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