x THE ANALYST [February, 1973IIANALYTICAL SCIENCESMONOGRAPHSA New SeriesBadge of The Society for Analytical ChemistryThe Society for Analytical Chemistry’s primary objects are toencourage, assist and extend the knowledge and study of analyticalchemistry. To this end the publication of journals, reports and bookshas always been recognised as an essential function. This month theSAC publishes the f i r s t in a new series of Monographs -H igh-Precision Titrimetryby C. Woodward and H. N. RedmanImperial Chemical Industries Limited (Agricultural Division)BRIEF CONTENTS:IntroductionVisual Titrations, with sections on Apparatus, Standard Substances and their preparationInstrumental Methods, with sections on Photometric Titrations, Electrometric Titrationsand assay, and Standard Solutions.and Miscellaneous Techniques.References t o the literature of high-precision titrimetry.Pp.viii +63Price f2-50Members of The Chemical Society (which includes members of the SAC) maybuy a personal copy a t the special price of f2.00 provided they state the fact ofsuch membership on their order and send with it a remittance for the correctamount made out t o “Society for Analytical Chemistry.”This Monograph i s now available from-THE SOCIETY FOR ANALYTICAL CHEMISTRY(Book Depart men t)9/10 SAVILE Row, LONDON WIX IAFebruary, 19731 THE ANALYST xiNew Chemistry Titles from The Butterworth GroupCoordination ChemistryExperimental Methods Kalrpzhn BurgThe object of this book is to provide a convenient and authoritative gnido to tho soloctionof suitable experimental methods for solving specific problems in coordination chemistq.The theoretical principles of the various methods are discussed only so far as is necessaryfor an appreciation of their scope; their application in coordination chemistry is verythoroughly covered, with numerous carefully selected examples from tho recent litoraturo.1973 370 p p 0 408 70205 2 $5.00Laboratory Techniques in Food AnalysisD.PearsonThis volume provides an introduction to the basic laboratory t,c~chniqii~s of food analysisfor students and technicians. A suitable course book for stixtlcnts, itJ is also a valuahlorofercnce for bench workers in industry or public health contml. 1 tJ is o m of a sorios ofbooks on laboratory techniques.1973 328 p p illustrated 0 408 70424 1 g6.50IUPAC. Analytical Chemistry - 3(Brasov, 1971) Edited by P.Gh. ZugravescuThe book includes nine of the Plenary Lectures presented a t the Third National Con-ference on Analytical Chemistry held in Brasov, 22-26 September, 1971. Thoso papersdealt with Electrochemical Analysis, Spectrometric Analysis, Radiochomical Analyvis,Chromatography and Organic Analysis. It will be of intorost to postgratluato~ inchemistry, to researchers and a must for university librarics.I972 152 p p illustrated 0 408 70389 X $4.30 or $12.90IUPAC. Chemistry of Natural Products - VIII(New Delhi, 1972) Edited by T. R. GovindachariThese are the plenary lectures presented a t the Eighth International Symposium on thoChomistry of Natural Products held in New Delhi, India in February 1972.1973 184 p p illustrated 0 408 70437 3 €5.25 or $15.75IUPAC.Dissociation Constants of OrganicBase in Aqueous SolutionSupplement 1972 D. D. PerrinDesigned to be used in conjunction with the original table, which coverod tho literatureup to the end of 1961. The range of this table is more extensive than that of the original,notably because of the inclusion of Russian journals.1972 1160 p p 0 408 70408 X $22.50 or $67.50I UPAC publications are available in the USA and Canada from Crane, Russak & Co.Inc., 52 Vanderbilt Avenue, New Yo&, N Y 10017Available through any bookseller, or from the publisher.The Butterworth Group88 Kingsway, London WC2B 6ABShowroom and trade counter: 4-5 Bell Yard, WCxii SUMMARIES OF PAPERS IN THIS ISSUEThin-layer Chromatography of Simple Urea - Formaldehyde -Methanol Reaction ProductsPart 11.Quantitative AspectsA thin-layer chromatographic method for the determination o f urea,monomethylolurea and dimethylolurea in urea - formaldehyde resins isdescribed. The resin is treated with methanolic boron trifluoridc, wherebythe methylol compounds are quantitatively converted into their respectivemethyl ethers, Subsequent application of chromatography on silica gel platesthat have been previously treated with ammonia vapour in order to preventreaction of the urea derivatives results in the effective separation of thecomponents of low relative molecular mass, thus allowing their concentrationsto be determined.Examples are given illustrating the change in concen-tration of urea derivatives of low relative molecular mass with time in urea -formaldehyde formulations.P. R. LUDLAMThe Borden Chemical Company (U.K.) Limited, North Saddesley, Southampton,SO5 9ZB.Analyst, 1973, 98, 116-121.LFebruary, 1073A Gas-chromatographic Method for the Determination ofLow Concentrations of Acrylic Acid in Mixtures ofC, to C, Fatty Acids in Biological MaterialsThe presence of acrylic acid in mixtures of short-chain (C, to C,) fattyacids can be determined by gas chromatography by using a compositc columntechnique. By varying the proportions of the total column length occupiedby non-polar and polar liquid phases, the acrylic acid peak could be “moved”to a predetermined position on the chromatogram and complete separationfrom the other acids could be achieved.Suitable placing of the peak enabledthe concentration of acrylic acid to be accurately and quickly determined.R. C. NOBLE and J. W. CZERKAWSKIHannah Research Institute, Ayr, Scotland, KA6 5HL.Analyst, 1973, 98, 122-126.Automatic Logging and Processing of AutoAnalyzer Peaks withan Off-line, Time-sharing ComputerA complete data acquisition and processing system for use with TechniconAutoAnalyzers is described. The system involves the use of a Solartron Data-logger and a teleprinter terminal connected to the Honeywell G265 Time-Sharing Computer Service by a Post Office telephone line.AutoAnalyzer recorders are fitted with re-transmitting slide-wires toproduce voltages that are proportional to peak height. Laboratory-builtcircuits detect the occurrence of peaks and generate digitise-command signalsto the logging system.Peak-height voltages are output to a tape punchand a printer. A manual-entry unit enables coding data to be punched a t thebeginning of each tape.Ten AutoAnalyzer channels can be monitored simultaneously. Thechannel of origin of each value is identified by a number that precedeseach peak voltage.The computer is used to process the raw data generated by the Auto-Analyzers and datalogger. The limited area of core store available to eachcomputer user necessitates the use of several programs, which are calledsequentially into the core store, to process the data.The programs werewritten in the BASIC language by members of the authors’ Department.J. D. CAISEY and B. D. RIORDANToxicology Department, Glaxo Research Ltd., Fulmer, Buckingharnshire.Analyst, 1973, 98, 126-132February, 19731 THE ANALYST xiiiANNUAL REPORTSONANALYTICAL ATOMICSPECTROSCOPYVolume 1, 1 9 1THIS comprehensive and critical reportof developments in analytical atomicspectroscopy has been compiled frommore than lo00 reports received fromworld-wide correspondents who areinternationally recognised authorities inthe field and who constitute the Editor-ial Board. In addition to surveyingdevelopments throughout the worldpublished in national or internationaljournals, a particular aim has been toinclude less widely accessible reportsfrom local, national and internationalsymposia and conferences concernedwith atomic spectroscopy.Volume 1 covers the year 1971.204 pagesPrice E O OMembers of The Chemical Society may buypersonal copies at the special price of E3-00.Obtainable from-THE SOCIETY FOR ANALYTICALCHEMISTRY,(Book Department),9/10 Savile Row, London, W1X IAFSPECIALIST ABSTRACTJOURNALSpublished bySCIENCE AND TECHNOLOGY AGENCYAtomic Absorption and FlameEmission Spectroscopy AbstractsVol.5, 1973, bimonthly f24X-Ray Fluorescence SpectrometryAbstractsVol. 4, 1973, quarterly €24Thin-Layer Chromatography AbstractsVol. 3, 1973, bimonthly €24Gas Chromatography-MassSpectrometry AbstractsVol.4, 1973, quarterly €37Nuclear Magnetic ResonanceSpectrometry AbstractsVol. 3, 1973, bimonthly €30Laser-Raman Spectroscopy AbstractsVol. 2, 1973, quarterly 230X-Ray Diffraction AbstractsVol. 1-2, 1973, quarterly €30Neutron Activation Analysis AbstractsVol. 2-3, 1973, quarterly €30Electron Microscopy AbstractsVol. 1, 1973, quarterly €30Liquid Chromatography AbstractsVol. 1, 1973, quarterly f 3 0Electron Spin Resonance SpectroscopyAbstractsVol. 1, 1973, quarterly €30Sample copies on request from:SCIENCE AND TECHNOLOGY AGENCY,3 DYERS BUILDINGS, HOLBORN,LONDON, E.C.l, ENGLAND01 -405 932xiv SUMMARIES OF PAPERS I N THIS ISSUE [February, 1973Non- aqueous Atomic- absorption Spectrophotometric Analysis ofOrganonickel Complexes by a Ligand Exchange MethodA procedure is described in which diethylammonium diethyldithiocar-bamate is used to complex nickel in a mixed organic solvent, thus eliminatinginterferences due to different bonding.The interferences can also be removedby using a nitrous oxide - acetylene flame and a method has been devisedthat requires the use of only a single solvent for dissolution. The ligandexchange method should have wide application in the elimination of bondinginterferences.M. A. LEONARD and W. J. SWINDALLDepartment of Analytical Chemistry, The Queen's University of Belfast, Belfast,BT9 5AG, Northern Ireland.Analyst, 1973, 98, 133-136.A Comparison of a Spectrophotometric (Quercetin) Method andan Atomic-absorption Method for the Determination of Tin in FoodProcedures for the determination of tin in food, which involve a spectro-photometric method (with the quercetin - tin complex) and an atomic-absorption method, are described.The precision of the complete methodsand of the individual analytical steps required is evaluated, and the para-meters that influence the precision are discussed.It is concluded that while the spectrophotometric method is to bepreferred for very low tin concentrations, for instance, residues of organotincompounds, the two methods are equally useful for the determination oftin in concentrations normally found in canned foods. With both methodsrecoveries of added tin do not deviate significantly from 100 per cent. withintheir respective working ranges.ASE ENGBERGDepartment of Pesticides, Food Additives and Contaminants, National Food Institute,Copenhagen, Denmark.Analyst, 1973, 98, 137-145.The Spectrophotometric Determination of Nitrofurantoinin Blood and UrineShort PaperJANE HARRISON, D. A. LEWIS and R. J. ANCILLPharmacology Group, School of Pharmacy, University of Bath, Bath, Somerset,BA2 7AY.Analyst, 1973, 98, 146.A Method for the Detection of Microgram Amounts ofHydroxamic AcidsA rapid and simple method for the detection of small amounts ofhydroxamic acids is described. The chloroform-soluble, violet-colouredvanadium complex formed between vanadium and the hydroxamic acidsallows the detection of as little as 10 to 20 p g of hydroxamic acid in one dropof sample solution.Y. K. AGRAWALDepartment of Chemistry, Indian Institute of Technology, Powai, Bombay-76, India.Analyst, 1973, 98, 147-148