ANALAO 108 (1 287) 649-776 (1 983) June 198364968569170171 271 77227287337 38742748754757759763766769THE ANALYSTTHE ANALYTICAL JOURNAL OF THE ROYAL SOCIETY OF CHEMISTRYCONTENTSAuger Techniques in Analytical Chemistry.Scanning Potential Stopped-rotation Voltammetry-Joseph Wang and Bassam A. FreihaDifferential-pulse Polarographic Monitoring o f Permitted Synthetic Food ColouringMatters and Ascorbic Acid in Accelerated Light Degradation Studies and theSpectrophotometric Determination o f the Ammonia and Simpler Amines Formed-Arnold G. Fogg and Abdulhadi M. SummanPotentiometric Determination o f Sulphite by Use o f Mercury(1) Chloride - Mercury(l1)Sulphide Electrodes in Flow Injection Analysis and in Air-gap Electrodes-GeoffreyB. Marshall and Derek MidgleySynthetic Inorganic lon-exchange Materials. Part XXXII.Studies on an Araldite-based Membrane of Crystalline Antimonic(V) Acid as a Nitrate lon-selectiveElectrode-Sushma Agrawal and Mitsuo AbeUse o f an Argon - Nitrogen Inductively Coupled Plasma for the Analysis of AluminiumAlloys Subsequent t o Alkali Dissolution-JosB A. C. Broekaert, Franz Leis and GungorDinqlerAnalytical Errors Associated with Trace Element Determination in Freshwater Particu-late M atter by Atomic-absorption Spectroscopy-Renato Baudo, Gaetano Galantiand Pier Giorgio VariniEffects o f Temperature Variation on the Zero, Second and Fourth Derivative Ultra-violet Absorption Spectra of Benzenoid Drugs-Alexander G. DavidsonFluorimetric Determination o f Trace Amounts o f Gold as an lon-association Complexw i t h 2-Phenylbenzo[8,9]quinolizino[4,5,6,7-fe~]phenanthridinylium Perchlorate-Tomes PBrez-Ruiz, Concepci6n SBnchez-PedreAo, Joaquin A.OrtuAo and Pedro Molina-BuendiaPreparation of Fatty Acid Methyl Esters from Olive Oil and Other Vegetable Oils UsingAqueous Hydrochloric Acid - Methanol-Nikolaos B. Kyriakidis and George Dionyso-poulosModified Gas - Liquid Chromatographic Method for Determining Bromide/TotalBromine in Foodstuffs and Soils-John A. Roughan, Patricia A. Roughan and John P. G.WilkinsInter-laboratory Calibration f o r Pesticide Analysis in South Africa-Louis P. van Dyk,Laurraine Lotter, Pieter R. de Beer, Andre de Klerk, Awie J. Viljoen and Susan M. PrinslooA Review-J. C.RiviereSHORT PAPERSSpectrophotometric Determination o f Exchangeable Calcium in Soils by Chloro-Histochemical Demonstration o f Collagen in Comminuted Meat Products-F. OlgaEvaluation o f the Determination of High Levels of Total Cadmium in Foodstuffs UsingFurther Studies on the Recovery of Iodine as lodine-125 After Alkaline Ashing Prior tophosphonazo-mA-Qiu Xing-chu, Zhang Yu-sheng and Zhu Ying-quanFlint and Barry M. FirthFlame Atomic-absorption Spectrophotometric Measurement-Dorothy DellarAssay-G. Bryan BellingCOMMUNICATIONCortisol Antibody Electrode-M. Y. Keating and G. A. RechnitzBOOK REVIEWSSummaries o f Papers in this hue-Pages iv, v, vi, vii, viii, ix, x, xiiPrinted by Heffers Printers Ltd Cambridge EnglandEntered as Second Class at New York.USA, Post OfficSITUATIONS VACANTANALYSTWith at least several yearsexperience of analyticalprocedures in the pharmaceuticalindustry, required for Company inNorth London. The successfulapplicant will be expected tocontrol a small technical staff andreport to the Senior Analyst.Application Forms from theSecretary, Biorex LaboratoriesLimited, Biorex House,Canonbury Villas,London NI 2HB.A201 for further information. See page xiv“ A N A L O I D ”COMPRESSED ANALYTICALREAGENTSoffer a saving in the use of lab-oratory chemicals. A range of over50 chemicals includes Oxidizingand Reducing Agents, Reagents forPhotometric Analysis and Indicatorsfor Complexometric Titrations.For full particulars send for ListNO.513 to:-RIDSDALE b. CO. LTD.Newham Hall, Newby,Middlesbrough,Cleveland TS8 9EAor telephone Middlesbrough317216(Telex: 587765 BASRID)Annual Reports on AnalyticalAtomic Spectroscopy Vol. 11Edited by M. S. Cresser and 6. L. SharpThis volume reports on current developmentsin all branches of analytical atomic emission,absorption a nd f 1 uorescence spectroscopywith references to papers published andlectures presented during 1981. Much of theinformation is in tabular form for ease ofreference.Brief ContentsAtomization and ExcitationArcs, Sparks, Lasers and Low-pressure Dis-charges; Plasmas; Flames; ElectrothermalAtomization; Vapour Generation;InstrumentationLight Sources; Optics; Detector Systems;Instrument Automation; Complete Instru-ments; New Commercial Instruments;MethodologyNew Methods; Detection Limits, Precision andAccu racy ; Stand a rd s a n d Stand a rd i za ti o n ;ApplicationsChemicals; Metals; Refractories and MetalOxides, Ceramics, Slags, Cements; Minerals;Air Analysis; Water Analysis; Soils, Plants andFertilizers, Foods and Beverages; Body Tissuesand Fluids;Hardcover 388pp 0 85186 707 3f48.00 ($88.00) RSC Members f32.00RSC members should send their orders to: The Royal Society of Chemistry, The Membership Officer,30 Russell Square, London WClB 5DT. Non-RSC members should send their orders to: The RoyalSocietv of Chemistry, Distribution Centre, Blackhorse Road, Letchworth, Herts SG6 1 HN.The Royal Society of ChemistryBurlington HouseLondon WIV OB