Whether you are in research, development, management, or all three...

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Whether you are in research, development, management, or all three... BRIEFS CHEMTECH is, you should be reading! is the publication CHEMTECH is so stimulating, so wide-ranging, so idea-packed, it's guaranteed! Once you've seen an issue oi CHEMTECH, you'll want to use it every day. mmmm Mmn^m Countless benefits in each monthly issue! ARTICLES You'll welcome regular access to wide-ranging authoritative arti-cles on people management... legal issues . . . new chemical technologies . . . chemical effects within the environment... development of new materials . . . new engineering techniques . . . education . . . business strategies . . . uses of computers and robotics . . . just to name a few. CHEMTECH also contains regular features that will undoubtedly become your favorite reading . . . VALUED HIGHLIGHTS Heart Cuts point the way to new products, processes, research, or simply that odd fact you wouldn't see anywhere else. You'll also find informative highlights from current literature. EYE-OPENING OPINIONS View from the Top gives CEO's, university presidents, and other top-ranking industry leaders a chance to speak out. The Guest Editorial is one person's opinion on important issues of all kinds. And each month the founding editor, B.J. Luberoff, provides a provocative look at today's world. CHEMTECH also looks at the world with a lighter eye in The Last Word and original cartoons. We could go on, but there just isn't enough room! 'For personal use only. "Air Service included. Foreign payment must be made in U.S. dollars by international money order, UNESCO coupons, or U.S. bank draft. Orders accepted through your subscription agency. For nonmember rates in Japan, contact Maruzen Co., Ltd. Subscriptions to CHEMTECH will begin when order is received and will expire one year later unless specific start date is requested. Please allow 45 days for your first copy to be mailed. To subscribe, contact: American Chemical Society, Marketing Communications Dept, 1155 Sixteenth Street, NW, Washington, DC 20036. Telex: 440159 ACSP Ul or 89 2582 ACSPUBS. In a hurry? Call TOLL FREE (800) 227-5558 (U.S. Only) and charge you order! In D.C. or outside the U.S. call (202) 872-4363. Or FAX your order: (202) 872-4615. Please send FAX to the attention of the Marketing Communications Dept. See for yourself.. . Subscribe today! 1989 Rates Canada & U.S. Mexico Europe" All Other Countries"" Members* One Year Two Years $ 37 $ 43 $ 50 $ 62 $ 74 $ 88 $ 54 $ 96 Nonmembers (Personal) One Year Two Years $ 65 $ 71 $ 78 $110 $122 $136 $ 82 $144 Nonmembers (Institutional) One Year Two Years $282 $288 $295 $479 $491 $505 $299 $513 Built-in Carbon-13 Intensity Reference for Solid-State Analysis by Magic-Angle-Spinning Nuclear Magnetic Resonance Spectrometry 2579 Detailed 13C relaxation and calibration exper iments demon-s t ra te t h a t the 13C N M R signal of the "bu i l t - in" Delrin resonance of a large-sample M A S system can be used as an intensi ty s t anda rd for absolute 13C spin counting measure-ments . Ming Zhang and Gary E. Maciel*, Department of Chemistry, Colorado State University, Fort Collins, CO 80523 Technical Notes Evaporation Device for Continuous Flow Liquid Secondary Ion Mass Spectrometry 2582 Ming-chuen Shih*, Tao-Chin Lin Wang, and S. P. Markey*, Laboratory of Clinical Science, National Institute of Mental Health, Bethesda, MD 20892 Manual Headspace Method To Analyze for the Volatile Aromatics of Gasoline in Groundwater and Soil Samples 2584 Valerie D. Roe, Michael J . Lacy, and James D. Stuart*, Depart-ment of Chemistry, U-60, 215 Glenbrook Road, University of Con-necticut, Storrs, CT 06269-3060 and Gary A. Robbins, Department of Geology and Geophysics, U-45,345 Mansfield Road, University of Connecticut, Storrs, CT 06269-3045 Comparison of Paraffin Oil and Poly(chlorotrifluoroethylene) Oil Carbon Paste Electrodes in High Organic Content Solvents 2585 Neil D. Danielson*. Ju l ie Wangsa, and Margare t A. Targove, Department of Chemistry, Miami University, Oxford, OH 45056 Versatile Impedance Matching Network for Inductively Coupled Plasma Spectrometry 2589 Akbar Montaser*, Izumi Ishii, and R. H. Clifford, Department of Chemistry, George Washington University, Washington, D.C. 20052, and S. A. Sinex and S. G. Capar, Division of Contaminants Chemistry, Food and Drug Administration, Washington, D.C. 20204 1252 A ANALYTICAL CHEMISTRY, VOL. 61, NO. 22, NOVEMBER 15, 1989

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