ANALAO 105 (1255) 969-1008 (1980)ISSN 0003-2654October 1980THE ANALYSTTHE ANALYTICAL JOURNAL OF THE ROYAL SOCIETY OF CHEMISTRYCONTENTS929 Polarographic Behaviour and Analysis of Some Azo Dyes o f BiologicalSignificance-J. P. Hart and W. Franklin Smyth939 A New Approach t o the Quantitative Analysis of Overlapping Anodic-strippingVoltammograms-Juei H. Liu944 A New Type of Biological Reference Material for Multi-element Analysis-the Fungus Penicillium ochro-chloron ATCC 36741---Miwako Suzuki, YukikoDokiya, Sunao Yarnazaki and Shozo Toda950 Spectrophotometric Determination of Hydrogen Peroxide Using PotassiumTitanium(1V) Oxalate-Robin M. Sellers955 Improved Extraction Method for the Spectrophotornetric Determination o fTrace Amounts of Boron i n River Water w i t h 1,8-C)ihydroxynaphthalene-4-sulphonic Acid and Removal of the Excess of Retagent-Takashi Korenaga,Shoji Motornizu and Kyoji TBeiPyridine-2-acetaldehyde Salicyloylhydrazone as an Analytical Reagent and i t sApplication t o the Determination of Vanadium-M.Garcia-Vargas, M.Gallego and M. de la GuardiaDetermination o f Cyanide in Animal Feeding Stuffs-J. R. Harris, G. H. J. Merson,M. J. Hardy and D. J. Curtis965974SHORT PAPERS981 A Simple Non-dispersive Atomic-fluorescence Spectrometer for MercuryDetermination, Using Cold-vapour Generation-R. C. Hutton and B. Preston984 Determination of Sulphide i n Flooded Acid - Sulphate Soils by an IndirectAtomic-absorption Spectrophotometric Method-Rarnesh C. Ray, P. K.Nayar, A.K. Misra and N. SethunathanDetermination o f Diuron Residues i n Soil: Comparison o f Determinations byHigh-performance Liquid Chromatography and Gas - Liquid Chromato-graphy-E. G. CotterillRapid Extraction o f Some Persistent Chlorinated Hydrocarbons from BiologicalMaterial w i t h Low Fat Content-Gunnar Norheirn aiid Elisabet Mo BklandDetermination o f the Anthelmintic Levamisole i n Plasma and Gastro-intestinalFluids by High-performance Liquid Chromatography-S. Marriner, E. A.Galbraith and J. A. Bogan996 Spectrophotometric Micro-determination of Silver(l) and Iodide lons-Sudarsan Barua, B. S. Garg, R. P. Singh and lshwar Singh998 Rapid Gas - Liquid Chromatographic Determination of Cotinine in BiologicalFluids-C. Feyerabend and M. A. H.Russell987990993C 0 M M U N I CAT1 0 NLimit of Detection in Analysis w i t h Ion-selective Electrodes-Derek Midgley 10021006 Book ReviewsSummaries o f Papers in this Issue-Pages iv, v, vii, x, x i iPrinted by Heffers Printers Ltd Cambridge EnglandEntered as Second Class at New York USA. Post OfficSelected Annual Reviewsof the Analytical SciencesVolume 4CONTENTS'Advances in Voltammetric Techniques,' byB. Fleet and R D. Jee'High-frequency Electrodeless PlasmaSpectrometry,' by B. L. SharpPp. vi f 73 f 9.50ISBN 0 85990 204 8RSC Members' mice f4.00Orders should be sent direct, with remittance, orthrough your usual bookseller to-THE ROYAL SOCIETY OF CHEMISTRYDistribution Centre,Blackhorse Road, Letchworth,Herts. SG6 1 HN, EnglandPATENTSB r i t i s h Patent No.1356 512.Contractor Mixing Device.Owner desires commercial exploitation on reasonable terms bylicense or sale. Inquiries, Fitzpatricks, Chartered Patent Agents,48 St. Vincent Street, Glasgow G 2 5TT, and Warwick House,Warwick Court, London WC1R 5DJ.B r i t i s h Patent No. I490 137.Chemical Compositions Suitable for Use as InsectRepellents.Owner desires commercial exploitation on reasonable terms bylicense or sale. Inquiries, Fitzpatricks, Chartered Patent Agents,48 St. Vincent Street, Glasgow G2 5TT, and U'arwick House,Warwick Court, London \\'ClR 5DJ.B r i t i s h Patent No. 1 346 389.An Anti-Adhesive Composition.Owner desires commercial exploitation on reasonable terms bylicense or sale.Inquiries Fitzpatricks Chartered Patent Agents48 St. Vincent Street, Clasgow G2 6TT, and Warwick House:Warwick Court, London WClR 5DJ.Notice to SubscribersSubscriptions for The Analyst, Analytical Abstracts and Analytical Proceedingsshould be sent to:The Royal Society of Chemistry, Distribution Centre,Blackhorse Road, Letchworth, Herts., SG6 1 HN, EnglandRates for 1980 (including indexes)U K/ Rest ofEire USA WorldThe Analyst, and Analytical Abstracts . , .. .... .. .. f120 $280 f126The Analyst, and Analytical Abstracts printed on one side of the paper f 129 $300 f135The Analyst, Analytical Abstracts, and Analytical Proceedings . . . . f136 $310 f143The Ana/yst, Analytical Abstracts printed on one side of the paper . . . . . . f145 $335 f152 and Analytical Proceedings . . . . ..Analytical Abstracts . . .. . . * . . . . . . . f92.50 $215 f97Analytical Abstracts printed on one side of the paper . . .. .. flOl $235 f106Subscriptions are not accepted for The Ana/yst and/or for Analytical Proceedings alon