SPE-HPLC法测定中成药中葛根素的含量

Determination of Puerarin in Some Chinese Patent Medicines Containing Radix Purerariae by SPE- HPLC

目的建立一种简便、准确、可靠的葛根素含量测定方法。方法采用固相萃取进行样品的前处理,样品经适当处理后加压流过固相萃取微柱,固相萃取微柱吸附溶液中强保留物质以保护分析柱,而被吸附饱和的葛根素流出液作为供试品溶液,用高效液相色谱法进行含量测定。结果葛根素在0.2052～2.4640μg进样量范围内线性关系良好,r=0.9999;心通口服液平均回收率达99.5%,RSD=1.67%(n=5);葛根药材平均回收率为99.9%,RSD=1.44%(n=5);感冒止咳颗粒平均回收率达98.5%,RSD=0.95%(n=5)。结论该法简便快速、准确可靠,可用于含葛根中成药中葛根素的含量测定。

Objective To established a method for the determination of puerarin. Method The sample solutions were pretreated by solid phase extraction (SPE): the specimens were eluted and the cartridges saturated gradually by them in the SPE, but the strongly absorbed impurities were held by the cartridges all the same, and then the effluents were measured by HPLC. Results The linear range of puerarin was 0.205～ 2.464μ g, r=0.9999. The average recovery of puerarin in Xintong Oral Liquid, Radix Purerariae and Ganmao Zhike Capsule were 99.5 % , 99.9 % and 98.5 % , RSD were 1.67 % , 1.45 % and 0.95 % (n=5) respectively. Conclusion The method is simple and accurate and can be used for the determination of puerarin in the Chinese patent medicines containing Radix Purerariae. 