Chromatography Products Catalogue Chromatography products
BRIEFS Fast Atom Bombardment Mass Spectrometric Quantitative Analysis of Methionine-Enkephalin in Human Pituitary Tissues 2395 Picomole levels of endogenous methionine-enkephalin per mg protein are measured by FABMS in individual human pituitary tissue extracts using a deuterated internal standard following multidimensional chromatographic purification. Jozef J. Kusmierz, R. Sumrada, and Dominic M. Desiderio*, Charles B. Stout Neuroscience Mass Spectrometry Laboratory and Departments of Immunology-Virology, Neurology, and Biochemistry, University of Tennessee—Memphis, 800 Madison Avenue, Memphis, TN 38163 Laser Ionization Gas Chromatography/Mass Spectrometry of Tetraethyltin 2400 Detection limits of 2.5 pg of tetraethyltin/mL or 1.5 fg of tetraethyltin absolute are obtained. This corresponds to values of 1.3 pg tin/mL or 750 pg of tin absolute. Steven M. Colby, Michael Stewart, and James P. Reilly*, Department of Chemistry, Indiana University, Bloomington, IN 47405
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Enzyme Immunoassay of Insulin by Semiconductor Laser Fluorometry 2404 Totaro Imasaka, Hiroyuki Nakagawa, Takashi Okazaki, and Nobuhiko Ishibashi*, Faculty of Engineering, Kyushu University, Hakozaki, Fukuoka 812, Japan
Technical Notes Reversed Injector Loading Technique for Simultaneous Determinations by Flow Injection Analysis 2405 José Luis Perez Pavon*, Carmelo Garcia Pinto, Bernardo Moreno Cordero, and Jesus Hernandez Méndez, Department of Analytical Chemistry, Bromatology and Food Sciences, University of Salamanca, Salamanca, Spain Bottle-Calibration Static Head Space Method for the Determination of Methane Dissolved in Seawater
2408
Kenneth M. Johnson*, Jeffrey E. Hughes, Percy L. Donaghay, and John McN. Sieburth, Graduate School of Oceanography, University of Rhode Island, Narragansett, RI02882
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Separation of Yttrium-90 and Strontium-90 on Papers Impregnated with lonizable Crown Ethers
2412
C. M. Wai* and H. S. Du, Department of Chemistry, University of Idaho, Moscow, ID 83843 On-Valve Electrochemical Detector for High-Speed Flow Injection Analysis
2414
Joseph Wang* and Ruiliang Li, Department of Chemistry, New Mexico State University, Las Cruces, NM 88003 CAMPAIGN FOR CHEMISTRY
ANALYTICAL CHEMISTRY, VOL. 62, NO. 21, NOVEMBER 1, 1990
