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BRIEF'S
BRIEFS Influence of the Ratio of Matrix to Analyte on the Fast Atom Bombardment Mass Spectrometric Response of Peptides Sampled from Aqueous Glycerol 2674 A systematic manipulation of sample composition (analyte, glycerol, and water) with five different peptides shows the potential for significant mass spectral enhancement. A model emphasizing surface effects is proposed. C. E. Heine, J. F. Holland, and J. T. Watson*, Departments of Chemistry and Biochemistry, Michigan State University, East Lansing, MI 48824 Comparison of Screening Techniques for Polychlorinated Biphenyls in Waste Oils 2682 The accuracy, precision, and interference susceptibility of colorimetric kits and neutron activation analysis for screening PCBs in oils are reported. Carol R. Sutcliffe, Ernest S. Gladney*, Deanna M. Seitz, and George H. Brooks, Health and Environmental Chemistry, Group HSE-9, Mail Stop K-484, Los Alamos National Laboratory, Los Alamos, NM 87545
Correspondence Assessing Heterogeneity of the High-Mannose Glycopeptide gp432 on the Variant Surface Glycoprotein of Trypanosomes: A Comparison of Plasma Desorption Mass Spectrometry and Radiolabeling Techniques 2686 Mark F. Bean, James D. Bangs, Tamara L. Doering, Paul T. Englund, Gerald W. Hart, Catherine Fenselau, and Robert J. Cotter*, Department of Pharmacology and Molecular Sciences and Department of Biological Chemistry, Johns Hopkins University School of Medicine, Baltimore, MD 21205
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Correction. Effect of Apolar Diluents on the Behavior of Chiral Stationary Phases in Gas Chromatography. Binary Mixtures of NLauroyl-L-valine-torf-butylamide with Squalane and //-Tetracosane 2688 Katsunori Watabe and Emanuel Gil-Av*, Department of Organic Chemistry, The Weizmann Institute of Science, Rehovot, Israel and Toshiyuki Hobo* and Shigetaka Suzuki, Department of Industrial Chemistry, Faculty of Technology, Tokyo Metropolitan University, Fukasawa, Setagaya-ku, Tokyo 158, Japan
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