ANALAO 1 16(6) 549-680 (1 991 )The AnalystJune 199154956957358 158558959560 160560961562 162562763 1641647653657663667The Analytical Journal of The Royal Society of ChemistryCONTENTSCadmium: Toxicology and Analysis. A Review-Kevin Robards, Paul WorsfoldAutomated Enzyme Packed-bed System for the Determination of Vitamin C in Foodstuffs-Simon Daily, Susan J.Armfield, Barry G. D. Haggett, Mark E. A. DownsDirect Reductive Amperometric Determination of Nitrate at a Copper Electrode Formed In Situ in a Capillary-fill SensorDevice-Arnold G. Fogg, S. Paul Scullion, Tony E. Edmonds, Brian J. BirchEvaluation of Poly(viny1idene chloride) as a Matrix for Polymer Membrane Ion-selective Electrodes-Vanessa J.Wotring, Patrick K.Prince, Leonidas G. BachasElectroanalysis for Organotin in Natural Waters Including Sea-water by Cathodic Stripping Voltammetry-ConstantM. G. van den Berg, Shaukat H. KhanMechanistic Study of Fluoride Ion Sensors-Werner Moritz, Lothar MullerAutomated Determination of Sulphide by Gas-phase Molecular Absorption Spectrometry-Toyin A. Arowolo,Malcolm S. CresserInductively Coupled Plasma Atomic Emission Spectrometry for the Analysis of Soil Extracts Prepared on Ion-exchangeResins-Loku L. W. Somasiri, Albert Birnie, Anthony C. EdwardsDetermination of Trace Amounts of Metalloprotein Species in Marine Mussel Samples by High-performance LiquidChromatography With Inductively Coupled Plasma Atomic Emission Spectrometric Detection-Am brogioMazzucotelli, Aldo Viarengo, Laura Canesi, Enrica Ponzano, Paola Rivaro4-(Aminosulphonyl)-2,1,3-benzoxadiazole Derivatives as Pre-column Fluorogenic Tagging Reagents for CarboxylicAcids in High-performance Liquid Chromatography-Toshimasa Toyo‘oka, Mumio Ishibashi, Yasushi Takeda,Kazuhiro lmaiReversed-phase High-performance Liquid Chromatographic Separation of Niobium(v) and Tantalum(v) by Pre-columnChelation With 4-(2-Pyridylazo)resorcinol-Su hjen Jane Tsa i, Yish iuan LeeLiquid Chromatographic Behaviour of Chelates of Vanadium(v), Copper(it), Cobalt(iii) and Chromium(iit) With2-(3,5-Dibromo-2-pyridylazo)diethylaminophenol-Yi Zhao, Chengguang FuModified Ninhydrin Spray Reagent for the Identification of Amino Acids on Thin-layer Chromatography Plates-Subrata Laskar, Utpal Bhattacharya, Bidyut BasakUltrasensitive Determination of Europium Using Microsecond Time-resolved Spectrofluorimetry-Theodore K.Christopoulos, Eleftherios P.DiamandisSelf-indicating Flow Visible Spectrophotometric Titrations in a Variable-volume Tank Reactor-Francis E. Powell,Arnold G. FoggSpectrophotometric Determination of Ascorbic Acid in Pharmaceuticals by Background Correction and FlowInjection-Krishna K. Verma, Archana Jain, Archana Verma, Anupama ChaurasiaSpectrophotometric Flow Injection Determination of Trace Amounts of Thiocyanate Based on Its Reaction With2-( 5-Bromo-2-pyridylazo)-5-diethylaminophenol and Dichromate: Assay of the Thiocyanate Level in Saliva FromSmokers and Non-smokers-Anders Broe Bendtsen, Elo Harald HansenKinetic Determination of Iodide in Pharmaceutical and Food Samples-Ma.Soledad Garcia, Concepcion Sanchez-Pedrefio, Ma. Isabel Albero, Catalina SanchezUse of Lissamine Green B as a Spectrophotometric Reagent for the Determination of Low Residuals of ChlorineDioxide-Bar ry Ch iswel I, Kelvin R. O’Hal loranDetermination of Trace Amounts of Gallium, Indium and Thallium by Successive Titrations Using Semi-xylenol OrangeWith Spectrophotometric and/or Visual End-point Indication-Medhat Abd El-Hamied Hafez, Amin M. A. Abdallah,Tarek M. Abd El-Fatah WahdanExtraction-Spectrophotometric Determination of Nitrite Using 1-Aminonaphthalene-2-sulphonic Acid-RachanaKaveeshwar, Lata Cherian, V. K. Guptacontinued inside back coverTypeset and printed by Black Bear Press Limited, Cambridge, Englan671 COMMUNICATIONWater-soluble Copolymers: A New Class of Media for Fluorescence and Phosphorescence Analyses in AqueousSystems?-Ian Soutar, Linda SwansonCambridge CB4 4WF, UK.RSC Members should obtain members prices and order from :The Membership Affairs Department at the Cambridge address above.InformationServices675 BOOK REVIEWS679 CUMULATIVE AUTHOR INDEXThe--Royal Society of Chemistry - The First 150 YearsBy: David H.WhiffenThis interesting new book provides a historical review from 1841 to 1991 of the Royal Society of Chemistry and the Societies from which it wasformed.Contents:Historical Prologue.1941-51 by D. H. Hey.The Chemical Society.The Royal Society of Chemistry.Premises.Publications.The Nottingham Centre.Awards and Meetings.RIC Matters and Their Continuation in RSC.Finance.Epilogue.Appendix.Bibliography of Other Historical Volumes.Subject Index.Name Index.Hardcover Approximately 270 pagesPrice: f 14.95ISBN: 0 85186 294 2Due Early 1991