ANALAO 111(10) 1113-1224 (1986) October 1986111311391143115311591163116711711175117911831189119712031207121 11215121912211223TheThe Analytical Journal ofAnalystThe Royal Society of ChemistryCONTENTSDirectly Coupled Chromatography - Atomic Spectroscopy. Part 1. Directly Coupled Gas Chromatography - AtomicUse of a Matrix Modifier and L'vov Platform in the Determination of Copper in Pooled Human Saliva by ElectrothermalSelective Reduction of Arsenic Species by Continuous Hydride Generation. Part 1. Reaction Media-Robert K.Selective Reduction of Arsenic Species by Continuous Hydride Generation. Part II. Validation of Methods forN-Oxalylamine(salicylaldehyde hydrazone) as an Analytical Fluorimetric Reagent for the Determination of NanogramSpectrophotometric Determination of Vanadium(V) with Desferrioxamine B-Svjetlana Luterotti, Vladmir GrdinicExtractive Spectrophotometric Determination of Chromium(lll) in Steels Using 4-(2-Pyridylazo)resorcinol andXylometazoline HydrochlorideY.Anjaneyulu, M. R. P. Reddy, C. S. KavipurapuSpectrophotometric Determination of Molybdenum After Separation by the Adsorption of its Trifluoroethylxanthateon Naphthalene-Md. Farid Hussain, Mohan Katyal, Bal Krishan Puri, Masatada SatakeDetermination of Trace Amounts of Formaldehyde by Ion-exchange Resin Thin-layer Spectrophotometry-KiichiMatsuhisa, Kunio OhzekiSpectrophotometric Determination of Benzyl Penicillin in Pharmaceutical Preparations Using Copper(l1) Acetate as aComplexing Agent-Utpal SahaDevelopment of a Multi-sensor System Using Coated Piezoelectric Crystal Detectors-Sheila M.Fraser, Tony E.Edmonds, Thomas S. WestComplexation Equilibria of Some Sulphoazoxines. Part VI. Protonation Constants of 7-(4-Carboxyphenylazo)-8-hydroxyquinoline-5-sulphonic Acid by Computer-assisted Multi-component Spectra Analysis-Milan Meloun,Jaromira Chylkova, Michal BartoSSpectroscopy. A Review-Les Ebdon, Steve Hill, Robert W. WardAtomic Absorption Spectrometry-lnes Game, Leonard0 Balabanoff, Rita Valdebenito, Luz VivaldiAnderson, Michael Thompson, Elisabeth CulbardApplication t o Natural Waters-Robert K. Anderson, Michael Thompson, Elisabeth CulbardAmounts of Aluminium-Fernando de Pablos, Jose Luis Gomez Ariza, Francisco PinoExperimental Artifacts and Determination of Accurate Py Values-Kenneth W.Street, Jr., William E. Acree, Jr.Large-scale Separation of Lipids From Organochlorine Pesticides and Polychlorinated Biphenyls Using a PolymericHigh-performance Liquid Chromatographic Column-Mark P. Seymour, Terry M. Jefferies, Lidia J. NotarianniPolarographic Determination of Conjugated Dienes in Hydrogenation Products of Pyrolysed Gasoline-Jaroslav Polak,Leo5 JanaEek, Jiii VolkeDirect Potentiometry of Residual Water in Sulpholane Using the Proton lsoconcentration TechniqueMohamedRashid Omar KarimAutomated Procedure for pH Measurement Using A Flow Cell-Mark R. Howson, William A. House, Alan D.PethybridgeSHORT PAPERSFlow Injection Determination of Nitrite by Amperometric Detection at a Modified ElectrodeJames A.Cox, Krishnaji R.Kul karniDetermination of Ethylene Dibromide in Aquatic Environments-Arthur J. Libbey, Jr.BOOK REVIEWSTypeset and printed by Heffers Printers Ltd, Cambridge, EnglanCLASSIFIED ADVERTISEMENTSRestrictions on the transfer of currency from some overseas countries to the United Kingdom are sometimes moresevere. 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