Abstract
A simple, rapid and sensitive reverse phase liquid chromatography-diode array detector method has been developed and validated for the determination of isoliquiritigenin in rat plasma using acetanilide as an internal standard. The plasma was deproteinized with acetonitrile and separated from the aqueous layer by adding sodium chloride. The mobile phase was acetonitrile, 0.05 M potassium dihydrogen phosphate and triethylamine (50:50:0.5, v/v/v) (pH 2.00). Detection wavelength was set at 242 nm during 0–5 min and 362 nm during 5–9 min. The limit of quantification was 0.019 μg mL−1. The mean accuracy was 96.851–98.140%. Extract recoveries at concentration of 0.038, 0.625, 1.250, 5.000 and 20.000 μg mL−1 were 82.740, 80.814, 80.920, 80.978 and 81.103%, respectively. The validated method was successfully applied to the pharmacokinetic study of ISL in rat plasma after intravenous administration.
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Technological help from Ph.D. Yuming Dong (College of Pharmacy, Lanzhou University) and Ph.D. Wenli Zhang (College of Pharmacy, China Pharmaceutical University) is gratefully acknowledged.
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Zhang, X., Liu, J., Qiao, H. et al. Determination and Pharmacokinetics of Isoliquiritigenin in Rat Plasma by RP–LC After Intravenous Administration. Chroma 70, 423–430 (2009). https://doi.org/10.1365/s10337-009-1236-3
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DOI: https://doi.org/10.1365/s10337-009-1236-3