Using semimicro columns (150 × 1 mm I.D.) of octadecyl silica and styrene-divinylbenzene porous polymer, antipyretic drugs were analyzed by means of high-performance liquid chromatography. The antipyretics studied were sulpyrin, caffeine guaiacol glycerol ether, acetaminophen, 3-hydroxy-p-butyrophenetidine, methyl p-hydroxybenzoate phenacetin, mefenamic acid, aspirin, salicylamide, salicylic acid, o-ethoxybenzamide theobromine, theophylline and their preparations. The semimicro columns are economical in solvents in chromatographic analysis.
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