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《中国化学(英文版)》 2004-10
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Simultaneous Separation and Determination of Four Bioactive Constituents in Traditional Chinese Medicinal Tablet Xinkeshu by HPLC-DAD

HE, Jian-Tao SHI, Zhi-Hong YAN, Jin ZHAO, Mei-Ping* CHANG, Wen-BaoKey Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China  
A reversed-phase high performance liquid chromatographic method for simultaneous determination of four bioactive constituents was established for the quality control of traditional Chinese medicinal tablet Xinkeshu. Danshensu, protocatechualdehyde, puerarin and daidzein were successfully separated on a Diamonsil C18 column (150×4.6 mm i.d., 5 祄) with a guard column (12.5×2.1 mm i.d., 5 祄) packed with the same material at 25 ℃. The mobile phase was a mixture of acetonitrile and 0.02 mol/L potassium dihydrogen phosphate employing gradi-ent elution at a flow rate of 0.8 mL/min. Detection was accomplished with a diode-array detector and detection wavelength was set at 280 nm before 22 min, then it was varied to 250 nm. The four constituents were identified by comparing their retention time and UV spectra in the range of 190—400 nm with those of authentic standards. The linear calibration ranges were 15.4—123.2, 3.11—25.22, 21.6—172.8, and 0.26—3.47 礸/mL for danshensu, pro-tocatechualdehyde, puerarin and daidzein, respectively. The detection limits were 0.03, 0.04, 0.10, 0.03 礸/mL for danshensu, protocatechualdehyde, puerarin, and daidzein, respectively. The contents of these four bioactive con-stituents in Xinkeshu tablet were successfully determined by the proposed method.
【Fund】: Project supported by 985 Foundation of Chinese Traditional Medicine Modernization of Peking University.
【CateGory Index】: O657.7
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