摘要：Acetylsalicylic acid, phenacetin, and caffeine in antipyretic preparations were determined by gasliquid chromatography with hydrogen flame ionization detector on 2-m column of 8% SE-52, at 170°. Acetylsalicylic acid was changed to trimethylsilyl derivative at room temperature by using hexamethyldisilazane and trimethylchlorosilane. Determination was made successfully by the internal standard method using dibutyl phthalate.
