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JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
Development and validation of a reliable high-performance liquid chromatographic method for determination of nodakenin in rat plasma and its application to pharmacokinetic study.
Biomedical Chromatography : BMC 2011 October
A simple and reliable high-performance liquid chromatographic (HPLC) method has been developed for the determination of nodakenin in rat plasma. The concentration of nodakenin was determined in plasma samples after deproteinization with methanol using hesperidin as internal standard. HPLC analysis was performed on a Diamonsil C(18) analytical column using acetonitrile-water (25:75, v/v) as the mobile phase and a UV detection at 330 nm. This method was validated in terms of recovery, linearity, accuracy and precision (intra- and inter-day variation). The extraction recoveries were 91.3 ± 10, 87.8 ± 4.8 and 92.6 ± 5.1 at concentrations of 0.500, 5.00 and 40.0 μg/mL, respectively. The standard curve for nodakenin was linear (r(2) ≥ 0.99) over the concentration range 0.250-50.0 μg/mL with a lower limit of quantification of 0.250 μg/mL. The intra- and inter-day precision (relative standard deviation, RSD) values were not higher than 12% and the accuracy (relative error, RE) was within ± 5.8% at three quality control levels. The validated method was successfully applied for the evaluation of the pharmacokinetics of nodakenin in rats after oral administration of Rhizoma et Radix Notopterygii decoction and nodakenin solution.
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