Sensitive quantitative determination of oxymatrine and matrine in rat plasma by capillary electrophoresis with stacking induced by moving reaction boundary

2007-07-27 15:00 下载量：80

资料摘要

资料下载

A quantitative method of capillary electrophoresis with sample stacking induced by moving reaction boundary (MRB) was developed for sensitive determination of oxymatrine (OMT) and matrine (MT) in rat plasma. The experimental conditions were optimized firstly. Below are the optimized experimental conditions: 20mM sodium formate solution (HCOONa, adjusted to pH 10.70 by ammonia) as sample solution, 3 min 14 mbar sample injection, 40mM formic buffer (HCOOH–HCOONa, pH 2.60) as stacking buffer, 7 min 14 mbar injection of stacking buffer, 100mM HCOOH–HCOONa (pH 4.80) as separation buffer, 73 cm capillary (effective length 64 cm), 21 kV voltage, 210 nm wavelength. Under the optimized conditions, higher than 60-fold sensitivity improvement of the stacking was simply achieved as compared with capillary zone electrophoresis, and the detectable limits obtained for OMT and MT were 0.26 and 0.19 gmL−1, respectively. Then, numerous demonstrations were carefully performed for the methodological validations of OMT and MT in rate plasma, including high specificity of method, good linearity (r = 0.9993 for OMT, r = 0.9991 for MT), fair wide linear concentration range (1.30–65.00 gmL−1 for OMT, 0.84–42.00 gmL−1 for MT), low limit of detection (1.03 gmL−1 for OMT, 0.38 gmL−1 for MT), less than 5% intra- and inter-day variance value, and higher than 96% recovery of OMT and MT in plasma. The developed method could be used for the trace analyses of OMT and MT in plasma and was finally used for the investigation on pharmacokinetic study of OMT in rat plasma.

资料下载

文献贡献者

北京华阳利民仪器有限公司

铜牌会员 | 第22年

查看全部资料