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이창현,이계주,Lee, Chang-Hyun,Rhee, Gye-Ju 대한약학회 1988 약학회지 Vol.32 No.4
A simple and sensitive HPLC method was developed for the simultaneous determination of ten kinds of active ingredients formulated in commercial cough-cold mixtures. A group of Pseudoephedrine HCl, dl-Methylephedrine HCl, Noscapine, Chlorophenylamine maleate, Dextromethorphan HBr and Phenylpropanolamine HCl were determined at 254nm using a Novapak $C_{18}$ column with mobile phase consisting of a mixture of methanol-acetonitrile-1, 4dioxane-tetrahydrofuran-water(12 : 20 : 20 : 5 : 43, pH4.7) containing 0.013M-dioctyl sodium sulfosuccinate. The another group of Acetoaminophen, Caffeine, Guaifenesin and Ethenzamide were also determined at 254nm using a Novapak $C_{18}$ column as the stationary phase, and a mixture of methanol-1% aqueous acetic acid (3 : 7). The results indicate that these methods are accurate and precise with relative standard deviation of not more than 1% (n=5) for the above active ingredients.