摘要:

Proceedings of the Society for Analytical Chemistry CONTENTS Proc. SOC. Anal. Chem. Reports of Meetings . . . . 71 Chemistry . . .. . . 73 Solvent Extraction i n Analytical Some Aspects of Power-station Practice .. .. . . 76 Papers accepted for The Analyst 78 Membership changes . . . . 79 Publications Received . . . . 79 Notices . . .. . . .. 81. Corrigenda.. . . . . .. 82 Forthcoming Meetings . . Back cover May 1965 Vol. 2 No. 5 May 1965 PROCEEDINGS THE SOCIETY FOR ANALYTICAL CHEMISTRY OF President of the Society A. A. Smales O.B.E. Hon. Secretary of the Society S. A. Price Hon. Jrrosurer 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 J.B. Attrill Proceedings i s 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 a t the above address (NOT through Trade Agents) price 2s. 6d. post free. Remittances payable to “Society for Analytical Chemistry” MUST accompany orders REPORTS OF THE ANALYTICAL METHODS COMMITTEE Reprinted from The Analyst Recommended Methods of Assay of Crude Drugs Reprints of five Reports prepared by Panels appointed by t h e Joint Committee of the Pharmaceutical Society and the Society for Analytical Chemistry on Methods of Assay of Crude Drugs are available direct from the Secretary The Society for Analytical Chemistry 14 Belgrave Square London S.W.1 (not through Trade Agents) price I s . 6d. to members of the Society for Analytical Chemistry and 2s. 6d. to non-members. A remittance made o u t to “Society for Analytical Chemistry” MUST accompany every order. “The Determination of Rotenone in Iiotenone-bearing Plants with Special “Assay of Rauwolfia” (reprinted from The .4naZyst 1960 85 755-764). “The Colorimetric Determination of Rotenone” (reprinted from The Reference to Lonchocarpus” (reprinted from The Aizalyst 1959 84 735-742). ,4nalyst 1961 86 745-755). “The Determination of the Capsaicin Content of Capsicum and its Preparations” (Second Report of the Panel) (reprinted from The Analyst 1964 89 377-355). This report supersedes the first report of the Panel published in 1969. “The Assay of Pyrethrum” (reprinted from The Analyst 1964 89 689-706).

ISSN:0037-9697    

DOI:10.1039/SA96502FX015

出版商:RSC    

年代:1965

数据来源: RSC

摘要:

THE SOCIETY FOR ANALYTICAL CHEMISTRY Reprints of Review Papers ICEPRINTS of the following Review Papers published in The ANaZyst are available from the Secretary The Society for Analytical Chemistry 14 Kelgrave Square London S.W. 1 (not through Trade Agents). Orders MUST be accompanied by a remittance for the correct amount made out to “Society for Analytical Chemistry.” “The Analysis of Synthetic Detergents,” by W. 13. Smith (February 1959). “The Infra-red Analysis oP Solid Substances,” by G. Thyckaerts (April 1959). Price 2s. lid. “X-ray Fluorescence Analysis,” by €7. Brown (June 1959). “Ferrous Metallurgical Analysis,” by H. Bagshaw (August 1959). Price 5s. “Zone Melting with Some Comments on its Analytical Potentialities,” by E. F. C. Herington “The Analytical Chemistry of Zirconium,” by G.W. C. Milner and J . W. Edwards (February “Light-scattering Methods for the Chemical Characterisa tion of Polymers,” by I;. TV. Peaker “Analysis of Organo-silicon Compounds with Special Reference to Silanes and Siloxanes,” “Flame-photometric Methods in Metallurgical Analysis ” by John A. Dean (September 1 960). “The Oxygen Flask Method,” by A. M. G. Macdonald (January 1961). “Analytical Chemistry of Reryllium,” b y I,. E. Smythe and R. N. Whittem (February 1961’). “Determination of Residual Organo-phosphorous Insecticides in Foodstuffs,” by E. D. Chilwell “Biological Standardisation and the Analyst,” by J . W. Lightbown (April 1961). Price 5s. “‘The Toxicology of Nitrates and Nitrites with Particular Reference to the Potability of Water “Coulometric Methods in Analysis,” by 1).T. Lewis (August 1961). Price 5s. “Emission Spectroscopy of Solutions,” by L. G. Young (January 1962). “Analytical Applications oP the Mercury Electrode,” by J . A. Page J. A. Maxwell and K. P. “The Determination of Tantalum and Niobium,” by M. H. Cockbill (August 1962). Price 5s. “Classification of Methods for Determining Particle Size,” b y the Particle Size Analysis Sub- Committee of the Analytical Methods Committee (March 1963). Price 5s. “Methods of Separation of Long-chain Tinsaturated Fatty Acids,” by A. T. James (August 1963). Price 5s. “Beer’s Law and its Use in Analysis,” b y G. I;. Lothian (September 1963). “A fieview of the Methods Available for the Iletection and Tletermination of Small Amounts Price 5s. “Circular Dichroism,” by R. D. Gillard (November 1963). “Information IZetrieval in the Analytical Laboratory,” by I).It. Curry (November 1963). “Thermogravimetric Analysis,” by A. W. Coats and J. I?. Redfern (December 1963). Price 5s. “Some Analytical Problems Involved in Determining the Structure of Proteins and Pepticles,” “The Faraday Effect Magnetic Rotatory Dispersion and Magnetic Circular Ilichroism,” by Reprints of Review PaPers not on this list aye no longer available from the Society. Many back numbers of The Analyst are still available and may be brought from Messrs. W. Heffer & Sons Ltd. 3-4 Petty Cury Cambridge price E l plus 9d. postage. Price 2s. (id. Price 2s. 6d. (December 1959). Price 5s. 1960). Price 5s. (April 1960). Price 5s. by J. C. R. Smith (July 1960). Price 5s. Price 5s. Price 5s. Price 5s. and G. S. Hartley (March 1961).Price 5s. Supplies,” by E. H. W. J. Burden (July 1961). Price 2s. 6d. Price 5s. Graham (April 1962). Price 5s. Price 5s. of Cyanide,” by L. S. Bark and H. G. Higson (October 1963). Price 2s. 6d. Price 2s. 6d. by Derek G. Smyth and D. 1;. Elliott (February 1964). J. G. Dawber (December 1964). Price 5s. Price 5s. THE SOCIETY FOR ANALYTICAL CHEMISTRY Forthcoming Meetings May Wednesday 26th LONDON Friday 28th LONDON Friday 28th to Monday 31st SCARBOROUGH MICROCHEMICAL Mrs-rHous GROUP 1 )iscussion -Meeting. “The Feathers,” Tudor Street London E.C.4; 6.30 p.m. THERMAL ANALYSIS GROUP Inaugural Meeting. “I1.T.A. and T.G.A. Studies at Salford on Metal Oxy-salts Coals and Poly- “Thermal Stability Studies on l’olymers,” by W. W. Wright Ph.D. A.R.I.C. “Thermal Analysis Studies of Phenolic Resin Systems,” by K. L. Treherne “Thermal Analysis in the Investigation of Naturally Occurring Inorganic Meeting Room of The Chemical Society Burlington House Piccadilly London NORTH OF ENGLAND SECTION Summer Meeting. Prince of Wales Hotel Scarborough. Ordinary Meeting Saturday morning. “The Examination of Cosmetics,” by A. S. Heidas B.Sc. F.R.I.C. Social programme. mers,” by I>. Dollimore Ph.D. F.R.I.C. J.P. B.Sc. and Organic Materials,” by B. 1). Mitchell B.Sc. A.R.I.C. W.1; 6.30 p.m. SAC CONFERENCE Nottingham Monday July 19th to Friday July 23rd For details of papers to be presented see Proceedings April 1965 pp. 66-68 Applications can s t i l l be accepted if you WRITE AT ONCE to Mr. A. S. Beidas B.Sc. F.R.I.C. Standards Department Boots Pure Drug Co. Ltd. Station Street Nottingham

ISSN:0037-9697    

DOI:10.1039/SA96502BX017

出版商:RSC    

年代:1965

数据来源: RSC

摘要:

May 1965 PROCEEDINGS OF THE SOCIETY FOR ANALYTICAL CHEMISTRY Vol. 2 No. 5 Reports of Meetings ORDINARY MEETING AN Ordinary Meeting of the Society was held a t 2.30 p.m. on Wednesday May 5th 1965 in the Main Lecture Theatre Bradford Institute of Technology Bradford. The Chair was taken by Mr. C. Whalley R.Sc. F.R.I.C. (Vice-president). The Meeting consisted of contributions from research workers in Universities and Colleges o f Advanced Technology and the following papers were presented and discussed “Rhodizonic Acid as an Analytical Reagent,” by R. A. Chalmers B.Sc. Ph.D. F.R.I.C. and G. M. Telling A.R.I.C. ; “The Modification of a Thermobalance to Perform Simultaneous Thermogravi- metric and Differential Thermal Analysis,” by E. L. Charsley B.Sc. and J. P. Redfern Ph.D. F.R.I.C. ; “Studies on Inorganic Systems of Analytical Interest Scandium 8-hydroxy- quinolates,” by T.J. Cardwell BSc. ; “Substoicheiometric Determination of Traces of Gold by Neutron-activation Analysis,” by D. A. Reardsley T>ip.Tech. A.C.T. (Birm.) Grad.R.I.C. G. B. Briscoe M.Sc. Ph.D. A.K.I.C. J . RCiiCka C.Sc. and M. Williams BSc. Ph.D. A.R.I.C.; “The Synthesis of Some New Complexones and a Discussion of the Problems that Arose in the Determination of Their Acid Dissociation Constants,” by M. G. Miles B.Sc. L. D Pettit R.Sc. M.A. D.Phil. and H. M. N. H. Irving M.A. D.Phil. D.Sc. F.R.1.L; “Ilevelopment of a Spectrophotometric Method for the Determination of Lead in Steel Brass and Bronze,” by R. M. Dagnall M.Sc. Ph.D. T. S. West Ph.D. D.Sc. F.R.I.C. and P. Young Dip.Tech. A.C.T.(Birm.) ; “The Polarographic Determination of Lead in Steels and High-temperature Alloys,” by A.G. Hamza B.Sc. and J. B. Headridge R.Sc. Ph.D. F.R.I.C. ; “Rapid Automatic Coulometric Titrations,” by D. Robinson MSc. A.R.I.C. NORTH OF ENGLAND SECTION AN Ordinary Meeting of the Section was held at 7.30 p.m. on Friday March 12th 1965 a t the Garden House Hotel North Road Durham. 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 “Modern Methods of Analysis in the Coal Industry,” by G. R. Nellist F.R.I.C. M.Inst.F. and A. H. Edwards RSc. F.R.I.C. M. 1nst.F. The meeting was preceded at 2.30 p.m. by a tour of the new laboratories of the Durham County Analyst and the Highways Laboratory. NORTH OF ENGLAND SECTION AND MIDLANDS SECTION A JOINT Meeting of the North of England and Midlands Sections was held at 10.30 a.m.on Tuesday March 30th 1965 at Boots Pure Drug Co. Ltd. Research Laboratory Pennyfoot Street Nottingham. The Chair was taken by the Chairman of the North of England Section Mr. J. F. Clark M.Sc. A.R.C.S. D.I.C. F.R.I.C. F.R.S.H. The following papers were presented and discussed “Sugar Analysis,” by R. Butler ; “The Application of Modern Techniques to Special Problems in Sugar Analysis,” by D. Gross Ph.D. ; “The Characterisation of Fats,” C. l3. Barrett B.Sc. Ph.D. A.K.I.C. ; “Characterisa- tion of Fats Examples of the Use of Old and New Methods of Analysis,” by K. A. Williams R.Sc. Ph.D. F.R.I.C. A.Inst.P. M.Inst.Pet. A JOINT Meeting of the North of England and Midlands Sections was held a t 7 p.m.on Tuesday April 6th 1965 at the Staffordshire College of Technology Stoke-on-Trent. The Chair was taken by the Chairman of the Midlands Section Mr. W. T. Elwell F.R.I.C. The following papers were presented and discussed “Inorganic Applications of Infra- red Spectroscopy,” by R. J. Magee BSc. Ph.D. F.R.I.C.; “The Examination of Clays and Clay Minerals by Infrared Spectrophotometry,” by P. S. Keeling. 71 72 REPORTS 0 1 7 MEETINGS [Proc. Soc. Anal. Clzena. SCOTTISH SECTION A N Ordinary Meeting of the Section was held at 7.15 p.m. on Friday March 26th 1965 at Falkirk Technical College Grangemounth Road Falkirk. The Chair was taken by the Chairman of the Section Mr. J. K. McLellan M.A. B.Sc. A.R.I.C. The following papers were presented and discussed “The Determination of Trace Constituents in Metallurgical Materials,” by W.T. Elwell F.R.I.C. ; “The Principles of Acti- vation Analysis,” by H. W. Wilson B.Sc. Ph.D. F.Inst.P. F.K.S.E. W’ESTERK SECTIOS AN Ordinary Meeting of the Section was held at 7 p.m. on Friday April 2nd 1965 a t the University College of Swansea Singleton Park Swansea. The Chair was taken by the Chair- man of the Section Mr. E. A. Hontoir B.Sc. A.I.M. The following paper was presented and discussed “Some Applications of Nuclear Spectroscopy to Analysis,” by T. R. Pierce BSc. M.A. D.Phil. MIDLANDS SECTION THE Tenth Annual General Meeting of the Section was held at 7.45 p.m. on Friday March 12th 1965 in the Haworth Lecture Theatre Chemistry Department The University Edg- baston Birmingham 15. The Chair was taken by the Chairman of the Section Mr.W. H. Stephenson F.P.S. D.B.A. F.R.I.C. The following appointments were made for the ensuing year :-Chairman-Mr. W. T. Elwell. Vice-Chairmart-Mr. H. E. Brookes. Hon- orary Secretary-Mr. M. L. Richardson John & E. Sturge Ltd. Lifford Chemical Works Lifford Lane Kings Norton Birmingham 30. Hortorary I’reaszwer-Mr. G. Ingram. Honorary Assistant Secretary-Mr. R. Adkins. Members of Committee-Dr. Alison M. C;. Macdonald Mr. P. G. W. Cobb Mr. S. Greenfield Mr. K. A. Hyde Dr. V. J. Jennings Mr. N. Nix Dr. G. F. Reynolds Mr. W. H. Stephenson and Dr. A. Townshend. Miss M. E. Tunni- cliffe and Mr. D. M. Peake were appointed as Honorary Auditors. The Annual General Meeting was followed by a Social Evening. MIDLANDS SECTION AND SPECIAL TECHNIQUES GROUP A JOINT Meeting of the Midlands Section and the Special Techniques Group was held at 6.30 p.m.on Tuesday March 23rd 1965 in the Haworth Lecture Theatre The University Edgbaston Birmingham 15. The Chair was taken by the Chairman of the Midlands Section Mr. W. T. Elwell F.K.I.C. The following papers were presented and discussed “Electron-probe Analysis in Mineralogy,” by J. V. P. Long M.A. Ph.D. A. 1nst.P. ; “Metallurgical Applications of the Electron-probe X-ray Illicroanalyser,” by M. J. Fleetwood M.A. Grad.Inst .P. The meeting was preceded at 2.30 p.m. by a visit to the Development and Research Department Laboratory of the International Nickel Co. (Mond) Ltd. MICROCHEMICAL METHODS GROUP THE Forty-ninth London Discussion Meeting of the Group was held at 6.30 p.m. on Wednes- day March 17th 1965 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 Construction of Home-made Apparatus,” was opened by Professor J. T. Stock MSc. Ph.D. F.R.I.C. BIOLOGICAL METHODS GROUP AN Ordinary Meeting of the Group was held at 10 a.m. on Wednesday April 7th 1965 at the School of Pharmacy Brunswick Square London W.C. 1. The meeting took the form of a one-day Symposium on “The Pharmacological Screening of New Drugs.” The Chairman of the morning session was Dr. li. Hartley BSc. F.P.S. F.R.I.C. and the following papers were presented and discussed Introduction by the Chair- man; “Organisation of Pharmacological Screening Tests,” by J. K. Vane BSc. D. Phil. ; “Statistics for Pharmacological Screening,” by J. J. Grimshaw B.Sc. ; “Anti-fertility Agents,’’ by D. K. Vallance R.Sc. Ph.D. The Chairman of the afternoon session was Professor G. A. H. May 19651 SOLVENT EXTRACTION IN ANALYTICAL CHEMISTRY 7 3 Buttle O.B.E. MA. M.R.C.S. L.R.C.P. and the following papers were presented and discussed “Centrally Acting Hypotensives,” by R. C. Elliott B.Sc. Ph.D. ; “Anti-depress- ants,” by A. W. Lessin BSc.; “Analgesics with Special Reference to Drug Dependence,” by R. E. Lister RSc. Ph.D.; Closing remarks by the Chairman.

ISSN:0037-9697    

DOI:10.1039/SA9650200071

出版商:RSC    

年代:1965

数据来源: RSC

摘要:

May 19651 SOLVENT EXTRACTION IN ANALYTICAL CHEMISTRY 7 3 Solvent Extraction in Analytical Chemistry The following are summaries of papers presented at the Ordinary Meeting of the Society held on December 2nd 1964 and reported in the December 1964 issue of Proceedings (p. 129). The Solvent Extraction of Inorganic Species BY H. M. N. H. IRVING (Department of Inorganic and Stvuctural Chemistry The Univevsity Leeds 2) PmFEssoR IRVIKG said that the basic problems involved in the transfer of inorganic species from an aqueous to an immiscible organic phase could be most simply envisaged in terms of the “hole” theory. It was easier to open up a free volume of a given size in an organic solvent than in water but this energy difference (which would favour extraction into the non-aqueous solvent) might be more or less completely offset by differences in solvation energy in the two media.On these simplified considerations it was reasonable to classify types of extractable substances under several headings leading from e.g. iodine and astatine through ruthenium tetroxide and stannic iodide to the vast group of formally neutral metal-chelate complexes. If the maximum co-ordination number was not reached in these metal chelates (as for ex- ample with magnesium and 8-hydroxyquinoline HOx) a hydrophilic compound MgOx.2H20 might result that could not be extracted although the anhydrous species MgOx, was soluble in chloroform. The replacement of the co-ordinated water by some other donor molecule that was bound more firmly than water and which produced a larger a less hydro- philic and a co-ordinatively saturated molecule had been shown to permit the extraction of magnesium.Such “synergic” effects in solvent extraction were of particular importance among the actinides (where the effect was first discovered with uraniumv1) but the phenomenon was found with metals in all valency states with a wide variety of chelating ligands and donor molecules and in various parts of the periodic table. For the analyst the most significant term in liquid - liquid extraction was the value of the distribution coefficient q. When this was different for two species A and B the possi- bilites of separation arose although when qL4/qB approached unity it might be necessary to employ multiple stages of separation as in countercurrent columns mixer - settler equipment or by chromatographic techniques of the type that would form the subject of Dr.Pierce’s paper (summarised below). With metal-chelate systems the value of q was most readily modified by changes in pH and by the presence of masking agents. In the extraction of e.g. the halides nitrates or thiocyanates of metals the concentration of the acid and the nature of the solvent played a dominant rdle. The importance of tributylphosphate and its analogues in solvent extraction led naturally to a consideration of the behaviour of other phosphorylated reagents e.g. di-(2-ethylhexyl)orthophosphoric acid and the errors that could be encountered as a consequence of working with mixtures containing even minute traces of certain impurities was stressed. The extraction of ironTTL from concentrated hydrochloric acid into ether depended on the transfer of an ion pair derived from the chloroferratc anion [FeCl,]- and a bulky cation consisting of a proton associated with water and the donor solvent.The liquid -liquid extraction of ion pairs derived from bulky cations e.g. tetraphenylarsonium per-rhenate anticipated the growing use of long-chain tertiary aliphatic amines and ammonium salts that behave as “liquid anion exchangers” by a reaction that could be formally represented by the equation- Many elegant separations were possible by using this technique and reference was made to the advantages secured by having a coloured anion X- such as was provided by Erdmann’s ,l$ (NR,X),. -I- Y”- - - (“R,I.Y)org + ?GY- salt t (N H,) [CO (NHJ 2 (NO,) 41 . 74 SOLVENT EXTRACTION I N ANALYTICAL CHEMISTRY [ I’YOC.SOC. ,4?zal. CheW4. Back-Extraction by Addition of Organic Liquids BY W. MILKOWSKI ( T h e British Xon-Fevvous NIetals Reseavch Association Euston Stveet London N . W . I) MIL MILKOWSKI (whose paper was presented by Mr. J. B. Price) said that solvent extraction was becoming valuable to the metallurgical chemist as a means of short-circuiting tedious separ a t ions. * Often an element extracted into the organic layer was in the form of a coloured complex that could be determined directly. Such a convenient procedure could not always be adopted and back-extraction of the element to be determined into an aqueous phase might be necessary. Among the ways of back-extraction probably the most widely used was to adjust the aqueous layer to suitable composition. This depended on the distribution of the complex in the two phases and might have to be repeated with fresh portions of the aqueous solution.The volume of combined aqueous portions might be too high for sufficient concentration of the new complex and the conditions for favourable back-extraction usually had to be altered for the formation of the new complex. A much more convenient way if it could be applied was to modify the organic phase so that the complex was discharged into the aqueous layer which had previously been suitably adjusted for the formation of the new complex. This could sometimes be accom- plished by adding another non-aqueous liquid to the organic and aqueous layers. Mr. Milkowski then gave two examples in which this technique could be used in lion- ferrous analysis. The first was in the determination of phosphorus in copper at the 0.02 per cm t .level. LJsual ways of determining the element colorimetrically were as either ( a ) the yellow motybdophosphate or (6) the reduced blue molybdophosphate or (c) the yellow molybdo- vanadophosphate. The extraction of the unreduced molybdophosphate complex into pentyl acetate permitted the separation of phosphorus from arsenic but the colour was not very sensitive. The reduced complex was more sensitive but its formation required close attention to detail. The condition for the molybdovanadophosphate was not so critical but arsenic interference due to the extractable arseno complex which might be considerable ruled this method out. A back-extraction from the organic layer into the aqueous phase permitted the selectivity of the niolybdophosphate reaction to be combined with the reproducible high sensitivity obtained by using the molybdovanadophosphate complex.Benzene added to a pentyl acetate extract of the molybdophosphate modified the solubility of the phosphorus complex resulting in the discharge of this into a fresh aqueous layer in which the conditions had already heen adjusted to be suitable for the formation of molybdovanadophosphate complex. ?‘li(i colour was then read directly on the spectrophotometer. The other method presented was the determination of bismuth (down to about 2 p.p.m.) in copper. Copper was precipitated with potassium iodide and the iodine liberated reduced with sodium hypophosphite. In order to increase the concentration of the bismuth iodide complex extraction into a mixture of pentyl acetate and pentanol was carried out.Owing to the interference of iodine direct spectrophotometric determination in the organic layer was impracticable and back-extraction was necessary. This was easily accomplished by adding carbon tetrachloride the bismuth complex being discharged into a fixed amount of aqueous layer that had been already suitably adjusted for the final conditions. In this way the concentration of the complex was increased about ten times. Antimony clid not interferc. The Determination of Long-chain Fatty Acids and Surface-active Reagents in Mineral-flotation Liquors KY G. R. E. C. GREGORY ( Wavven Spying ldmvatov-y Mitzistvy of Technology Steuevzage I-levts.) MR. GREGORY said that ionic surface-active agents were used as promoters in niany industrial processes involving the separation of minerals by flotation.Traces of anionic non-soapy detergents in solution were usually determined by coupling with a suitable dye and extracting the adduct into an organic medium for photometric measurement. For the soaps reaction May ZSSli] SOLVENT EXTRACTION I N ANALYTICAL CHEMISTRY 75 with the carboxylate anion in neutral or acidic solution was hindered by hydrolysis. The available cationic dyes were unsuitable for use in alkaline solution. However the cationic complex formed between cupric ions and triethylenetetramine reacted with soaps at pH values above 11. The adduct formed could be extracted into an isobutanol - cyclohexane mixture. The extract was weakly coloured but the addition of a sensitive reagent for copper such as a dithiocarbamate allowed the determination to be completed photometrically.This procedure permitted the determination of C, to C, fatty acids at concentrations of 0.2 to 50 p.p,rn. It was also applicable to surface-active agents of the alkyl sulphate and alkyl benzenesulphonate types. An analogous system could be used for determining cationic surface-active agents by benzene extraction of the adduct with the chloroferrate anion from solution in 8 M hydro- chloric acid. Addition of an alcoholic ammonium thiocyanate solution to the extract provided a sensitive photomeric measure of the extracted iron and hence of the surface-active agent. By application of the AutoAnalyzer system it was possible to determine 0-5 to 70 p.p.m. of sodium oleate on a continuous basis in mineral-flotation liquors.Some Analytical Applications of Solvent Extraction in the Atomic-energy Industry RY T. €3. PIERCE ( T i . K . Atomic Enevgy Research Establishment Havwell Didcot Hevks.) DR. PrEriCE said that the advent of the atomic-energy industry had provided the analytical chemist with many new problems. These had included the analysis of highly active as well as inactive materials and the determination on a routine basis of elements that pre- viously had been either research curiosities or did not exist naturally at all. Further the amounts of elements determined had ranged from macro amounts to small fractions of a microgram and very high decontamination factors had often been required during chemical processing of the sample owing to the great sensitivity that could be achieved by many analytical determinations based on the measurement of nuclear radiation.Thus analytical laboratories concerned with atomic-energy projects had been closely concerned with the development of several separation techniques and solvent extraction had emerged as one of the most powerful by virtue of its speed simplicity and versatility. A wide range of extrac- tants was now available and changes in distribution ratio that could be achieved by varying acidity reagent concentration or valency forming water-soluble competitive complexes salting out etc. increased the scope of the technique. In addition to the more usual chelating systems high molecular-weight arnines alkyl and aryl substituted phosphates phosphonates phosphinates and phosphine oxides had all been investigated as extractants.Suitable systems had found use for the separation of fission products from fissile material for the separation of trans-uranium elements from each other and for many other applications. A single equilibration of a solute between two immiscible phases would not usually permit a satisfactory separation of similar substances and multiple extractions were required which could be inconvenient. As a multi-stage extraction effect could be obtained during elution of a solute from a chromatographic column partition chromatography offered the opportunity of combining the selectivity of extractants developed for liquid - liquid extraction with the advantages of chromatographic operation. A column material possessing selective extraction properties could be prepared quite simply by adding a solution of the complexing agent in a volatile organic solvent to an inert carrier and then evaporating off the solvent.Carrier made up like this and retaining the complexing agent could often be made into a slurry and made up into a column in the same way as is used for ion-exchange resins. The reagent in these systems should preferably give good separation factors for the solutes to be separated have as high a capacity as possible give a rapid rate of reaction with solutes to provide a well shaped elution peak (the presence of an organic solvent on the carrier would probably be necessary if the reagent was a solid) have a low solubility in the aqueous phase and give distribution ratios that could be widely varied if both extraction and elution were required. The carrier should preferably be able to retain as large an amount of the reagent as possible be cheap require as little pretreatment as possible be resistant to a wide variety of aqueous phases and should not react with the elements being eluted. 76 SOME ASPECTS OF POWER-STATION PRACTICE [Proc. Soc. Anal. Chevtz. A wide variety of carriers including silica gel kieselguhr cellulose and polymeric materials had been tried and used in conjunction with many different reagents and methods of routine analysis had been devised that had been used successfully for several years.

ISSN:0037-9697    

DOI:10.1039/SA9650200073

出版商:RSC    

年代:1965

数据来源: RSC

摘要:

76 SOME ASPECTS OF POWER-STATION PRACTICE [Proc. Soc. Anal. Chevtz. Some Aspects of Power-station Practice The following are summaries of the papers presented at the meeting of the Midlands Section held on December 8th 1964 and reported in the January 1965 issue of Proceedings (P- 1)- Experiences in U.S.A. on Boilers BY D. H. JOHNS (Centval Electvicity Genevating Boaifd The Laboratory Hams Hall Power Station Sutfon Cold$eld Warwicks.) MR. JOHNS said that boiler technology in the U.S.A. was generally about 3 to 4 years in advance of that obtaining in Great Britain. This was mainly the result of economic aspects such as the natural wealth of the country the large population and high standard of living. The Americans were determined to maintain their advantage and consequently their forward planning was of a high quality much use being made of the critical path method.Power-station practice in the U.S.A. was similar to that in Britain but with more emphasis on instrumental plant analysis. This was expectable bearing in mind the starting salary of a laboratory assistant was about $80 per week and of a graduate about $130 per week. Opinion was divided on the question of zero solids ueysus low (i.e. <25 p.p.m.) soluble solids in the boiler water of high-pressure sub-critical conventional plant. Hydrogen damage had been experienced with both types of treatment. Some chemists thought that zero solids might lead to insoluble siliceous deposits on the turbine blades. The American limits for silica in boiler water were not as low as those in Britain. For 2600 p s i . boilers the maximum silica concentration usually allowed was 0-3 p.p.m.Feed-water treatment was generally carried out by using ammonia to give a conductivity of 2.5 to 4.3 micromhos per c.c. at 25” C and thus a pH of 8.8 to 9.1 and some power companies used hydrazine as an oxygen scavenger. In “once-through” boilers ammonia was used for pH control and hydrazine was used as an oxygen scavenger. ‘Volatile amines such as morpholine and cyclohexylamine were out of favour as they were broken down to ammonia in high-pressure plant. The equipment for chemical dosing was well designed and efficient. WATER SAMPLING ANT) INSTRUMENTAL PLANT ANALYSIS- No thought had been given to isokinetic sampling of feed-water for copper iron and nickel sampling systems being run generally in &inch diameter stainless-steel tubing.Recording instrumental methods were used on the plant for determining conductivity silica hydrogen hydrazine iron and copper in feed-water. On a particular “once-through” boiler the silica content and conductivity were checked by computer intelligence and the unit was shut down automatically if the conductivity exceeded 0.8 micromho per C.C. In the U.S.A. no attention seemed to have been given to a statistical approach to samp- ling and analysis of feed-water as was currently being carried out in Great Britain. Analytical methods did not seem to have been checked for bias nor was their precision known with any certainty. COAL SAMPLING AND ANALYSIS- A statistical approach was not being pursued for coal sampling and analysis other than the fact that A.S.T.M.methods were used. For monitoring power-station efficiency automatic sampling devices were in operation. Mr. Johns said that it should be noted that the coal burned was much less variable higher in calorific value and lower in heat cost than that available to British power stations. Whereas the quality of the work in the laboratories was good the equipment was rather May 19651 SOME ASPECTS OF POWER-STATION PRACTICE 77 out of date. been in use in Britain since 1959 was just being introduced in the U.S.A. INSTRUMENTAL LABORATORY ANALYSIS- In the analytical laboratory wet chemical analysis was out of favour on a cost basis and great emphasis was placed on spectrographic gas-chromatographic and infrared-spectroscopic techniques. It had been generally acknowledged however that for boiler- and feed-water analysis wet techniques were the most satisfactory.A Jarrell-Ash spectrograph had analysed 35,000 samples in 10 years including alloys coal ash wood ash copper in insulating and lubricating oils and internal and external boiler deposits. All samples had been analysed without being brought into solution. The F & M 500 gas chromatograph had been used for determining hydrogen oxygen nitrogen methane carbon monoxide ethane carbon dioxide ethylene propylene and acetylene in samples of gas from Buchholz relays fitted on transformers. Infrared-spectroscopic analysis had been carried out on a Beckman IR5 spectrophoto- meter. Some of the applications were the identification of rubber plastics and paints trace organic contaminants lubricating oils and greases and insulating oils.The speaker thought that American technology as far as boilers were concerned had been more progressive in the past than that in Britain but that their scientific approach at present was lagging behind. The author thanks the Central Electricity Generating Board and the Electricity Council under The adiabatic bomb calorimeter which has been available conimercially and whose aixspices his visit to the U.S.A. was made for permission to publish this summary. Principles of Control of High-pressure Boilers BY E. C. POTTER ( Watev Reseavch Association Fervy Lane Mpdmenham Mavlow Bucks.) I h . POTTEI~ said that most of Britain's electric power was produced at central stations by machines driven by steam turbines. The steam was supplied by boilers that in the most modern units had an individual output of about 25 tons per minute at 570" C and 2400 p.s.i.pressure. The water and steam passing through a modern power boiler encountered large areas of ferrous metal and it was vital that such surfaces particularly those supporting the boiling process remained free of corrosion and heat-resisting deposits. The steam generation took place inside mild-steel tubes heated for design reasons from the outside around one half of the circumference; and the internal surfaces o€ these tubes were the most sensitive to corrosive attack. However in an average year the proportion of steam-generating surface that failed through corrosion was only about 1 part to los a remarkably small figure considering the exacting conditions to which the metal was subjected. This degree of success was funda- mentally attributable to the formation of an adherent and coherent film of magnetite on the hot steel surfaces as a result oi reaction between iron and water and a principal object of water conditioning for modern steam boilers was to preserve and repair the protective magnetite film throughout the life of the plant.In general acidic water conditions were inimical to steel and magnetite in boilers whereas mildly alkaline conditions were protective. Neutral conditions represented by pure water were quite acceptable except that they provided no safeguard against acidic contamination which occasionally invaded the plant under fault conditions. All boiler waters were accord- ingly made slightly alkaline (approximately N) and the outstanding technical problem concerned the choice of the alkali.Sodium carbonate (or sodium hydrogen carbonate) was un- suitable because under high-temperature boiling conditions partial hydrolysis took place releasing carbon dioxide which created acidic conditions where condensation occurred. More worthy sources of the necessary alkali were sodium hydroxide trisodium phosphate and volatile sources such as ammonia morpholine or cyclohexylamine. On one hand the chief advantage of the volatile sources was that they distributed themselves throughout the plant and thereby penetrated to areas of the pre-boiler system that could not be protected for design reasons with solid solutes such as caustic soda. On the other hand this very property of volatility left the steam-generating surfaces denuded of alkaline protection.A further insur- mountable difticulty led to the exclusion of organic amines e.g. cyclohexylamine because these 78 PAPEKS ACCEPTED FOR PUBLICATION [Proc. SOC. AnaZ. Chew. could not avoid a journey through the superheater where they decomposed to ammonia and unidentified residues. Nevertheless ammonia (with hydrazine if necessary) was an indispens- able added constituent of boiler feed-waters for modern British power stations. Different considerations niade sodium hydroxide and trisodium phosphate less than perfect for boiler-water control (their use in the pre-boiler system was excluded because they were solid). A t a steam-generating surface the process of ebullition caused an enrichment of non-volatile solutes in the residual liquid phase. This effect was not in direct proportion to the steam production because there was a momentary additional enrichment depending on the local degree of overheating of the metal surface and on the vigour of the steam and water circulation over the surface in question.For these reasons relevance was attached to much higher concentrations of solid solute than the analyst measured in samples of boiler water withdrawn from the plant. Unfortunately trisodiuni phosphate had a solubility in water that decreased with rising temperature in the modern boiler range and in common parlance this salt must be regarded as insoluble above about 350” C. This property explained the phenomenon of “hide-out,” which showed as an analytical loss of phosphate so long as steam generation continued. The phosphate was expelled from solution and besides impairing heat transfer was no longer effective as an alkali. Caustic soda was too soluble to “hide-out,’> but in a poorly designed boiler could possibly enrich to levels exceeding about 40 per cent. at which level the protective quality of magnetite was gradually lost. With proper boiler design and operational care however sodium hydroxide used in moderation should prove a safe and effective protector of boiler surfaces and to this end the existing standard for British high- pressure boilers stood at 3 to 6 p.p.m. as sodium hydroxide.

ISSN:0037-9697    

DOI:10.1039/SA9650200076

出版商:RSC    

年代:1965

数据来源: RSC

摘要:

PAPEKS ACCEPTED FOR PUBLICATION [Proc. SOC. AnaZ. Chew. Papers Accepted for Publication in The Analyst THE following papers have been accepted for publication in 7he Analyst and are expected to appear in the near future. “The Absorptiometric Determination of Chlorine in Water,” by H. M. Webber and “The Thin-Layer Clirornatographic Determination of Triazine Herbicides in Soil and “The Volumetric Determination o f Silica and its Application to Ferromanganese Slag and “Estimation of Tomato Solids by Determination of Lycopene,” by 0. R. Darbishire. “The Rapid Determination of Carbon in Steels by Measurement of the Prompt liadiation Emitted During Deuteron Bombardment,” by T. 13. Pierce P. F. Peck and W. Me Henry. “An Infrared Spectrophotometric Method for the Determination of ‘Pyretlirin TI’,’’ by J .H. N. Byrne William Mitchell and F. H. Tresadern. “Micro-determination of Zinc and Copper in a Single Digest of Small Samples of Plant hilaterial,” by E. J i . Page. “The Separation of Annatto Pigments by Thin-layer Chromatography with Special Reference to the Use oi Analytical-grade Iieagents,’I by €3. J . Francis. “The Amperometric Titration of Submillimolar Concentrations of Iron111 with Alercuryl Perchlorate,” by J. T. Stock and Y . Heath. “A Simple Concentration-cell Technique for the Determination of Small Amounts of Halides and its use in the Determination of Residues of Organo-chlorine Pesticides,” by J. Roburn. “The Determination of Sodium in Heavy Fuel Oils by Neutron-activation Analysis ” by K. D. Caddock and J . H. Deterding. “Polarographic Determination of Iron Nickel Manganese Zinc Copper and Cobalt in Magnetic Materials,” by E.Id. Bush and E. J . Workman. “Electrophoresis in Stabilizing Media,” by D. Gross. Elizabeth A. Wheeler. Water,” by D. C. Abbott IZ’Irs. J. A. I3unting and J . Thomson. Silicomanganese Analysis,” by A. G. C. Morris. (A Review.) May 19651 CHANGES IN THE REGISTER OF MEMBERS 79 “Determination of Chloride in Beer by Radioactivation Analysis,” by A. G. Souliotis A. P. Grimanis and N. A. Tsanos. “Analytical Results for the Paper Chromatographic Zone - Strip Technique,” by Ibrahim R. Shimi and Gamal M. Imam. “Analysis o€ Hexachlorocyclopentadiene by Infrared Spectrophotornetric arid (;as - Liquid Chromatographic Methods,” by M. Livai- and J. Hrivkik. “The Determination of Perchlorate in the Presence of Other Halogen Acids by Means of a Coloured Liquid Anion Exchanger,” by H. M. N. H. Irving and A. D. Damodaran. “The Use of 50 Per Cent. Hydrogen Peroxide for the Wet Oxidation of Organic Materials,” by R. P. Taubinger and J. R. Wilson. “A Simple Micro Colorimetric Method for the Determination of Lactose in Milk,” by Nagi Wahba. “’The Determination of Acetone in Air,” by H. Buchwald. “Plastic Standard-taper Joints,“ by G. M. Leet.

ISSN:0037-9697    

DOI:10.1039/SA9650200078

出版商:RSC    

年代:1965

数据来源: RSC

摘要:

May 19651 CHANGES IN THE REGISTER OF MEMBERS 79 Publications Received The publications listed below have been received by the Editor o€ 7’he A nalyst in which journal Rook lieviews will continue to appear HARRY L. FRISCH and JOEL I,. LEBOWITZ. m7. A. Benjamin Inc. 1964. Price (cloth) $11.00; {paper) $6.55. Amsterdam W. A. Benjamin Inc. ,. 1 HE EQUILIT3KIUM ‘rEIEO1iY OF CLASSICAL FLTJIIIS A 1,TSCTUKE NOT13 AN]) l<EPKINT VOLUhllC. By Pp. xvi + 517. New York and Amst ELECTRONS AND CHEMICAL ROND~NG. H y HARRY U. GRAY. Pp. xvi + 223. New Yorli and 1964. HT:MTDITY ASD MOISTIJRTL MEASUREXENT AS^) Editor-in- IN GASES Editor ROUEKT 1.3. I<USKIN. Pp. xvi -t 687. New York Reinhold I’ublishing Corporation; Idondon Chapman & Hall Ltd. 1966. Price $30.00. Based o n pa$evs pvesen fed at the 1963 [ntevnational Symfiosiz/cm o n H.umidity and Moisture I~IWORPTION SPECTRA IN THE T:LTRAVIOLET AND VISIBLE REGION.CUMULATIVE INU r m (I-V). Edited by DK. L. IANG. Pp. 112. Budapest Akademiai Kiadb. 1965. Price 15s.; $2.00. I?AIIIOISOTOPES AND THEIR INDUSTRTAL APPLICATIONS. By H. PIRRUX. Pp. xiv + 614. &‘ether- lands Philips Technical 1,ibrary. Distributed in the [J.K. and Eire by Cleaver-Hume Press 1,tcl. (Macmillan & Co. Ltd.) London. 1964. Price 72s. MAL METHODS OF ANALYSIS. B y WESLEY WM. WENDLANUT. Pp. x -1 424. New York London and Sydney Interscience Publishers a division of John Wiley & Sons. 1964. Price 124s. Price (cloth) $8.80; (paper) $4.35. )L IS SCIBNCE AN]) IXI)USTKY. Chief ARNOLD WEXLEK. Volume 1. PRI AN13 METHODS OF MIXSLJRING I?TJMII)ITY 1 Vaslzington D.C.80 PUBLICATIONS RECEIVED [Proc. SOC. Anal. Chew. ORGANIC COMPLEXING REAGENTS STRUCTURE BEHAVIOUR AND APPLICATION TO INORGANIC ANALYSIS. By D. D. PERRIN. Pp. xii + 365. New York London and Sydney Interscience Publishers a division of John Wiley & Sons. By LEV IOSIFOVICH MIRKIN I Pp. xx + 731. New York Consultants Bureau. 1964. Price $35.00. PROCEEDINGS OF THE FIRST AUSTRALIAN CONFERENCE ON ELECTROCHEMISTRY. Edited by J. A. FRIEND and F. GUTMANN with the assistance of J . W. HAYES. Pp. xvi + 954. Oxford London Edinburgh New York Paris and Frankfurt Pergamon Press. RUBIDIT~M AND CAESIUM. By F. M. PEREL’MAN. Translated by I<. G. P. TOWNDROW English Translation Edited by R. W. CLARKE. Oxford London Edinburgh New York Paris and Frankfurt Pergamon Press. 1965. Price 60s.KIRK-OTHMER ENCYCLOPEDIA OF CHEMICAL TECHNOLOGY. Volume 5. CHLORINE TO COLORS FOR FOODS DRUGS AND COSMETICS. Edited by HERMAN 1;. MARK JOHN J. MCKETTA JR. DONALD F. OTHMER AND ANTHONY STANDEN. Second Edition. Pp. xiv + 884. New York London and Sydney Interscience Publishers a division of John Wiley & Sons Inc. 1964. Price L16 18s. ; price per volume for subscribers to the complete set of 18 volumes L13. NONLINEAR OPTICS A LECTURE NOTE AND REPRINT VOLUME. By N. BLOEMBERGEN. Pp. xiv 4- 222. New York and Amsterdam W. A. Benjamin Inc. 1965. Price (cloth) $9.90; (paper) $5.45. GLASS-CERAMICS. By P. vli. MCMILLAN. Pp. viii -t. 229. London and New York Academic Press. 1964. Price 47s. 6d.; $7.50. METHODS OF SILICATE ANALYSIS. By H. BENNETT R.Sc. A.R.I.C. and W. G. HAWLEY L.II.1.C.Secoiid Edition. London and New York Academic Press for the British Ceramic Research Association. 1965. Price 63s. and New York Academic Press for the British Ceramic Society. 1964. Price 90s. HANDBOOK OF X-RAY ANALYSIS OF POLYCRYSTALLINE MATERIALS. 1965. Price &lo. Pp. xvi 4- 144. Pp. xvi + 334. SCIENCE OF CERAMICS. Volume 2. Edited by G. H. STEWART. Pp. iv -$- 431. London 1965. Price 84s. Pvoceedings of the second Confevence held undev the auspices of the Bvitish Cevamic Society and the Nedevlandse Kevamische Veveniging at Noovdwijk aan Zee 13-17th May 1963. MACROMOLECULAR STRUCTURE OF RIBONUCLEIC ACIDS. Translation Editor JACOB A. STEKOL. Pp. xii l- 210. New York Reinhold Publishing Company; London Chapman & Hall Ltd. 1964. Price 80s.; $10.00. KAI)IOCHEMISTRY OF CHROMIUM.By J. PIJCK. Pp. vi -t 64. Springfield Virginia TJ.S. Ilepart- ment of Commerce. 1964. Price $0.75. By A. S. SPTRIN. Nucleav Science Seflies N A S-NS-3007. MOIJEIIN SYNTHETIC REACTIONS. By HERBERT 0. HOUSE. Pp. x + 309. New York and Amsterdam W. A. Benjamin Inc. 1965. Price $9.00. FOOD CHEMICALS CODEX. Prepared by the Committee on Specifications of the Food Chemicals Codex of the Food Protection Committee National Academy of Sciences-National liesearch Council. Pp. iii + iv 47 -f 48 63-66 and 343-415 (loose leaf). Washington D.C. U.S. Department of Commerce. Subscription price for all parts including binder $25.00. Imluded in this aye veplacement pages fov the oviginal pages iii and iv and 47 and 48 63-66 avld 343-350. Edited by J . SIRCHIS. Pp. xviii -+ 502. Brussels European Atomic Energy Community (Euratom). 1964. Price Belg. fr. 500; $10.00. Proceedings of a Sywtposium sponsoved by the Radiation Chemistvy and Radioelements Centers of the Univevsities of Bologna Padua and Rome the Italian National Reseavch Council (C.N.R.) and the Euvopean Atomic Enevgy Community (Euvatom). Venice THIN-LAYER CHROMATOGRAPHY A LABORATORY HANDBOOK. Edited by EGON STAHL. Berlin Heidelberg and New York Springer-Verlag; New York and London Part VI. 1965. PREPARATION AND BIO-MEDICAL APPLICATION OF LABELED MOLECULES. AZtgust 23-29 1964. Pp. xvi + 553. Academic Press Inc. Publishers. 1965. Price DM68.

ISSN:0037-9697    

DOI:10.1039/SA965020079b

出版商:RSC    

年代:1965

数据来源: RSC

摘要:

May 19651 NOTICES 81 Notices BRITISH STANDARDS INSTITUTION DRAFT SPECIFICATION A FEW copies of the following draft specification issued for comment only are available to members of the Society and can be obtained from the Secretary The Society for Analytical Chemistry 14 Belgrave Square London S.W.I. Draft Specification prepared by Sub-committee N/67/2€-Emulsifiers etc. in Food. D65/3280-Draft R.S. Specification for Stearyl Tartrate for Use in Foodstuffs. PURE AND APPLIED CHEMISTRY THE OFFICIAL JOURNAL OF THE INTERNATIONAL UNION OF PURE ilND APPLIED CHEMISTRY VOLUME 10 No. 1 1965 THIS issue contains the Plenary Lectures presented at the VILIth International Conference on Coordination Chemistry held in Vienna September 7th to l l t h 1964. In addition it contains reports prepared by the Commission for the Determination of Trace Elements in Food on “Determination of Lead Content of Foodstuffs” and “Deter- mination of Mercury Content of Foodstuffs.” Pure and A$pZied Chemistry is published irregularly four issues per volume at ,E6 ($18.00) per volume.Reprints may be purchased; all enquiries should be addressed to the publishers Rutterworths 4-5 Bell Yard Temple Bar London W.C.2. THE CHEMICAL SOCIETY IXESElZRCH FUND THE Research Fund of the Chemical Society provides grants for the assistance of research in all branches of Chemistry. Applications for grants will be considered in December 1965 and should be submitted on the appropriate form not later than 1st November 1965. The total amount available for distribution is approximately L1 100 and applications from Fellows will receive prior consideration.Forms of application together with the regulations governing the award of grants may be obtained from the General Secretary of the Chemical Society Burlington House London W. I . AUTUMN MEETING 1965 THE Chemical Society is to hold a meeting in Nottingham on September 21st and 22nd 1965 primarily to enable Fellows to hear to present and to discuss brief but important communications on any aspect of chemistry. At the Anniversary Meetings in April only a limited opportunity for the presentation of communications was available ; much more time will be available at Nottingham. Although parallel sessions will be arranged there will not be simultaneous sessions in one branch of chemistry. Fellows who wish to make a communication should apply not later than Thursday July lst on forms available from the General Secretary The Chemical Society Burlington House London W.1. In addition to the communications special invited lectures will be given as follows Organic Chemistry Professor D. Arigoni (Technical University Zurich) ; Inorganic Chemistry Professor Dr. E. 0. Fischer (Munich University) ; Physical Chemistry Professor P. Goldfinger (Free University of Brussels). Communications on any aspect of chemistry may be submitted. INTERNATIONAX SYMPOSIUM ON MICROCHEMICAL TECHNIQUES THE Pennsylvania State University is conducting this 1965 Symposium at University Park Pennsylvania U.S.A. The programme is being organised by the American Microchemical Society with the sponsorship of the International Union of Pure and Applied Chemistry. AUGUST 22ND TO 2 7 ~ ~ 1965 82 NOTICES [Proc.SOC. A~znl. Chem. The programme will comprise plenary lectures original papers seminars a commer- cial exhibition technical films and social events. Further details may be obtained from Mr. Howard J. Francis jun. Pensalt Chemicals Corp. 900 First Avenue King of Prussia Pennsylvania U .S .A. MIDLANDS SECTION AND SPECIAL TECHKIQUES GROUP JOINT Meetings of the Midlands Section and the Special Techniques Group of the Society for Analytical Chemistry the Birmingham and Midlands Section of the Royal Institute of Chemistry and the Midlands Section of the Society for Chemical Industry will be held in the Chemistry Department of the University of Birmingham as follows- Wednesday September 15th 1965 on “Thermometric Titrimetry.” Lecturers will include Mr.L. S. Bark Dr. P. T. Priestley and Mr. VV. S. Sebborn. Wednesday March 30th L966 1-day Symposium on “Nuclear Magnetic Resonance and Lecturers will include Dr. J. EL Recconsall Dr. J. K. Brown Dr. I<. Richards Anyone wishing to attend either of these Meetings or wishing to receive further information should communicate with Mr. M. L. Richardson A.R.I.C A.C.T.. (JSirm.) Hon. Secretary Midlands Section The Society for Analytical Chemistry c/o John & E. Sturge Ltd. Lifford Chemical Works Iifford Lane Kings Norton Birmingham 30. Electron Spin Resonance.” F.R.S. Dr. J . A. Smith Dr. L. F. Thomas and Dr. D. H. Whiffen. CANADIAN ASSOCIATION FOR APPLIED SPECTROSCOPY TWELFTH OTTAWA SYMPOSIUM ON APPLIED SPECTROSCOPY THE Twelfth Ottawa Symposium sponsored by the Canadian Association for Applied Spectro- scopy will be held in Ottawa from October 18th to 20th 1965.Papers are invited on all fields of spectroscopy including investigations in which novel applications of spectroscopy were used and applications of other techniques to problems in spectroscopy such as electronic computers or high-speed photography. Titles and brief abstracts of papers should be submitted before June 15th 1965 to Mr I<. V. Baker Chairman Programme Committee Twelfth Ottawa Symposium on Applied Spectroscopy Aluminium Company of Canada Ltd. Arvida Quebec. THIRD INTERNATIONAL MEETING OF CHROMATOGRAPHY AND OF IMMEDIATE SEPARATION THE Greek Chemists Association in co-operation with the Association for the Development of Spectrographic Methods (G.A.M.S. France) is organising the 3rd International Meeting under the title Journkes Internationales de la Skparation Imm4diate et de la Chromatographie. The meeting will be held in Athens from September 19th to 25th 1965. Further details may be obtained from the Chairman of the meeting Dr. G. Parissakis Professor of the Technical University of Athens 42 Patission Str. Athens Greece or from G.A.M.S. 1 Rue Gaston Boissier Paris-W France. ATHENS SEPTEMBER 19TH-%TH 1965

ISSN:0037-9697    

DOI:10.1039/SA9650200081

出版商:RSC    

年代:1965

数据来源: RSC

摘要:

NOTICES [Proc. Soc. A~znl. Chem. Corrigenda THE word “Copper” should be inserted before “Cobalt” in the title of the paper by K. Carson and E. G. Walliczek both in the list of papers accepted for the SAC Conference 1965 (March issue of Proceediqp p. 37) and in the provisional programme for the Conference (April issue pp. 66-68) Session A morning of Thursday July 22nd 3rd title. The title should be “The Determination of Trace Amounts of Silver with Diphenylthiocarbazone in High-purity Copper Cobalt Lead Nickel Zinc and Other Metallurgical Products.” The Joint Discussion Meeting of the Western Section and the Thin-layer Chromatography Group held in Cardiff in the evening of February 19th 1965 was under the Chairmanship of Dr. F. H’. Pollard and not Mr. E. A. Hontoir as reported in the April issue of Proceedings (P. 42) *

ISSN:0037-9697    

DOI:10.1039/SA9650200082

出版商:RSC    

年代:1965

数据来源: RSC