ANALAO 104 (1 242) 801 -896 (1 979)ISSN 0003-2654September 197980181 2822831837846853860865THE ANALYSTTHE ANALYTICAL JOURNAL OF THE CHEMICAL SOCIETYCONTENTSIonic Polymerisation as a Means o f End-point Indication in Non-aqueous Thermo-metric Titrimetry. Part X. Acrylonitrile Indicator Reactions in theDetermination of Acids-E. J. Greenhow and L. A. Dajer de TorrijosIdentification and Determination o f Titanium Sulphide and CarbosulphideCompounds in Steel-W. R. Bandi and George KrapfCorrection System f o r Spectroscopic Determination o f Trace Amounts o fCadmium Using the Atomic Faraday Effect w i t h Electrothermal Atomisation-K. Kitagawa, T. Koyama and (the late) T. TakeuchiDetermination of Aluminium, Calcium, Iron and Magnesium in Sewages andSewage Effluent by a Rapid Electrothermal Atomic-absorption Spectro-scopic Method-M.J. T. Carrondo, J. N. Lester and R. PerryDetermination o f Nitrate in Raw, Potable and Waste Waters by UltravioletSpectrophotometry-P. J. Rennie, A. M. Sumner and F. B. BasketterCombined Gas Chromatography - Chemical-ionisation Mass Spectrometry o fSome Phthalate Esters-J. B. AddisonPolarographic Determination of Some Linear Alkylbenzene Sulphonates-J. P.Hart, W. Franklin Smyth and B. J. BirchDetermination o f the Amino Acid Contents o f Coalworkers' Lungs After Correc-t i o n f o r Blood, Fat, Dust and Collagen-Roy LoxleyNaphthidines and o-Dianisidine as Redox Indicators in Titrations rwith N-Bromosuccinimide-H. Sanke Gowda, R. Shakunthala and U. SubrahmanyaSHORT PAPERS873 Non-aqueous Titration of Substituted N-o-Tolylbenzohydroxamic Acids-Y.K.Agrawal875 Trace Determination of Carbonyl Compounds in Air by Gas Chromatography o ftheir 2,4-Dinitrophenylhydrazones-R. A. Smith and 1. Drummond878 Effect o f Ammonium Nitrate on the Gas-chromatographic Determination o fSome Pesticide Residues in Soils-E. G. Cotterill880 Spectrophotometric Determination of Iodide Ion Using Palladium andr2-Nitroso-5-diethylaminophenol-Shoichi Hamada, Shoji Motomizu and Kyoji TBei883 Electroanalytical Study o f Zinc - L-Citrulline Complex a t a Dropping-mercuryElectrode-K. M. Suyan, S. K. Shah and C. M. GuptaCO M M U N ICATIONSDetermination of Trace Amounts of Sulphate by Molecular Emission CavityAnalysis Using a Vaporisation System-S.L. Bogdanski, lssam M. A. Shakir,W. I . Stephen and Alan Townshend890 Novel Reagent f o r the Determination o f Atmospheric Isocyanate MonomerConcentrations-Horace L. Hardy and Ronald F. Walker892 Book Reviews886Summaries of Papers in this lssue-Pages iv, vi, vii, x, xii, xivPrinted by Heffers Printers Ltd Cambridge EnglandEntered as Second Class at New York, USA, Post Offic“ A N A L O I D ”COMPRESSED CHEMICALREAGENTSoffer a saving in the use of lab-oratory chemicals. A range of over50 chemicals includes Oxidizingand Reducing Agents, Reagents forColorimetric Analysis and Indicatorsfor Complexometric Titrations.For full particulars send for ListNO. 458 to:-RIDSDALE & CO. LTD.Newham Hall, Newby,Middlesbrough,Cleveland TS8 9EAortelephone Middlesbrough 31 721 6CLASSIFIED ADVERT1 SEMENTSThe Rate, for Classified Advertisements isL2.50 per single column centimetre.Box Numbers are charged a n extra 6op.Deadline for classified copy i s 20th of themonth preceding month of issue.All space orders, copy instructions andenquiries should be addressed toThe A dvertisement Department,The Chemical Society, Burlington House,Piccadilly, London WIV oBN.Telephone 01-734 9864 Telex 268001FOR SALE1.Analytical Abstracts 1954-1972 (bound).2 . Analyst 1946-1974 (bound).Telephone Nottingham 256398.1975-present (unbound).Notice to SubscribersFor information on subscription rates for The Analyst, AnalyticalAbstracts and Proceedings write to:The Marketing Department,The Chemical Society,Burlington House,London WIV OBN, England.Telephone 01 -734 9864.Telex: 268001.Orders and claims for missing issues should be sent to:The Chemical Society, Distribution Centre,Blackhorse Road, Letchworth, Herts., SG6 1 HN, Englan