126N Analyst, August 1996, Vol. 121 Future Issues Will Include Biodegradation Studies of Selected Hydrocarbons from Diesel Oil-Hermina Leskovsek, Ester Sepic, Colin Trier Study of the Interaction of a Soil Fulvic Acid with U022+ by Self-modelling Mixture Analysis of Synchronous Molecular Fluorescence Spectra-J. C. G. Esteves Da Silva, Adelio A. S. C. Machado, Cesar J. S. Oliveira Investigation into the Impact of Introducing Workplace Aerosol Standards Based on the Inhalable Fraction-James H. Vincent, Mark A. Werner, Terry M. Spear On the Assessment of Particle Size Distribution in Workers' Aerosol Exposures-James H. Vincent, Gurumurthy Ramachandran, Mark A. Werner Procrustes Analysis for Determination of Number of Significant Masses in Gas Chromatography-Mass Spectrometry-R. G.Brereton, Cevdet Demir, Peter Hindmarch Methods and Instrumentation for Workplace Aerosol Measure- ments-David Y. H. Pui Evaluation of Passive Methods for Measuring Ozone in the European Alps-H. Werner, Markus Hangartner, Manfred Kirchner Cross-sections of Spectrochromatograms for the Resolution of Pesticide Overlapping Peaks in Diode-array High-performance Liquid Chromatography- J. L. Martinez Vidal, P. Parrilla, M. Martinez Galera, A. Garrido Frenich A Study of the Relationship Between Structural Attributes and Observed Electrogenerated Chemiluminescence Activity of Tertiary Amines, as Potential Analytes for the Tris(2,2'- bipyridine)ruthenium(II) Electrogenerated Chemiluminescence Reaction-Andrew W. Knight, Gillian M. Greenway Direct Matrix-assisted Laser Desorption/Ionization-Quadru- pole Ion Trap Mass Spectrometry of Pesticides Adsorbed on Solid Phase Extraction Membranes-C.S. Creaser, Anthony W. T. Bristow, Sylvie Nelieu, Jacques Einhorn Laser Desorption Fourier Transform Mass Spectrometry of Selected Pesticides Extracted on C18 Silica Solid Phase Extraction Membranes-J. F. Muller, Christophe Masselon, Gabriel Krier, Sylvie Nelieu, Jacques Einhorn Matrix Solid Phase Dispersion Technique for the Determination of Moxidectin in Bovine Tissues-"". Alvinerie, J. F. Sutra, D. Capela, P. Galtier, A. Fernandez-Suarez, E. Horne, Michael O'Keeffe Evolution of a Specific Fluorogenic Dervatization of Ivermectin for Bioanalytical Applications-David W. Fink, Pierre de Montigny, Jung-Sook Kim Shim Photochemical-Spectrofluorimetric Determination of Two Pyrethroid Insecticides Using an Anionic Micellar Medium- Jean Jacques Aaron, Atanasse Coly Luminol Chemiluminescence Based Porphyrin Assays Without Hydrogen Peroxide: A Spectral Study of Mechanism and Enhancement-Carole Poupon-Fleuret, Jean-Paul Steghens, Jean-Claude Bernengo Slurry Preparation by High-pressure Homogenization for the Determination of Heavy Metals in Zoological/Botanical Stan- dard Reference Materials in Animal Foods by Electrothermal Atomic Absorption Spectrometry-William D.Marshall, Yanxi Tan, Jean-Simon Blais Polymeric Membrane Salicylate-sensitive Electrodes Based on Organotin(1v) Carboxylates-Ru-Qin Y u, Dong Liu, Wen-Can Chen, Guo-Li Shen Determination of Formaldehyde in Air by Ion Exclusion and Ion Exchange Chromatography with Amperometric Detec- tion-Brian Johnson Does Sampling Contribute Significantly to Measurement Errors'? If So, What Can Be Done About It?-Erik Olsen Catalytic Determination of Dissolved Inorganic Carbon in Natural Waters by Flow Injection Spectrophotometry-Maria F.Gine, Nelson Maniasso, Sandra Sato, Antonio 0. Jacinth0 Rigid Carbon-Polymer Biocomposites for Electrochemical Sensing. A Review-Salvador Alegret Analytical Challenges in the Development of Modified-releasd Oral Solid Dosage Forms-Michael J. Bowker COPIES OF CITED ARTICLES The Royal Society of Chemistry Library can usually supply copies of cited articles. For further details contadt: The Library, Royal Society of Chemistry, Burlington House, Piccadilly, London WlV OBN, UK. Tel: +44 (0)171-437 8656. Fax: +44 (0)171-287 9798. Telecom Gold 84: BUR210. Electronic Mailbox (Internet) LIBRARY@RSC.ORG. If the material is not available from the Society's Library, the staff will be pleased to advise on its availability from other sources. Please note that copies are not available from the RSC at Thomas Graham House, Cambridge.