40N ANALYST, MARCH 1993, VOL. 118 Future Issues will Include- Determination of Trace Amounts of Phosphorus by Laser Excited Time-resolved Fluorimetry-Ronghua Li and Zhauro Zhou Determination of Aluminium in Different Tissues of the Rat by Atomic Absorption Spectrometry With Electrothermal Atomization-Aleksandar Radunovic, Michael W. B. Brad- bury and H. Trevor Delves Determination of Ascorbic Acid by Flow Injection Analysis With Chemiluminescence Detection-Abdulrahman A. Alwarthan Palladium-Magnesium Nitrate as a Chemical Modifier for the Determination of Lead in Mussel Slurries by Electrothermal Atomic Absorption Spectrometry-P. Bermejo-Barrera, M. Aboal-Somoza, Rosa Maria Soto-Ferreiro and R. Dominguez- Gonzalez Immobilization of Glutamate Oxidase on Non-porous Glass Beads.Automated Flow Injection System for the Assay of Glutamic Acid in Food Samples and Pharmaceuticals-Stella M. Tzouwara-Karayanni, Constantine D. Stalikas and Mil- tiades I. Karayannis Novel Instrumentation and Biomedical Applications of Very Near Infrared Fluorescence-M. B. Brown, Tony E. Edmonds, James N. Miller, D. P. Riley and Nichola J. Seare Enzymes for Amperometric Detection of Herbicides in Aquatic Environments-Fiona A. McArdle and Krishna C. Persaud Incorporation of Hydroxamic Acid Ligands Into Nafion Film Electrodes-Damien W. M. Arrigan, Brian Deasy, Jeremy D. Glennon, Brian Johnson and Gyula Svehla Determination of Zirconium and Molybdenum With 4 3 - Dihydroxybenzene-l,3-disulfonic Acid Disodium Salt by Ion- pair Reversed-phase High-performance Liquid Chromato- graphy-hh- Jen Jane, Tsai and Hsiao-Tzu Yan Molecular Recognition Using Conducting Polymers: Basis of a New Electrochemical Sensing Technology-G.G. Wallace and P. R. Teasdale Determination of Iodide Ion in Impregnated Charcoals by Flow Injection-Colin G. Taylor, Cheryl D. Monks and Duangjai Nacapricha Recovery of Sulphadimidine from Pig Feeds-Peter Warwick, Neil T. Crosby and Ian M. Barwick An Account of Kinetic Determinations and Other Kinetic Aspects of Analytical Chemistry: from C6rdoba to Erlangen -Horacio A. Mottola Separation and Determination of Thiosulfate, Sulfite and Sulfide in Mixtures-Tomozo Koh, Katsuaki Okabe and Yasuyuki Miura Poly(pyrro1e) Based Amperometric Sensors: Theory and Characterization-Michael E. G. Lyons, Cormac H. Lyons, Catherine Fitzgerald and Thomas Bannon Multi-layer Conducting Polymer Gas Sensor Arrays for Olfactory Sensing-Jonathan M.Slater, J. Paynter and Esther J. Watt Evaluation of Coating Materials Used On Piezoelectric Crystals for the Detection of Dimethylsulfide in Liquefied Petroleum Gas-K. Hawkesworth and John F. Alder Monitoring of Sulfur Dioxide Using a Piezoelectric Crystal Based Controller-John J. McCallum, F. Benmakroha, T. Boudjerda, R. Boufenar, H. Allag and F. Djerboua Present State of Fabrication of Chemically Sensitive Field Effect Transistors-Karel Domanskf , Jiii Janata, Mira Josowicz and Danuta Petelenz Biosensor System Employing Acoustic Impulses in Thin Polymer Films-P. W. Walton, P. M. Gibney, M. P. Roe, M. J. Lang and W. J. Andrews Sodium-selective Membrane Electrode Based on p-tert-Butyl- calix[4]arene Methoxyethylester-K. Cunningham, S. J. Har- ris, M. A. McKervey and Gyula Svehla Development of Interdigitated Acoustic Wave Transducers for Biosensor Applications-D. Zhang, G. M. Crean, T. Flaherty and A. Shallow Novel Approach to the Development of Alkalinity and Acidity Detectors-0. Lev and M. Tsionsky Laboratory of the Government Chemist, Past and Future- Richard D. Worswick 2nd National Symposium on Planar Chromatography: Modern Thin-Layer Chromatography Co-Chairmen: Professor Harold M . McNair and Professor Colin F. Poole September 19-22, 1993 Research Triangle Park, North Carolina,USA Further information may be obtained from: Janet E . Cunningham, Barr Enterprises, P . O . Box 279, Walkersville, MD 21793 USA Phone: (301) 898-3772 - Fax: (301) 898-5596