Mengxiang Su, Min Song, Bin Di
Jul 1, 2015
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Influential Citations
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Journal
Biomedical chromatography : BMC
Abstract
A highly selective and specific LC-MS/MS method was developed and validated for the determination of wilforine in rat plasma. The analyte was separated from plasma matrix by using methyl tertiary butyl ether liquid-liquid extraction with bulleyacinitine A as internal standard (IS). The analysis was carried out on a Sepax GP-Phenyl column using a mixture of methanol and 10 mmol/L ammonium formate buffer solution containing 0.1% formic acid (75:25, v/v) as the mobile phase pumped at a flow rate of 1.0 mL/min. The detection was operated using a triple-quadrupole mass spectrometer in multiple selected reaction monitoring with the parent-to-product quantifier transitions [M + H](+) m/z 867.6 →206.0 for wilforine and 664.1 →584.1 for IS. The main advantage of this method was the high sensitivity (a lower limit of quantification of 0.02 ng/mL) and the small amount of sample (0.1 mL plasma per sample). The method was fully validated to be accurate and precise with a linear range of 0.02-100 ng/mL, and successfully applied to a bioavailability study of wilforine in rats after intravenous and oral administration. The oral absolute bioavailability of wilforine in rats was estimated to be 84%.