ANALYST, APRIL 1993, VOI,. 118 51N Future Issues will Include- ton-selective Electrodes in the Analysis of Drug Substances: Potentiometric Microtitration of L-Ascorbic Acid With Copper(i1) Sulfate and its Application to the Analysis of Pharmaceutical Preparations-Antonio Campiglio Sensor Properties of Filled Polymer Composites-D. Yu. Godovski, E. A. Koltypin, A. V. Volkov and M. A. Moskvina Coupled Gas Chromatography-Atomic Absorption Spec- trometry Using Semi-enclosed Tubular Atomizers: Theo- retical Analysis of Detector Performance Characteristics- Douglas C. Baxter and Wolfgang Frech Decomposition of 2,6-Dichlorophenolindophenol in Strongly Acidic Solutions: a Potential Kinetic Method for the Determi- nation of pH-Miltiades I. Karayannis, Constantina N. Konidari and Christos G.Nanos Simultaneous Kinetic Fluorimetric Determination of Amoxy- cillin and Clavulanic Acid by the Stopped-flow Mixing Technique-Pilar Izquierdo, Agustina Gomez-Hens and Dolores Perez-Bendito Catalytic Method for the Determination of Trace Amounts of Mercury in Environmental Samples-A. Ramesh Extended Kalman Filter for Multiwavelength, Multi- component Kinetic Determinations-Stanley R. Crouch and Brett M. Quencer Determination of Dissolved Copper, Nickel and Cadmium in Natural Waters by High-performance Liquid Chromato- graph y-Sean Comber Determination of Trace Amounts of Heavy Metals in Alu- mina by Electrothermal Atomic Absorption Spectrometry After Diethyldithiocarbamate Extraction and Matrix Pre- cipitation-Masataka Hiraide, Takaaki Uchida and Hiroshi Kawaguchi Nitrate Ion-selective Coated-wire Electrode Based On Tet- raoctadecylammonium Nitrate in Solid Solvents and the Effect of Additives on Its Selectivity-Hirokazu Hara, Hiromi Ohkubo and Kaori Sawai 6,7-Dimethoxy-l-me thyl-2( lH)-quinoxalinone-3-propionyl- carboxylic Acid Hydrazide as a Fluorescence Derivatization Reagent for Aldehydes in High-performance Liquid Chromatography-Masatoshi Yamaguchi, Tetsuharu Iwata, Tsuyoshi Hirose and Masaru Nakamura Substitution of Peroxidase in Trinder’s Reagent With Iron(i1) for the Determination of Hydrogen Peroxide in Enzymic Reactions by Applying Flow Injection-Miltiades I. Karayannis, Efstratios R.Kiranas and Stella M. Tzouwara- Karayanni Determination of Lead in Urine by Electrothermal Atomic Absorption Spectrometry With Probe Atomization-David Littlejohn and Tianyu Chen Ultraviolet Spectrophotometric, Solvent Extraction, High- performance Liquid Chromatographic and Polarographic Study of an H+/K+ Adenosine Triphosphatase lnhibitor and its Acid-catalysed Degradation Products-W.F. Smyth, E. O’Kane, V. N. Ramachandran and S. McClean Intercomparison of Methods for the Determination of Vita- mins in Foods. Part l . Fat-soluble Vitamins-Peter C. H. Hollman, Peter J. Wagstaffe, Uta Faure, David A. T. Southgate, Paul M. Finglas and Jean H. Slangen Intercomparison of Methods for the Determination of Vita- mins in Foods. Part 2. Water-soluble Vitamins-Peter C. H. Hollman, Jean H. Slangen, Peter J. Wagstaffe, Uta Faure, David A. T. Southgate and Paul M. Finglas Surface Modification of the Biomedical Polymer Poly- (ethylene terephtha1ate)-Lan.N. Bui, Michael Thompson, Neil B. McKeown, Alex D. Romaschin and Peter G. Kalman Determination of Trace Amounts of Phosphate in Water After Preconcentration Using a Thermally Reversible Poly- mer-Kiyoko Takamura, Chiyo Matsubara, Sigeru Izumi, Hiroshi Yoshioka and Yuichi Mori 2nd National Symposium on Planar Chromatography: Modern Thin-Layer Chromatography Co-Chairmen: P r o f e s s o r Harold M. McNair and P r o f e s s o r Colin F. P o o l e September 19-22, 1993 Research Triangle Park, North Carolina,USA F u r t h e r information may be obtained from: Janet E . Cunningham, Barr Enterprises, P.O. Box 2 7 9 , Walkersville, MD 21793 USA Phone: ( 3 0 1 ) 898-3772 - Fax: ( 3 0 1 ) 898-5596EUROANALYSIS VIII The Eighth European Conference on Analytical Chemistry will be held at the University of Edinburgh September 5-11,1993 Organized by the Analytical Division of The Royal Society of Chemistry on behalf of WPAC/FE@S Scientific Prwamme Euroanalysis VIII will cover developments in instrumentation and methodology in all areas of analytical chemistry, with em- phasis on industrial, biomedical and environmental analysis.The programme will be designed to appeal to both practising analytical chemists in industry and those in academia who are teaching and carrying out research. The programme will consist of invited keynote lectures and contributed oral and poster papers. In order to ensure high quality, all contributed papers will be refereed. Social Promamme A comprehensive programme is being planned for participants and accompanying persons.It will include half- and full-day excursions, and various evening events including a whisky tasting and a Buffet Reception at the Royal Museum of Scotland. Publication All of the invited lectures will be published in a collected volume as the proceedings of the conference. Authors of con- tributed papers will be encouraged to submit manuscripts for publication in either The Analyst or the Journal of Analytical Atomic Spectrometry (JAAS). Topics Some of the topics covered are: Industrial Analysis Validation of Analytical Measurements, Process Control Analysis, Materials Analysis (including Surface Analysis), Energy Related Analysis Pharmaceutical Methods and Drug Metabolism, Forensic Science, Bioselective Methods, Trace Elements in Medicine Separation Science, Molecular Spectroscopy, Atomic Spectrometry, Electroanalytical Techniques, Expert Systems and Chemometrics,Coupled Techniques, Sensors, Laser- based Techniques, Flow Analysis Pharmaceutical and Biomedical Analysis Environmental Analysis Atmosphere, Soils/Sediments, Food/Drink,Water Instrumental Techniques Conference Secretariat: Honorary Chairman, E.J. Newman Conference Presidium: D.T. Bums, Belfast (Chairman); J.F.K. Huber, Vienna; L. Niinisto, Espoo; P.G. Zambonin, Bari Secretary and Conference Organizer: Miss P.E. Hutchinson, Analytical Division, The Royal Society of Chemistry, Burlington House, Piccadilly, London W1V OBN, UK Tel. 071 437 8656; Fax 071 734 1227; Telex 268001 All correspondence and requests for further information should be addressed to the Conference Organizer.