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Direct Determination of Phospholipid Structures in Microorganisms by Fast Atom Bombardment Triple Quadrupole Mass Spectrometry
1032
Various MS/MS scans are used in combination with rap id extractions and automated i n s t r u m e n t control to quickly produce phospholipid class and fatty acyl profiles. A spectrum of all species of the phosphatidylethanolamine (PE) class is obtained with 1 pg of PE, equivalent to 10 E. coli cells. Mark J. Cole and Christie G. Enke*, Department of Chemis try, Michigan State University, East Lansing, MI 48824
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Separation and Identification of Organic Gunshot and Explosive Constituents by Micellar Electrokinetic Capillary Electrophoresis 1038 Twenty-six organic constituents of gunpowders and ex plosives can be determined in < 10 min with μιηοΙ/L de tection limits. Application of the method to extracts of ammunition shell casings, reloading powders, and plastic explosives is demonstrated. David M. Northrop and Daniel E. Martire, Chemistry De partment, Georgetown University, Washington, DC 20057 and William A. MacCrehan*, Organic Analytical Research Divi sion, National Institute of Standards and Technology, Gaithersburg, MD 20899
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Physical Optics
Temperature Programming for Separation of Polyoxyethylene Oligomers 1043 Temperature programming effectively reduces the time needed for separation of polyoxyethylene oligomers with out impairing the resolution and permits the use of re fractive index and conductivity detectors. Tetsuo Okada, Faculty of Liberal Arts, Shizuoka University, Shizuoka 422, Japan
Correspondence Scanning Tunneling Microscopy and Atomic Force Microscopy in the Characterization of Activated Graphite Electrodes 1047 Michael S. Freund and Anna Brajter-Toth*, Department of Chemistry, University of Florida, Gainesville, FL 32611-2046, Thérèse M. Cotton, Department of Chemistry, Iowa State University, Ames, IA 50011, and Eric R. Henderson, Department of Zoology and Genetics, Iowa State University, Ames, IA 50011 Activity of Choline Oxidase Monitored in Situ with an Unmodified Glassy Carbon Electrode 1050 Joseph Z. Stemple*, Karin M. Rusin, and Thomas L. Fare, Center for Bio/Molecular Science & Engineering, Mail Code 6090, Naval Research Laboratory, Washington, DC 20375-5000
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548 A · ANALYTICAL CHEMISTRY, VOL. 63, NO. 10, MAY 15, 1991
Batch Injection Ana lysis 1053 Joseph Wang* and Ziad Taha, Department of Chemistry, New Mexico State University, Las Cruces, NM 88003
