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Abstract
A high performance liquid chromatographic method for determination of aristolochic acid, a nephrotoxicant in traditional Chinese medicinal prescriptions containing Radix Aristolochiae Fangchi, was established. (The prescriptions included Mu-Fang-Ji-Tang, Fang-Ji-Huang-Qi-Tang, Shu-Jing-Huo-Xue-Tang, Xiao-Xu-Ming-Tang, Shang-Zhong-Xia-Tong-Yong-Tong-Feng-Fang, and Fang-Ji-Fu-Ling-Tang.) The samples were analyzed by HPLC on a LiChrospher 100 RP-18e column and detected at 395 nm with acetonitrile water and 2% (v/v) acetic acid (45 : 55, v/v) as the mobile phase at a flow rate of 1.0 mL/min. The regression equations of aristolochic acid I was Y=2.85e+ 004X−5.20e+003 (r=0.9999). The intraday and interday relative standard deviations of aristolochic acid I were at the levels of 0.31–2.01% and 0.09–1.85%, respectively. The recoveries of aristolochic acid I added in the six kinds of blank prescriptions were between 93.0 and 102.0%. Thirty four samples of commercial concentrated preparation containing Fang-Ji were analyzed and the results showed that fourteen samples contained aristolochic acid I. The contents of aristolochic acid I in samples were between 0.30 to 1.84 mg/g.
ACKNOWLEDGMENTS
We are grateful to China Medical College Hospital, Taichung, Taiwan, R.O.C, for the financial support of this work under contract DMR-88-051 and to Dr. Li-Kang Ho, National Yang-Ming University, for helpful discussions.
