title: [Determination of three principal components in chuanjing tablets by using high performance liquid chromatography].
abstract: Uniform design method was employed to optimize the mobile phase of HPLC in order to determine simultaneously three principal components, theophylline, amobarbital and methylephedrine hydrochloride, in Chuanjing tablet, a compound preparation for asthma and cough. The stationary phase was ODS and the optimal mobile phase composition was V (0.015 mol/L phosphate buffer containing 0.3% triethylamine, pH 4.9): V (methanol) = 35:65. The detection was performed at 215 nm and the sensitivity was time programmed for simultaneous determination of minor and major components. Caffeine was selected as the internal standard. A baseline separation was achieved within 10 min. The linear ranges for theophylline, amobarbital and methylephedrine hydrochloride were 0.03 g/L-0.20 g/L, 7.5 mg/L-50.0 mg/L and 7.5 mg/L-50.0 mg/L, recoveries 99.7%-102.6%, 98.5%-100.2% and 98.0%-102.7%, inter-day RSDs 0.23%-1.2%, 0.35%-2.5%, 0.33%-1.6% respectively. This HPLC method is rapid and accurate, and suitable for the quality control of the preparation.
authors.affiliation: Department of Analytical Chemistry, Shenyang Pharmaceutical University, Shenyang 110015, China. fameili@ihw.com.cn
authors.forename: F M
authors.initials: FM
authors.lastname: Li
authors.forename: F
authors.initials: F
authors.lastname: Qiu
authors.forename: W H
authors.initials: WH
authors.lastname: Wang
authors.forename: X J
authors.initials: XJ
authors.lastname: Guo
authors.forename: X
authors.initials: X
authors.lastname: Di
mesh_terms: D000654:Amobarbital / Q000032:analysis*; D001993:Bronchodilator Agents / Q000032:analysis; D002851:Chromatography, High Pressure Liquid; D004338:Drug Combinations; D004809:Ephedrine / Q000031:analogs & derivatives* / Q000032:analysis*; D006993:Hypnotics and Sedatives / Q000032:analysis; D013607:Tablets; D013806:Theophylline / Q000032:analysis*
chemical_list: D001993:Bronchodilator Agents; D004338:Drug Combinations; D006993:Hypnotics and Sedatives; D013607:Tablets; C041707:N-methylephedrine; D013806:Theophylline; D004809:Ephedrine; D000654:Amobarbital