Analyst, February 1996, Vol. 121 23N Future Issues Will Include Quantification of Gas Phase Sidestream Cigarette Smoke Components Using Fourier Transform Infrared Spectroscopy- S. Keith Cole, Patricia Martin Determination of Trace Amounts of Reduced Glutathione by a Chemical Oscillating Reaction-Dolores Perez-Bendito, Rafael Jimenez-Prieto, Manuel Silva Retention Properties of a Spacer Bonded Propanediol Sorbent for Reversed-phase Liquid Chromatography and Solid-phase Extraction-Colin F. Poole, Donna S. Seibert, Michael H. Abraham Polarographic Behaviour of Sulfadiazine, Sulfamerazine, Sulfa- methazine and their Mixtures. Abilities of Partial Least Squares Methods in the Resolution of the Non-additive Signals of these Compounds-T. Galeano Diaz, A. Guiberteau Cabanillas, M.I. Acedo Valenzuela, F. Salinas Selective Detection of Aroma Components by Acoustic Wave Sensors Coated with Conducting Polymer Films-Michael Thompson, David C. Stone, Zhiping Deng Determination of Ethyl Alcohol in Beer by Dual-pulse Staircase Voltammetry in Flow Injection-Y. S. Fung, S. Y. Mo Amperometric Determination of L-Malic Acid in a Flow Injection Manifold Using Packed Bed Enzyme Reactors-M. I. Karayannis, Mamas I. Prodromidis, Stella Tzouwara- Karrayanni, Pankaj Vadgama, Andrew Maines Enzymic Method for Determination of Ethanol and Methanol- Ulyana M. Mizgunova, Galina A. Zolotova, Inga F. Dolmanova Resolution of Multicomponent Mixture Spectra in Mid-infrared Spectroscopy Using Spherical Projection Factor Analysis- Application to Real Data Including a Six-component Mixture Set-R.G. Brereton, Stephen P. Gurden, John A. Groves Silicones and Their Analysis in Biological Matrices. A Review-Michael Thompson, Biljana Cavic-Vlasak, Dennis C. Smith Flow Injection Fluorimetric Determination of Fluoride or Phosphate Based on their Inhibitory Effect on the Photo- oxidation of Acridine Catalysed by Iron(m)-Tomas Perez- Ruiz, Carmen Martinez-Lozano, Virginia Tomas, Antonio Sanz Comparative Study of the Ratio Spectra Derivative and Partial Least Squares Methods to the Simultaneous Determination of Atrazine and Ametryn in Groundwaters-F. Garcia Montelongo, R. Corbella Tena, M. A. Rodriguez Delgado, M. J. Sanchez Filled Fluorosilicone as Matrix Material for Ion-selective Membranes-S. Adam, C. Dumschat, S. Alazard, M. Knoll, K. Cammann Solid-phase Extraction of Heavy Metal Ions on a High Surface Area Titanium Dioxide (Anatase)-E. Vassileva, I. Proinova, K. Hadjiivanov COPIES OF CITED ARTICLES The Royal Society of Chemistry Library can usually supply copies of cited articles. For further details contact: 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.