26N ANALYST, FEBRUARY 1993, VOL. 118 Future Issues Will lnclude- Detection of Aluminium(1n) Binding to Citrate in Human Blood Plasma by Proton Nuclear Magnetic Resonance Spec- troscopy-Peter J. Sadler, Gina Kubal, Stojan RaduIovic, Alan Tucker and Jimmy D. Bell Flow Injection Chemiluminometric Determination of Epinephrine, Norepinephrine, Dopamine and L-Dopa- Antony C. Calokerinos, Nikolaos T. Deftereos and Constanti- nos E. Efstathiou Development of an Antibody-based Amperometric Biosensor to Study the Reaction of 7-Hydroxycoumarin With its Specific Antibody-Malcolm R. Smyth, Eithne Dempsey, Ciara O’Sul- livan, Denise Egan, Richard O’Kennedy and Joseph Wang Novel Electrochemical Device for the Detection of Choles- terol and Glucose-John F. Cassidy, Cathriona Clinton, William Breen, Robert Foster and Eilish O’Donoghue Data Processing by Neural Networks in Quantitative Chem- ical Analysis-Martinus Bos, A.Bos and W. E. van der Linden Addition and Measurement of Water in Carbon Dioxide Mobile Phase €or Supercritical Fluid Chromatography- Dongjin Pyo and Doweon Ju Sensor-Tissue interactions in Neurochemical Analysis with Carbon-paste Electrodes In Vivo-Robert D. O’Neill Flow-through (Bio)chemical Sensors-Miguel Valcarcel and Maria Dolores Luque de Castro Analysis of Steroids: Qualitative and Quantitative Character- ization of Bulk Cholesterol by Gas Chromatography and Gas Chromatography-Mass Spectrometry-Anna Lauk6, Eva CsizCr and Sandor Gorog Organic-phase Biosensors for Assays of Pharmaceutical Products-Joseph Wang, Yuehe Lin and Liang Chen Total Phosphate Determination in Waste Waters by On-line Microwave Digestion Incorporating Colorimetric Detection -Stephen J. Haswell, Kathleen E. Williams, David A. Barclay and Gaynor Preston Development of an International Chemical Measurement System-Bernard King Low-level Determination of Formaldehyde in Water by High-performance Liquid Chromatography-Evangel0 Cot- saris and Brenton C. Nicholson 2nd National Symposium on Planar Chromatography: Modern Thin-Layer Chromatography Co-Chairmen: Professor Harold M . McNair and P r o f e s s o r Colin F. P o o l e September 1 9 - 2 2 , 1993 Research Triangle P a r k , N o r t h C a r o l i n a J J S A Further information may be obtained from: Janet E . Cunningham, Barr Enterprises, P.O. Box 279, Walkersville, M D 21793 USA Phone: (301) 898-3772 - Fax: (301) 898-5596