 167 “Characterisation of Residues after Thermal Treatment” . . I69 “Particle-size Analysis” .. 172 Papers accepted for The Analyst 175 Obituary . . . . . . . . 176 Membership changes . . . . 177 Publications Received . . . . 177 Notices . . . . Inside Back Covet Forthcoming Meetings . . Back Cover November 1966 Vol. 3 No. I I November 1966 PROCEEDINGS OF THE SOCIETY FOR ANALYTICAL CHEMISTRY President of the Society A. A. Smales O.B.E. Hon. Secretary of the Society S. A. Price Hon. Treasurer of the Society D. T. Lewis C.B. Hon. Assistant Secretaries of the Society B. S. Cooper; D. W. Wilson Secretary Miss P. E. Hutchinson 14 BELGRAVE SQUARE LONDON S.W.1 Telephone BELgravia 3258 Editor 1. B. Attrill Proceedings is published by The Society for Analytical Chemistry and distributed to members and all subscribers to The Analyst without charge Single copies may be obtained direct from the Secretary The Society for Analytical Chemistry at the above address (NOT through Trade Agents) price 2s. 6d. post free. Remittances payable to “Society for Analytical Chemistry” MUST accompany orders THE SOCIETY FOR ANALYTICAL CHEMISTRY DR. PETR ZUMAN of J. Heyrovsky Institute of Polarography Czechoslovak Academy of Sciences Prague (at present at the Department of Chemistry University of Birmingham) will lecture on Organic Polarography in the Determination of Physical Constants on Wednesday December 7th 1966 at 7p.m. in the Department of Chemistry Imperial College London S.W.7

ISSN:0037-9697    

DOI:10.1039/SA96603FX035

出版商:RSC    

年代:1966

数据来源: RSC

摘要:

NOTICES Notices THE PHARMACEUTICAL SOCIETY OF GREAT BRITAIN MODERN SPECTROSCOPY AND CHEMICAL ANALYSIS A MEETING of the Pharmaceutical Society of Great Britain will be held at the Society’s House 17 Bloomsbury Square London W.C.2 on Thursday November 24th 1966 at 6 p.m. The Chair will be taken by Professor D. W. Mathieson B.Sc. Ph.D. F.R.I.C. Mr. R. F. Branch B.Sc. A.R.I.C. will present the following paper “Modern Spectroscopy and Chemical Analysis,” in which he describes the principles and area of application of some of the newer forms of spectroscopy e g . nuclear magnetic resonance electron spin resonance optical rotatory dispersion and circular dichroism. THE INSTITUTE OF PHYSICS AND THE PHYSICAL SOCIETY CONFERENCE ON TRANSPORT PROPERTIES OF SUPERCONDUCTORS A CONFERENCE on “The transport properties of superconductors” to be held on March 30th and 31st 1967 is being arranged by the Institute of Physics and the Physical Society at the University of Kent a t Canterbury.The conference will cover both experimental and theoretical aspects of the transport of electric charge heat and sound through superconductors. The emphasis will be on type-I1 superconductors although there will be some contributions on non-linear and quantum interference phenomena in type-I. The conference will comprise both invited reviews and contributed papers of 15 minutes’ length. Contributors should submit not later than February 17th 1967 three copies of a synopsis of about 200 words for considera- tion by the papers’ Committee. Synopses should be sent to the Conference Secretary Dr. G. Rickayzen The University Physics Laboratories Canterbury Kent.It is not intended to publish the proceedings of this conference. Residential accommodation will be available in one of the colleges on the University campus. Advanced registration for attendance at the conference will be necessary and further details and application forms will be available in December from the Meetings Officer The Institute of Physics and The Physical Society 47 Belgrave Square London S.W.l. The Organising Committee welcomes offers of contributions. Forthcoming Meetings-continued December Friday 9th MIDLANDS SECTION on “The Analysis of Water.” BIRMINGHAM “Cellar-waters Identification of their Origin,” by A. H. Coombes. “Analysis of Potable Water,” by S. S. Parker. The University Edgbaston Birmingham 4; 6.30 p.m.WESTERN SECTION jointly with the South Wales Section of the Royal Institute “Mass Spectrometry,” by R. I. Reed. University College Swansea; 5 p.m. 2.30 p.m. Visit to the laboratories of University College of Swansea. WESTERN SECTION jointly with the Cardiff and District Section of the Royal University College Cardiff; 7 p.m. Friday 9th SWANSEA of Chemistry. Friday 16th CARDIFF Institute of Chemistry on “Automatic Analysis.” November Tuesday 22nd LONDON Friday 25th EASTHAM Tuesday 29th LONDON Wednesday 30th LONDON Wednesday 30th LONDON December Thursday 1st GLASGOW Friday 2nd GLASGOW Friday 2nd CHESTER Tuesday 6th LONDON Wednesday 7th LONDON Thursday 8th LONDON Friday 9th LONDON THE SOCIETY FOR ANALYTICAL CHEMISTRY Forthcoming Meetings SPECIAL TECHNIQUES GROUP Annual General Meeting.“The Analysis of Paper Chromatograms by using Automatic Techniques Chemistry Lecture Theatre C Imperial College Imperial Institute Road NORTH OF ENGLAND SECTION jointly with the Carlett Park Scientific Society. “The Design of Reagents for Metal Analysis,’’ by L. S. Bark B.Sc. F.R.I.C. College of Further Education Carlett Park Eastham; 6.30 p.m. PARTICLE SIZE ANALYSIS GROUP Annual General Meeting followed by a “Collaborative Testing of Size Analysis Methods,” by C. G. Barlow B.Pharm. “The Pharmaceutical Society’s Panel on Particle-size Research,” by G. Smith “The Statistical Element in Micromeretics,” by G. Herdan M.Sc. Ph.D. LL.D. Physics Lecture Theatre Imperial College Prince Consort Road London MICROCHEMICAL METHODS GROUP London Discussion Meeting. Discussion on “Complexometric Methods of Analysis.” “The Feathers,” Tudor Street London E.C.4; 6.30 p.m.THIN-LAYER CHROMATOGRAPHY GROUP Annual General Meeting. Sir John Cass College Jewry Street London E.C.3; 2 p.m. and a Digital Computer,” by A. A. Boulton B.Sc. Ph.D. London S.W.7; 7 p.m. Meeting on “Collaborative Testing.” M.P.S. and B. Scarlett M.Sc. B.Sc. F.P.S. S.W.7; 6.30 p.m. SCOTTISH SECTION Ramsay Dinner. Central Hotel Glasgow; 7 p.m. for 7.30 p.m. SCOTTISH SECTION jointly with the Local Sections of the Chemical Society the Royal Institute of Chemistry and the Society of Chemical Industry. Glasgow. NORTH OF ENGLAND SECTION. “Analyst You Must Apply Statistics,” by A. G. Baker B.Sc. F.R.S.S. and K. L. Simpson B.Sc. Chester; 6.15 p.m. ATOMIC-ABSORPTION SPECTROSCOPY GROUP Annual General Meeting. Discussion on “Resonance Detectors for Atomic-absorption Work,” to be London; 6.30 p.m. SOCIETY. “Organic Polarography in the Determination of Physical Constants,” by Imperial College South Kensington London S.W.7; 7 p.m. BIOLOGICAL METHODS GROUP Annual General Meeting. Discussion on “The Principles of Immunoassay,” to be opened by K. W. “The Feathers,” Tudor Street London E.C.4; 6.30 p.m. MICROCHEMICAL METHODS GROUP Annual General Meeting followed by the Meeting Room of the Royal Society Burlington House London W. 1 ; [continued inside back covev opened by M. D. Amos. Dr. P. Zuman. Taylor Ph.D. M.A. M.B. B.Chir. retiring Chairman’s Address. 6.45 p.m. Printed by W Heffer & Sons Ltd Cambridge England

ISSN:0037-9697    

DOI:10.1039/SA96603BX037

出版商:RSC    

年代:1966

数据来源: RSC

摘要:

November I966 Vol. 3 No. 11 Reports of Meetings NORTH OF ENGLAND SECTION AN Ordinary Meeting of the Section was held at 2.30 p.m. on Saturday October lst 1966 at the Lecture Theatre City Laboratories Mount Pleasant Liverpool. The Chair was taken by the Chairman of the Section Mr. J. F. Clark M.Sc. A.R.C.S. D.I.C. F.R.I.C. F.R.S.H. The following paper was presented and discussed “Organochlorine Pesticide Residue Analysis,’’ by J. O’G. Tatton MSc. F.R.I.C. SCOTTISH SECTION AN Ordinary Meeting of the Section was held at 6 p.m. on Friday October 28th 1966 in Room 24 University of Strathclyde George Street Glasgow. The Chair was taken by the Chairman of the Section Mr. J. K. McLellan M.A. B.Sc. F.R.I.C. The following paper was presented and discussed “The Detection and Identification of Dope,” by M.S. Moss M.Sc. F.R.I.C. MIDLANDS SECTION AN Ordinary Meeting of the Section was held at 2.15 p.m. on Thursday October 20th 1966 in the Lecture Theatre Civic College Ipswich. The Chair was taken by the Vice-chairman of the Section Mr. H. E. Brookes B.Sc. F.R.I.C. 168 REPORTS OF MEETINGS [Proc. SOC. Analyt. Chew. The subject of the meeting was “Aspects of Trace Analysis” and the following papers were presented and discussed “The Determination of Some Organophosphorus Pesticides in Biological Material,” by J. S. Leahy M.A. ; “The Determination of Trace Volatiles in Whisky by Gas Chromatography,” by C. Macfarlane A.C.T.(Birm.) A.R.I.C. ; “Some Aspects of the Determination of Diffusion Profiles in Silicon Transistor Structures,” by A. R. Dale A.R.I.C. A JOINT Meeting of the Midlands Section with the Polarographic Society was held at 6.30 p.m.on Tuesday October 25th 1966 in the Spread Eagle Hotel Goldsmith Street Nottingham. The Chair was taken by the Chairman of the Midlands Section Mr. W. T. Elwell F.R.I.C. A discussion on “Organic Polarography” was opened by G. F. Reynolds MSc. Ph.D. M.R.S.H. F.R.I.C. Mrs. B. Lamb B.Sc. F.R.I.C. and L. H. Ruddle B.Sc. A.R.I.C. NORTH EAST SECTION A SOCIAL Meeting of the Section was held at 6.30 p.m. on Thursday October 20th 1966 at the County Hall Durham. The Chair was taken by the Vice-chairman of the Section Mr. F. C. Shenton F.R.I.C. A.R.T.C.S. The meeting took the form of an informal dinner followed by a short lecture on “Cos- metics,” by A. S. Beidas B.Sc. F.R.I.C. and a practical demonstration on the use of cosmetics.MICROCHEMICAL METHODS and RADIOCHEMICAL METHODS GROUPS A JOINT Meeting of the Microchemical Methods and Radiochemical Methods Groups was held on Friday and Saturday September 16th and 17th 1966 at the University of Kent at Canterbury. At the scientific session on September 16th the Chair was taken by the Chairman of the Microchemical Methods Group Mr. R. Goulden F.R.I.C. and the following papers were presented and discussed “Radiochemical Methods,” by Professor G. R. Martin A.R.C.S. BSc. F.R.I.C. ; “Micro-determinations by Radioactive Isotope Dilution Analysis,” by T. T. Gorsuch BSc. Ph.D. A.R.I.C. ; “Trace Element Determination by Radioactivation Analysis,” by D. Gibbons Ph.D. A.R.I.C. At the afternoon session on September 17th the Chair was taken by the Chairman of the Radiochemical Methods Group Mr.D. A. Lambie B.Sc. F.R.I.C. and the following papers were presented and discussed “Liquid Scintillation Counting,” by F. H. Kendall B.Sc. Ph.D. F.R.I.C. and D. R. Pollard B.Sc. Ph.D. A.R.I.C.; “Radio- chemical Studies of Pesticide Metabolism in Crops and Soils,” by A. N. Wright M.A. Ph.D. ; “Some Uses of Labelled Compounds in Industrial Research,” by J. Whiston B.Sc. Ph.D. At the evening session the Chair was taken by Mr. R. Goulden F.R.I.C. and a discussion on “Working Methods in Radiochemical Microanalysis ” was introduced by D. A. Lambie B.Sc. F.R.I.C. The meeting included visits to the Woodstock Agricultural Research Centre Shell Research Ltd. Sittingbourne and Bowater’s Paper Mill Kemsley and a tour of the University of Kent. THE fifty-fifth London Discussion Meeting of the Group was held at 6.30 p.m.on Wednesday October 19th 1966 at “The Feathers,” Tudor Street London E.C.4. The Chair was taken by the Vice-chairman of the Group Mr. T. R. F. W. Fennell B.A. A discussion on “The Determination of Zinc Cadmium and Lead” was opened by R. E. Coulson F. R. I .C. BIOLOGICAL METHODS GROUP AN Ordinary Meeting of the Group was held at 7 p.m. on Thursday October 27th 1966 in the Meeting Room of the Pharmaceutical Society 17 Bloomsbury Square London W.C.l. The Chair was taken by the Chairman of the Group Dr. M. W. Parkes. The following paper was presented and discussed “The Use of Enzymes in Biochemical Analysis,” by I. D. Fleming Ph.D. A.R.I.C. RADIOCHEMICAL METHODS GROUP THE Inaugural Meeting of the Group was held at 9.45 a.m. on Friday September 16th 1966 at the University of Kent at Canterbury.Mr. C. Whalley B.Sc. F.R.I.C. Vice-president of the Society made the introduction. The following were confirmed as Officers and Committee Members for the forthcoming year Chairman-Mr. D. A. Lambie. Vice-Chairman-Dr. H. J. Cluley. Honorary Secretary and Treaswer-Dr. D. I. Coomber Laboratory of the Government The subject of the meeting was “Radiochemical Methods in Microanalysis.” November 19661 CHARACTERISATION OF RESIDUES AFTER THERMAL TREATMENT 169 Chemist Cornwall House Stamford Street London S.E. 1. Members of Committee- Dr. H. J. M. Bowen Dr. s. J. Lyle and Dr. J. Whiston. Dr. F. J. Bryant and Dr. T. T. Gorsuch were appointed as Honorary Auditors. The Inaugural Meeting was followed by the Joint Meeting of the Group with the Micro- chemical Methods Group reported above.Characterisation of Residues after Thermal Treatment The following are summaries of papers presented at a Meeting of the Thermal Analysis Group held on April 21st and 22nd 1966 and reported in the June issue of Proceedings (p. 95). Modern Aspects of Dehydration and Decomposition of Mineral Silicates BY A. A. HODGSON (Cape Asbestos Fibres Ltd. Barking Essex) DR. HODGSON said that many clay minerals calcium silicate hydrates and amphiboles dehydroxylated and formed new minerals topotactically i.e. each single crystal of the starting material gave something approaching a single crystal of product which was formed in a definite and reproducible orientation. An inhomogeneous mechanism for these reactions was derived by Professor H.F. W. Taylor (CZay Miner. Bull. 1962 5 No. 28 45) who suggested that the oxygen frame-work in certain parts of the lattice of the crystal remained relatively unchanged during decomposition while other parts of the structure were completely destroyed. Those parts that were destroyed formed donor regions giving up cations which migrated to the undestroyed part of the molecule to link with the existing framework and form a new product. This part of the molecule was an acceptor region. Its oxygen frame-work remained virtually stable but it gave up protons which migrated to donor regions where they united with oxygen atoms to form water. Typical examples of these reactions were the decomposition of brucite serpentine and the amphiboles tremolite amosite and crocidolite. However both amosite and crocidolite produced some- what different reactions although based on cation and proton migration depending upon whether the surrounding atmosphere was inert or oxidising.The importance of these theories in the interpretation of differential thermal analysis and thermogravimetric analysis results lay in what was meant by the terms “dehydroxy- lation” and “decomposition.” Dehydroxylation was not necessarily the coupling of adjacent hydroxyl groups to form water. Once it was recognised that proton migration could take place the explanation of alternative mechanisms for the dehydration of a substance could be made. For example when crocidolite was heated in oxygen it gave up its combined water at a much lower temperature than in inert atmospheres. It did this by migration of protons from hydroxyl groups to crystal surfaces where they could react with atmospheric oxygen.Amosite on the other hand when heated in an inert atmosphere gave up part of its elements of water as free hydrogen. Obviously an understanding of such processes was essential wherever thermogravimetric analysis results were used for purposes of chemical analyses. Similarly it might not be possible to write down the decomposition of a complex silicate in terms of a single line equation to fit the interpretation of a differential thermal analysis curve. The diagrammatic expression of the decomposition showing donor and acceptor regions and the possible production of intermediate unstable or ill crystallised phases helped considerably in confirming the reaction as seen in the differential thermal analysis curve. Physical and Chemical Methods of Characterising Silicas BY J. A. HOCKEY (The University of Manchester Institute of Scie%ce and Technology) DR. HOCKEY began by outlining some of the salient surface properties of hydrous oxides in general and of silicas in particular. It was pointed out that the surface physical and chemical properties of the latter were governed to a large extent by the hydroxylation of its surface.

ISSN:0037-9697    

DOI:10.1039/SA966030167b

出版商:RSC    

年代:1966

数据来源: RSC

摘要:

November 19661 CHARACTERISATION OF RESIDUES AFTER THERMAL TREATMENT 169 Characterisation of Residues after Thermal Treatment The following are summaries of papers presented at a Meeting of the Thermal Analysis Group held on April 21st and 22nd 1966 and reported in the June issue of Proceedings (p. 95). Modern Aspects of Dehydration and Decomposition of Mineral Silicates BY A. A. HODGSON (Cape Asbestos Fibres Ltd. Barking Essex) DR. HODGSON said that many clay minerals calcium silicate hydrates and amphiboles dehydroxylated and formed new minerals topotactically i.e. each single crystal of the starting material gave something approaching a single crystal of product which was formed in a definite and reproducible orientation. An inhomogeneous mechanism for these reactions was derived by Professor H.F. W. Taylor (CZay Miner. Bull. 1962 5 No. 28 45) who suggested that the oxygen frame-work in certain parts of the lattice of the crystal remained relatively unchanged during decomposition while other parts of the structure were completely destroyed. Those parts that were destroyed formed donor regions giving up cations which migrated to the undestroyed part of the molecule to link with the existing framework and form a new product. This part of the molecule was an acceptor region. Its oxygen frame-work remained virtually stable but it gave up protons which migrated to donor regions where they united with oxygen atoms to form water. Typical examples of these reactions were the decomposition of brucite serpentine and the amphiboles tremolite amosite and crocidolite. However both amosite and crocidolite produced some- what different reactions although based on cation and proton migration depending upon whether the surrounding atmosphere was inert or oxidising.The importance of these theories in the interpretation of differential thermal analysis and thermogravimetric analysis results lay in what was meant by the terms “dehydroxy- lation” and “decomposition.” Dehydroxylation was not necessarily the coupling of adjacent hydroxyl groups to form water. Once it was recognised that proton migration could take place the explanation of alternative mechanisms for the dehydration of a substance could be made. For example when crocidolite was heated in oxygen it gave up its combined water at a much lower temperature than in inert atmospheres. It did this by migration of protons from hydroxyl groups to crystal surfaces where they could react with atmospheric oxygen.Amosite on the other hand when heated in an inert atmosphere gave up part of its elements of water as free hydrogen. Obviously an understanding of such processes was essential wherever thermogravimetric analysis results were used for purposes of chemical analyses. Similarly it might not be possible to write down the decomposition of a complex silicate in terms of a single line equation to fit the interpretation of a differential thermal analysis curve. The diagrammatic expression of the decomposition showing donor and acceptor regions and the possible production of intermediate unstable or ill crystallised phases helped considerably in confirming the reaction as seen in the differential thermal analysis curve.Physical and Chemical Methods of Characterising Silicas BY J. A. HOCKEY (The University of Manchester Institute of Scie%ce and Technology) DR. HOCKEY began by outlining some of the salient surface properties of hydrous oxides in general and of silicas in particular. It was pointed out that the surface physical and chemical properties of the latter were governed to a large extent by the hydroxylation of its surface. 170 CHARACTERISATION OF RESIDUES AFTER THERMAL TREATMENT [Proc. SOC. Analyt. Chem. At the present time the surface hydroxyls of silicas were thought to exist largely in one of two configurations ; either as single isolated groups or as mutually hydrogen-bonded pairs. The samples studied at Manchester had all been completely hydroxylated silicas and could be divided into three broad categories (i) those that possessed only single surface hydroxyls; (ii) those with both single and interacting groups; and (iii) those with a significant concentration of surface micropores of molecular dimensions as well as both types of surface hydroxyls.Thermogravimetric studies had shown that samples of types (ii) and (iii) were de- hydroxylated more readily at temperatures below about 300” to 350” C than were type (i) samples. This was to be expected if one considered that the initial surface dehydroxylation corresponded to condensation of the closely adjacent interacting groups while the single species were only eliminated at higher temperatures. Differential thermal analyses had also yielded useful information about the surface dehydroxylation process although generally an unambiguous interpretation of the results obtained with materials of types (ii) and (iii) might not always be possible because of the imperfect crystallinity of the bulk solid phase.The lattice of such amorphous or “pseudo- crystalline” solids was usually relaxed or annealed into a more stable configuration by heating. This could result in enthalpy changes being observed that were due to bulk as well as surface processes. Fortunately other studies had already shown that this annealing process did not occur with silicas at temperatures below about 450” C. The results obtained from the differential thermal analyses had been processed in such a way that the data finally reflected enthalpy changes corresponding only to surface processes.This had been achieved by comparing the analyses of all the samples studied with that obtained from a reference sample of an annealed fully dehydroxylated Aerosil. So the results described were the “relative” differential thermal analyses of the hydroxylated specimens. On heating in air samples of types (i) and (ii) showed a “relative” endothermic process up to about 120” C. This was thought to correspond to the removal of adsorbed molecular water. Samples of type (iii) showed similar “relative” endotherms up to about 200” C. Solids of this type were known from spectroscopic studies to retain molecular water more strongly than non-microporous materials. On further heating up to about 350” C samples of types (ii) and (iii) exhibited a “relative” exothermic process that occurred over the tem- perature range at which the interacting hydroxyls were being eliminated from the surface.One interpretation of this exotherm was that the adjacent groups were present in the annealed solids because of the incomplete polycondensation process by which the silica particles were initially formed from “ortho-silicic acid.” It might therefore be expected that the completion of this condensation process would be exothermic if the current theories concerning the surface structure of silicas were correct. Samples of type (i) which possessed no interacting hydroxyls showed no such “relative” exotherm over this temperature range. In conclusion Dr. Hockey summarised his results by pointing out that although thermal analysis had already proved to be of great use as a tool for elucidating oxide surface structures there were some difficulties inherent in the technique.The most important of these would seem to be that the samples under study required a high specific surface area (i.e. a high surface-to-bulk ratio). Unfortunately these requirements would occasionally lead to the pseudo-crystallinity mentioned earlier with its concomitant interpretative difficulties. Dr. Hockey thanked Mr. J. A. G. Taylor for the use of his differential thermal analysis results. The Differential Thermal Analysis of Edible Fats BY D. P. J. MORAN ( Unilevev Reseavch Labovatovy The Frythe Welwyn Hevts.) DR. MORAN described some of the differential thermal analysis work carried out by his company in recent years in the field of edible fats. The melting range involved was usually about -60” to +90” C.The thermal properties of fats were governed by those of their component glycerides which generally constituted over 98 per cent. of the total composition. In 1958 Dr. Moran and his colleagues published work concerning the analysis of 7 triglycerides which clarified in some instances the confused position regarding the polymorphism of these substances. It was found that for the glyceride, November 19661 CHARACTERISATION OF RESIDUES AFTER THERMAL TREATMENT 171 2-oleo palmito stearin melting-points found by differential thermal analysis were somewhat lower than those found by other means (melting tube methods) although X-ray results showed good correlation with respect to polymorphism. For the isomer 2-palmito oleo stearin differential thermal analysis gave no a melt-point although other methods did.However a solid-phase transformation was noted about 15" C below the anticipated ct melt-point. For the isomer 2-stearo oleo palmitin an additional polymorphic phase was noted at 30" C that was not detectable by the melting tube technique. It was essential in the work to use corrob- orating evidence to differential thermal analysis regarding polymorphic changes particularly X-ray or even infrared techniques. A further example of solid - solid transformation was noted with the glyceride 1-stearo diolein (-8" C) and cholesterol (40" C). When used in phase studies the suspected peritectic melting-point in the system 2-oleo distearin - 1-stearo diolein was confirmed. The partial solubilities of glycerides with widely different melting- points in each other was demonstrated with triolein 2-oleoyl dipalmitin and tripalmitin.With tristearin as a reference the heats of fusion of several glycerides mixtures of glycerides and natural fats were determined. These studies were useful in manufacturing processes involving heat transfer. Dr. Moran emphasised the importance of thermal pre-treatment in order to obtain repro- ducible results. Two methods were particularly useful one involved cooling the sample un- melted after introduction whilst the other entailed cooling a melted sample systematically. Most liquid oils showed two solid modifications. Oils (such as fish) which had a more compli- cated glyceride structure showed more involved differential thermal analysis curves which varied with the origin of the sample. The technique could be used to analyse certain products for the constituent oils.The area of the differential thermal analysis curve showed a linear relationship with the dilatation of fats and might be used to corroborate such evidence. The technique was useful for demonstrating the instability of certain solid solutions in products especially on long term storage which could lead to poor texture. It might be possible t o replace the standard Shukoff cooling-curve method for monitoring the quality of cocoa butters by differential thermal analysis. Further applications might be forthcoming in the field of fat technology particularly for following hydrogenation and fractionation processes and for determining the properties of emulsifiers. A Method of Thermal Analysis by Measurement of the Electrical Conductivity of Polymers during Carbonisation BY M.I. POPE (Portsmouth College of Technology Povtsmouth Hunts.) DR. POPE said that in conventional methods of thermal analysis a sample was heated at a constant rate of temperature rise in a controlled atmosphere. The weight loss or rate of weight loss of the sample (in thermogravimetric analysis) or its temperature relative to that of an inert reference material (differential thermal analysis) was then plotted against temperature. The resulting curve was characteristic of the substance being studied and could be used for its identification. In addition information concerning the mechanism of the decomposition reactions could be deduced from the various peaks observed. Dr. Pope had now shown that for organic polymeric materials if the rate of change of electrical conductivity was plotted against temperature the curve obtained could also be used to identify the starting material and help to determine the course of the carbonisation process.Measurements were made on compacted powders by using a vibrating reed electrometer amplifier with the potential gradient across the sample not exceeding 1.0 volt d.c. per cm. A heating rate of 3" C per minute was maintained up to 1000" C and a flow of oxygen-free nitrogen was passed over the sample. With a hypothetical intrinsic organic semiconductor which did not decompose on heating the rate of increase in conductivity with temperature would fall progressively as the temperature was increased in accordance with the equation- (T = A exp (-E/2kT) where (T is the electrical conductivity at absolute temperature T; k Boltzmann's constant ; E the energy of activation for semiconduction; and A a constant.172 PARTICLE-SIZE ANALYSIS [Proc. SOC. Analyt. Chem. Any maxima observed in a plot of log (T against temperature must therefore be caused by one or more of the following factors- (i) decomposition of the solid could result in a new mechanism of conduction becoming (ii) evolution of a decomposition product having a significantly higher conductivity (iii) sintering or partial melting bringing about an improvement in electrical contact These factors would all cause the rate of increase in conductivity to be greater than that expected for the hypothetical semiconductor. In addition a fourth factor had to be con- sidered- (iv) evolution of non-conducting decomposition products might disrupt the grain structure of the solid causing a fall in the area of inter-particle contacts; or lead to the formation of a non-conducting film over the surface of the particles.Factor (iv) would cause the rate of increase in conductivity to be less than expected. To illustrate the potentialities of this technique Dr. Pope discussed in detail the results obtained with 2 polymeric materials differing markedly in structure; one was a bituminous coal of rank number 401 and the other was unplasticised poly(viny1 chloride). Coals of this rank consisted basically of small aromatic clusters containing 2 or 3 fused benzene rings which were joined by short aliphatic bridges containing 2 or more methylene groups. The effects of methylating dehydrogenating and brominating the coal were reflected in changes in the rate of increase of conductivity- temperature curves; it proved possible to interpret these changes in terms of the modifications to the structure of the coal which were known to have occurred. Similarly the curve obtained with poly(viny1 chloride) was correlated with the mechanism of thermal decomposition which was investigated in detail by a number of workers. In conclusion Dr. Pope mentioned that further investigations as yet unpublished suggested that this method might prove useful in the study of inorganic compounds. It had been proposed that an appropriate name for this new technique might be Electro Thermal Analysis (E.T.A.). possible ; than that of the residue; and between the particles of the solid.

ISSN:0037-9697    

DOI:10.1039/SA9660300169

出版商:RSC    

年代:1966

数据来源: RSC

摘要:

172 PARTICLE-SIZE ANALYSIS [Proc. SOC. Analyt. Chem. Particle-size Analysis The following are summaries of papers presented at the Joint Meeting of the Midlands Section with the Particle Size Analysis Group held on June Sth 1966 and reported in the September issue of Proceedings (p. 139). The Perkin-Elmer - Shell Sorptometer By G. A. LOMBARD (Geigy ( U. K.) Ltd. Pigments Division Simonsway Manchester 22) MR. LOMBARD said that the Sorptometer was a commercial instrument designed to measure the surface area of solids by dynamic adsorption. The principle of the method was to pass a known mixture of adsorbent (nitrogen) and carrier gas (helium) over the sample and to detect changes in concentration of nitrogen in the helium due to adsorption or desorption by means of a thermal conductivity bridge with an amplified output to a potentiometric recorder.The areas of the peaks produced were proportional to the amount of gas adsorbed at the particular partial pressure. Four models had appeared to date and measurements on a model 212B instrument have been made of a range of organic pigments with surface areas in the range 7 to 100 sq. m per g. Results showed that the standard of accuracy and reproducibility was adequate for most purposes and calculation of relative standard deviations gave values between 1.1 and 3.6 per cent. which were of comparable order to those published in the literature for the commercial instrument. Satisfactory agreement was found with results obtained from November 19661 PARTICLE-SIZE ANALYSIS 173 measurements on a conventional volumetric static apparatus.It was felt that the use of elevated temperatures for pre-treatment of the sample before measurement by de-gassing on a high vacuum line might well be best avoided as a general feature for organic pigments and that helium streaming was likely to be a lengthy procedure. De-gassing on a high vacuum line at room temperature for 2 hours seemed to be suitable and for this operation it was felt that the important point was to reach some satisfactory final pressure. Five-point measurements took 2 to 3 hours after the instrument was ready for the first adsorption; three-point measurements 14 to 2 hours; and single-point measurements 25 to 30 minutes (all times were exclusive of calculation). Peak areas could be measured either by a planimeter or by an integrator such as a Kent Chromolog unit in which event the surface area value could be obtained from the results of three-point measurement within 30 minutes of completing a run.With such a unit it was possible to make 2 five-point measurements in a normal working day or 3 to 4 three-point measurements the latter depending on the time taken for adsorption and desorption. In the absence of an integrator the method was probably only slightly quicker than the static method but the great advantage was that adsorption was not measured under high vacuum. The instrument was constructed from metal components fragile glassware being completely absent except for a sample tube and flow-meter. It was therefore much more robust and the method certainly more convenient and more suited to routine or semi-routine determination.Operators needed to be only of average dexterity and to take normal care to use the instrument satisfactorily. It had to be remembered that the @/Po range could not be covered completely and this might limit the use of the Sorptometer in drawing a full isotherm. The Numinco - Orr Surface Area - Pore Volume Analyser By A. G. COTTRELL (Imfievial Chemical Industries Ltd. Mond Division Runcorn Heath Cheshire) MR. COTTRELL described the Numinco - Orr surface area - pore volume analyser that was designed by Professor C. Orr in conjunction with the Numec Instrument Company of Pennsylvania. The Numinco instrument was an instrumental version of the well known glass BET apparatus. It consisted essentially of- (i) a seven-valve stainless-steel manifold through which three sample holders were (ii) an evacuation system consisting of a cold trap a diffusion pump and a mechanical (iii) a sensitive Bowden tube type pressure indicator; (iv) two alternative extra volume bulbs which could be included in the manifold when (v) a thermistor low pressure detector; and (vi) inlets for the gases helium and adsorbate which could be nitrogen krypton argon The thermistor pressure gauge was used to measure both the de-gassing pressure during evacuation and the adsorption pressure of krypton during a surface area test.The system was shifted from one purpose to the other by setting a switch on either “DE-GAS” or “TEST.” A re-settable timer was incorporated into this instrument to indicate how long a sample had been exposed to a particular pressure during de-gassing. Another auxiliary component of the apparatus was a thermistor thermometer ; this operated in two ranges-one to indicate the temperature of the manifold system (22” to 37” C) the other to take the temperature of the liquid nitrogen used to cool the samples for the actual tests.Other components were heating mantles which fitted over the sample flasks so that the samples could be heated to any required temperature during de-gassing. The tempera- ture of any sample could be checked by plugging in a thermocouple lead attached to each heating mantle. interconnected ; pump ; extra adsorbate was required for high surface areas; or other gases. 174 PARTICLE-SIZE ANALYSIS [Proc. SOC. Analyt. Chew. The steps carried out for the determination of a surface area were similar to those on a normal BET apparatus except that the time-consuming pressure - volume manipulations had been considerably simplified.The de-gassing period depended on the individual sample 2 hours at 250” C being normally sufficient on a thermally stable sample. After de-gassing the “dead space” or unoccupied sample volume was measured by using helium. The nitrogen adsorption stage differed slightly from that on a glass BET apparatus in that it was advisable with the Numinco to use a constant nitrogen pressure in the manifold for each introduction and continue until the final pressure was at least 100 mm of mercury; with the BET apparatus on the other hand nitrogen was adsorbed at a series of increased pressures. The calculation of the results for any type of BET surface area was time consuming but these had been simplified to some extent by the use of calculation sheets.The final two where P8 = the second condition columns on these sheets gave values for-and pressure P = the saturation pressure i.e. the vapour pressure of the liquid nitrogen P used as the coolant V = the volume of gas adsorbed and X = -. PS could be fitted by an equation of the form- p2 P V(1 - X ) An arithmetic plot of the last two columns gave the normal BET isotherm curve which where Vm is the volume of gas required to form a mono-layer on the surface of the tested solid and C is a constant. The surface area was then calculated from the slope and intercept in the usual way. Mr. Cottrell described the use of a computer programme for obtaining the results. The programme was based on the calculation sheets and each column of values printed out in full by the computer so that the graph could be plotted if required and any unusual results investigated.By using a 15-sample de-gassing unit that was separate from the analyser about 8 BET determinations could be made in one day. The Strohlein Areameter By D. P. BRYANT (Welwyn Hall Research Association Welwyn Hevtfordshire) DR. BRYANT reviewed the Strohlein Areameter. This equipment which was constructed mainly in plastic with O-ring seals throughout was manufactured by Strohlein & Co. of Diisseldorf to a design by Haul and Dumbgen. Basically it consisted of two bulbs; one containing the sample under test was connected to a differential manometer. The operation of the apparatus depended on the low-temperature nitrogen adsorption method of Brunauer Emmett and Teller (BET) and normally only one point on the isotherm was determined.The bulb containing the powder under examination was outgassed by purging with nitrogen at elevated temperature in a separate unit. The dissociation of the outgassing and adsorption processes led to a high rate of measurement ; 16 samples per day was suggested as a possibility depending on the nature of the samples. After outgassing the sample bulb was transferred to the adsorption apparatus which was then filled with nitrogen at room tempera- ture. On cooling the sample and reference bulbs in liquid nitrogen the gas pressure in the apparatus fell to the BET region and the differential pressure on the manometer was recorded. This technique avoided the “dead-space” correction and provided increased sensitivity com- pared with conventional BET equipment.It was stated that the normal BET equation could be used to evaluate the results from a knowledge of the atmospheric and the measured differential pressures the relevant appara- tus constants being given in the instruction manual. A simplified form of calculation associ- ated with a nomogram by Gall minimised the computation required. However the simplifications introduced into the basic equation imposed certain restrictions. The principal restriction was that the preferred sample weight was that which would give a differential pressure of 150 mm which is equivalent to a sample area of 25 sq. m. For samples of low November 19661 PAPERS ACCEPTED FOR PUBLICATION 175 specific surface the volume of material present necessitated a further correction that could be calculated from the nomogram.This correction was small at the preferred sample weight and errors due to the use of incorrect densities were minimised. The lecturer reported that results obtained by this simplified method were somewhat lower than those obtained by conventional BET methods and an arbitrary correction factor of 1.05 had been included in the calculations by the manufacturer. While this was satisfactory for a wide range of materials it might be preferable to calculate afresh the correction factor in instances when a single material was being measured for routine control purposes provided that the samples were of approximately the same specific surface. Some results illustrating the effect of sample weight on measured surface area of titanium dioxide were shown to follow the expected trend due to pressure errors of the differential manometer.However the scatter of results at this preferred pressure suggested that the deviations at maximum and minimum sample areas (50 and 7 sq. m respectively) were within the over-all range of experimental error. The speaker concluded with some suggestions for other adsorbate - coolant combinations. Papers Accepted for Publication in The Analyst THE following papers have been accepted for publication in The Analyst and are expected to appear in the near future. “The Determination of Boron in Fertilisers,” by H. Borland I. A. Brownlie and P. T. Godden. “A Rapid Infrared Spectrophotometric Method for the Analyses of pp’-DDT in Formulations of Technical DDT,” by D. J. Hamilton and T.J. Beckman. “Inorganic Thin-layer Chromatography Part 11. Chromatography of Some First Row Transition Metals on Thin-layers of Substrates Impregnated with Tributyl Phosphate (TBP),” by L. S. Bark G. Duncan and J. T. Graham. “A Simple Low Cost Gas Chromatograph for the Determination of Fatty Acids,” by B. H. Priscott. “The Determination of Trace Amounts of Chloride by Rapid Evolution - Conductimetric Procedure,” by B. H. Priscott. “Separation of Mustard Gas and Hydroxy Analogues by Thin-layer Chromatography,” by F. G. Stanford. “Spectrophotometric Determination of Aluminium in Soil Extracts with Xylenol Orange,” by D. T. Pritchard. “The Amperometric Titration of Submillinormal Concentrations of Hexacyanoferrate (111) with Mercury (I) Perchlorate,” by J. T. Stock and R. J. Merrer.“A Review of Techniques in Gas Chromatography Part 1 Choice of Solid Supports,’’ by E. A. Walker. “The Determination of Calcium in Biological Samples by X-ray Fluorescence,” by K. P. Champion and R. N. Whittem. “An X-ray Spectrographic Method for Determining Barium,’’ by E. R. McCartney and S. A. Prokopovich. “Analytical Application of a O-5-MeV Cockcroft - Walton Set. Based on the Measurement of Prompt y-Radiation,” by T. B. Pierce P. F. Peck and D. R. A. Cuff. “The Determination of Dicumyl Peroxide in Polystyrene Materials,” by J. A. Brammer S. Frost and V. W. Reid. “The Component of Commercial Titan Yellow Most Reactive towards Magnesium Its Isolation and Use in Determining Magnesium in Silicate Minerals,” by H. G. C. King and G. Pruden. “The Collection of Uranium(V1) on Cellulose Phosphate,” by T. Bruce and R. W. Ashley. “A Rapid Method for Determining Nitrogen in Uranium Nitrides,” by B. L. Taylor “The Determination of Warfarin in Animal Relicta,” by F. B. Fishwick and A. Taylor. and B. S. Perrett.

ISSN:0037-9697    

DOI:10.1039/SA9660300172

出版商:RSC    

年代:1966

数据来源: RSC

摘要:

176 OBITUARY [Proc. SOC. Analyt. Chem. Obituary HERBERT NEWTON WILSON HERBERT NEWTON WILSON died on October Eth 1966 at the age of 66. It was known that he had not enjoyed the best of health since his retirement in July 1962 but his sudden death came as a profound shock to all who knew him He leaves a widow and one married daughter. H. N. Wilson was born in Darlington and received his early education at the Darlington Queen Elizabeth Grammar School. His first appointment was with Saddler and Co. Ltd. Middlesbrough in 1916 and in 1927 he joined 1.C.1.’~ Research Department Analytical Laboratories at Billingham where he spent the remainder of his working life. The Billingham Laboratories have always been early users of new analytical techniques and this reflected Wilson’s far-seeing policy.Indeed it was largely due to his efforts that the Billingham Laboratories became recognised nationally and internationally not only for a high standard of analytical work but for the large number of staff who ultimately reached senior positions in the scientific field. Wilson’s published work covers a wide range of analytical topics dating back to the 1930’s when he published papers on such diverse topics as the determination of selenium in sulphur and -OH groups by the pyridine - acetic anhydride method. Later publications included the determination of amines trace elements in phenol uranium in urine arsenic in glass nitromethane in air; but his name is more likely to be perpetuated by its association with the volumetric determination of silicate and phosphate. He was also joint editor of both editions of “Chemical Analysis-The Working Tools.” “H.N.,” as he was known to all who knew him personally was the first Royal Institute of Chemistry examiner for the Fellowship in General Analytical Chemistry from 1943 to 1949 and served on the Council of that body from 1945 to 1946 and from 1949 to 1952.Within the Society for Analytical Chemistry-he was a member for over 30 years-he served on Council from 1947 to 1948 and is perhaps best known for his Chairmanship of the joint S.A.C./A.B.C.M. Committee on Trade Effluent Analysis and his association with the mono- graph of approved methods that was subsequently speedily published. For some years before 1962 he was a member of the Fertiliser Manufacturers’ Association Analytical Committee and served on the Scientific Sub-committee of the Fertilisers and Feeding Stuffs Act 1926 Standing Advisory Committee of the Ministry of Agriculture Fisheries and Food.“H.N.” achieved many other objectives in his lifetime-he was for example an accom- plished pianist and organist and attained a high degree of competence in the field of water- colour painting; but in his professional duties he was never a man to sit back and claim that he had done his stint. He had a love of hard work a quality that could not fail to be inculcated on those of us who benefited from his wide experience professional and otherwise. So far as he was concerned a spade was known by no other name and hence an acceptance of his clear unequivocal forthrightness was necessary in order to appreciate his sterling qualities. One of the proudest occasions in his life was when he received the Society for Analytical Chemistry’s first gold-medal award in April this year-the highest tribute that could be paid by the Society to any individual with such a dedication to his work; it was a fitting reward to a man who had achieved eminence by his own hard work and unswerving devotion to the science of analytical chemistry.His latest book “An Approach to Chemical Analysis-Its Development and Practice,” appeared in April this year and this can be regarded as an autobiography because it covers his involvement in the progress and development of analytical chemistry as he saw and experienced it. The book is a masterpiece of logical thinking and clear expression so typical of him. It is interspersed with quotations one of which now more fitting than before his death is the last paragraph in the book shall we say his OWN obituary.Wherefore I perceive that there i s nothing better than that a man should yejoice in his own works; for that i s his portion. For who shall bring him to see what shall be after him. W. T. ELWELL November 19661 MEMBERSHIP CHANGES 177 Changes in the Register of Members NEW MEMBERS ORDINARY MEMBERS Robert Thomas Anderson; Frederick George Angell B.Sc. Ph.D. (Birm.) F.R.I.C. ; David Arnold Bartram B.Sc.(Lond.) L.R.I.C. ; Keith Bates; Keith Malcolm Bloomer M.Inst.Met. ; John Arnold Boother; Harry Raymond Broomhall BSc. (Bristol) F.R.I.C. ; Professor Claudio Calzolari Doc.Chem.(Modena) ; Arnold Leonard Carlson B.Sc. L.R.I.C. A.F.Inst.Pet. ; Angela Mary Collins B.Sc. (Exeter) ; Clive Lyndon Davis; John Robert Dowey B.A.(Toronto) ; Eric Dunn; Geoffrey England; Anthony Edwyn Gibbs B.Sc.(Dunelm.) A.R.I.C. Dip.Ed. ; Jeffrey William Green L.R.I.C. ; Albert Hall B.Sc.(Durham) ; Derek Colin Hinge B.Sc.(Lond.) A.R.C.S. A.R.I.C. ; Hajime Ishii Grad.Fac.Eng. (Tohoku) ; Herbert George Leopold Jones; Hilary Arthur Jones F.R.I.C. ; Mieczyslaw Klak Dipl.Ing. (Lond.) ; Manfred Landau B.Sc. (Witwatersrand) A.R.I.C. ; John Stephen Leahy M.A. (Oxon.) ; Hubert Marquet-Ellis D.E.S.T. C.N.A.M. ; Joseph Meyrath Dipl.Ing.Agr. Dr.sc.techn. (Zurich) ; Vasant Anant Mulay B.Sc. (Poona) ; Alfred William Nicholls M.A. B.Sc. (Oxon.) M.Sc. (Bristol) ; Eileen Jessie Osman B.Sc. (Lond.) ; Christopher Panayi B.Pharm. M.P.S. ; Mohammed Abdus Sami Khan M.Sc.(Osmania) ; Anthony Gordon Scobie B.Sc.(Lond.) ; Peter George Sewell; David Smith; Kenneth Walter West; William Wright. JUNIOR MEMBERS Betty Dutton L.I.Bio1. ; Colin Ward Fuller B.Sc.(Exeter) ; Peter William Hall; Philip Healey Johnson B.Sc. (Lond.) ; Anthony William Mace B.A. (Cantab.) ; James Douglas Nicholson A.H.-W.C. ; Miguel Parraga-Luna; Rosalind Elizabeth Ross B.Sc. (Witwatersrand). DEATHS WE record with regret the deaths of James Caithness Eaton Cyril Joseph Heath Stock Herbert Newton Wilson.

ISSN:0037-9697    

DOI:10.1039/SA9660300176

出版商:RSC    

年代:1966

数据来源: RSC

摘要:

November 19661 MEMBERSHIP CHANGES 177 Publications Received The publications listed below have been received by the Editor of The Artalyst in which journal Book Reviews will continue to appear. GUIDE TO THE ANALYSIS OF PESTICIDE RESIDUES Volumes 1 and 2. By H. P. BURCHFIELD DONALD E. JOHNSON and ELEANOR E. STORRS. Pp. xviii + 482 (Volume 1); xii + 656 (Volume 2). Washington D.C. U.S. Government Printing Office. 1965. Price $12.75 per set. Translated by L. MANDEL. Pp. xiv + 520. Jerusalem Israel Program for Scientific Translations ; Distributed in Great Britain and the Commonwealth South Africa Eire and Europe by the Oldbourne Press London. 1966. Price 155s. STANDARD METHODS OF CHEMICAL ANALYSIS. Sixth Edition Volume Three-Instrumental Methods Parts A and B. Pp. xviii + 973 (Part A); xii + 2018 (Part B).Princeton New Jersey Toronto London and New York D. Van Nostrand Co. Inc. 1966. Price Single Volume fTl8 18s. Od. If part of Complete Set fTl6 16s. Od. POLAROGRAPHY 1964. PROCEEDINGS OF THE THIRD INTERNATIONAL CONGRESS SOUTHAMPTON. Volumes 1 and 2. Edited by GRAHAM J . HILLS Ph.D. D.Sc. F.R.I.C. Pp. xxviii + 1-685 (Volume 1) ; xxviii + 687-1164 (Volume 2). London and Melbourne Macmillan. 1966. Price fTl5 15s. Od. per set. MOLECULAR ASPECTS OF SYMMETRY. By ROBIN M. HOCHSTRASSER. Pp. xiv + 355. New York and Amsterdam W. A. Benjamin Inc. 1966. Price $15.75. PRACTICAL PHOTOMICROGRAPHY. By J. BERGNER E. GELBKE and W. MEHLISS. Pp. 228. London and New York The Focal Press. 1966. Price 63s. COMPLEX COMPOUNDS OF URANIUM. Edited by I. I. CHERNYAEV. Edited by FRANK J. WELCHER Ph.D.178 PUBLICATIONS RECEIVED [Proc. SOC. Analyt. Chem. PRATIQUE DE L’ANALYSE ORGANIQUE COLORIMETRIQUE. By M. PESEZ P. POIRIER and J. BARTOS. Pp. vi + 352. Paris Masson et Cie. 1966. Price F70. THE MOLECULAR ORBITAL THEORY OF CONJUGATED SYSTEMS. Pp. xvi + 576. New York and Amsterdam W. A. Benjamin Inc. LABORATORY HANDBOOK OF TOXIC AGENTS. Second Edition. Edited by C. H. GRAY. Pp. x + 100. London The Royal Institute of Chemistry. 1966. Price 24s. ION EXCHANGE IN MIXED AND NON-AQUEOUS MEDIA. By JOHANN KORISCH. SOME NEUTRAL BIFUNCTIONAL ORGANOPHOSPHOROUS COMPOUNDS AS SOLVENT EXTRACTANTS. By JEROME W. O’LAUGHLIN. By JOHN FARIS and ROBERT F. BUCHANAN. By G. A. BURNEY E. K. DUKES and H. J . GROH. THE ANALYTICAL CHEMISTRY OF POLONIUM. By ROBERT C. LANGE. Pro- gress in Nuclear Energy Series IX Analytical Chemistry Volume 6.Pp. vi + 260. Oxford London Edinburgh New York Paris and Frankfurt Pergamon Press. OILS FATS AND FATTY FOODS. THEIR PRACTICAL EXAMINATION. Fourth Edition. By K. A. WILLIAMS B.Sc. Ph.D. M.Inst.Pet. A.Inst.P. F.R.I.C. Pp. viii + 488. London J . & A. Churchill Ltd. 1966. Price 100s. ANALYSIS OF THE NEW METALS-TITANIUM ZIRCONIUM HAFNIUM NIOBIUM TANTALUM TUNG- STEN AND THEIR ALLOYS. Oxford London Edinburgh New York Toronto Paris and Braunschweig Pergamon Press. 1966. Price 60s. INTRODUCTION TO MASS SPECTROMETRY. By H. C. HILL. Pp. xi + 135. London Heyden & Son Ltd. 1966. Price 30s; $4.50. THE RADIOCHEMICAL MANUAL. Second Edition. Edited by B. J. WILSON. Pp. 137. Amer- sham The Radiochemical Centre. 1966. Price 50s. OPERATOR METHODS IN LIGAND FIELD THEORY.By HIROSHI WATANABE. Pp. x + 193. New Jersey Prentice-Hall Inc. 1966. PHOTOELECTRIC COLORIMETRY IN CLINICAL BIOCHEMISTRY. By G. E. DELORY M.Sc. Ph.D. Pp. xi + 80. London Hilger & Watts Ltd. 1966. Price 25s. PRACTICAL HINTS ON ABSORPTION SPECTROMETRY. Pp. xii + 266. London Hilger & Watts Ltd. 1966. Price 50s. ELEMENTARY PRACTICAL ORGANIC CHEMISTRY. PART 1 SMALL SCALE PREPARATIONS. By ARTHUR I. VOGEL D.Sc. D.I.C. F.R.I.C. Second Edition. Pp. xx + 435. London Longmans Green and Co. Ltd. 1966. Price 35s. Edited by C. A. JOHNSON B.Sc. B.PHARM. F.P.S. F.R.I.C. and A. D. THORNTON-JONES M.P.S. Pp. x + 133. London The Pharmaceutical Press. 1966. Price 35s. By LOUIS C. SCHROETER. Oxford London Edinburgh New York Toronto Paris and Frankfurt Pergamon Press. 1966.Price 70s. THE INTEGRATION OF TECHNOLOGIES. Edited by LESLIE HOLLIDAY. Pp. 167. London Hutchinson & Co. (Publishers) Ltd. 1966. PESTICIDES IN THE ENVIRONMENT AND THEIR EFFECTS ON WILDLIFE. The Proceedings of an Advanced Study Institute sponsored by the North Atlantic Treaty Organization Monks Wood Experimental Station England 1-14 July 1965. Supplement to Volume 3 of The Jouvnal of Applied Ecology (June 1966). Edited by N. W. MOORE. Pp. xii + 311. Oxford Blackwell Scientific Publications. 1966. Price 70s. ; $12.00. PRINCIPLES OF REGULATORY DRUG ANALYSIS. By DANIEL BANES. Pp. vi + 157. Washington D.C. Association of Official Analytical Chemists. 1966. Price $5.00 in U.S.A. ; $5.25 elsewhere. Edited by CHEMIKERAUSSCHU~ DER GESELLSCHAFT DEUTSCHER METALL- HUTTEN- UND BERGLEUTE E.V. Volume 1 SCHIEDSANALYSEN. Third Edition. Pp. xii + 507. Berlin Heidelberg and New York Springer-Verlag. By LIONEL SALEM. 1966. Price $22.50. ANION EXCHANGE IN NITRATE SOLUTIONS. ANALYTICAL CHEMISTRY OF NEPTUNIUM. 1966. Price 90s. By W. T. ELWELL and D. F. WOOD. Pp. xii + 275. Price 96s. By J. R. EDISBURY D.Sc. Ph.D. DRUG IDENTIFICATION. SULFUR DIOXIDE APPLICATIONS IN FOOD BEVERAGES AND PHARMACEUTICALS. Pp. xiv + 342. Price 30s. ANALYSE DER METALLE. 1966. Price DM 57.

ISSN:0037-9697    

DOI:10.1039/SA9660300177

出版商:RSC    

年代:1966

数据来源: RSC