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JUNE 15, 1989 VOLUME 61 NUMBER 12 Analytical Chemistry EDITOR: GEORGE H. ΜΟRRISΟΝ ASSOCIATE EDITORS: Klaus Biemann, GeorgesGuiochon,Walter C. Herlihy, Robert A. Osteryoung, Edward S. Yeung Editorial Headquarters 1155 Sixteenth St., N.W. Washington. DC 20036 Phone: 202-872-4570 Telefax: 202-872-6325 Managing Editor: Sharon G. Boots Associate Editors: Louise Voress, Mary Warner Assistant Editors: Grace Κ. Lee, Alan R. Newman Editorial Assistant: Felicia Wach Director, Operational Support: C. Michael Phillippe Production Manager: Leroy L. Corcoran Art Director: Alan Kahan Designer: Amy Meyer Phifer Production Editor: Elizabeth E. Wood Circulation: Claud Robinson Editorial Assistant, LabGuide: Joanne Mullican

Journals Dept., Columbus·, Ohio Associate Head: Marianne Brogan Journals Editing Manager: Joseph E. Yurvati Associate Editor: Rodney L. Temos Staff Editor: Sharon K. Hatfield Advisory Board: Bernard J. Bulkin, Michael S. Epstein, Renaat Gijbels, Peter R. Griffiths, Thomas L. Isenhour, Nobuhiko Ishibashi, James W. Jorgenson, Peter C. Jurs, Mary A. Kaiser, David L. Nelson, Lawrence A. Pachla, Ralph E. Sturgeon, George S. Wilson, Mary J. Wirth, Andrew T. Zander, Richard N. Zare Ex Officio: Sam P. Perone Instrumentation Advisory Panel: James B. Callis, Bruce Chase, R. Graham Cooks, L. J. Cline Love, Sanford P. Markey, Ronald Ε. Ma­ jors, Linda B. McGown, Gary W. Small, R. Mark Wightman

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ANCHAM 61(12) i-vi/1R-304R (1989) ISSN 0003-2700

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