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D O N T WASTE TIME Liquid Chromatography/Electrochemistry (LCEC) can permit direct determination of many phenols, aromatic amines, and nitro compounds. Subpicomole detection limits are usual with LCEC. The selectivity of LCEC often avoids the need for elaborate sample ::rse?, • ' · • ' '

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Join the successful scientists and receive your own subscription to Analytical Chemistry so you can use it w h e n — a n d how — you want! There are fifteen important reasons why you need your individual subscription: Twelve monthly issues filled with the latest peerreviewed research plus The April Review Issue (a reference supplement alternating between applications and fundamentals) and Lab Guide (a purchasing directory covering instru­ ments, equipment, chemicals and services) The fifteenth reason? You get all of this vital professional input for just $24.00 a year ($18.00 if you are a member of ACS)! Guaranteed! The American Chemical Society will refund the unused portion of your subscription fee at any time you are not satisfied! Join the Analytical Chemist VIP set! Call toll free or use the coupon to order your individual subscription now!

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1338 A · ANALYTICAL CHEMISTRY, VOL. 55, NO. 13, NOVEMBER 1983