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Determination of quinolizidine alkaloids in Sophora medicinal plants by capillary electrophoresis
Analytica Chimica Acta 523(2004)15-20,-0001,():
A new capillary electrophoresis (CE) method for the determination of quinolizidine alkaloids in Sophora medicinal plants was developed. A total of seven alkaloid components (cytisine, sophocarpine, matrine, lehmannine, sophoranol, oxymatrine and oxysophocarpine) were separated within 15 min. The running buffer was a 50mMphosphate buffer containing 1%HP-β-CD and 3.3% isopropanol. The linear calibration ranges were 5.50-88.0µgml−1 for cytisine and lehmannine, 5.00-88.0[1]gml−1 for sophocarpine and sophoranol, 5.60-89.6µgml−1 for matrine and oxysophocarpine, and 24.0-384µgml−1 for oxymatrine. The recoveries of the seven alkaloids were 96.0-102.9% with relative standard deviations from 1.50 to 3.00% (n=5). The methodwas successfully applied to different Sophora medicinal plants including Sophora flavescens, Sophora tonkinensis and Sophora alopecuroides.
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