五味子蛋白的提取纯化及含量测定

目的:通过HPLC测定黄芩和半夏不同配伍比例后黄芩苷溶出量的变化,以探讨中药药性配伍的科学内涵。方法:采用Diamonsil C18(2)柱(4.6 mm×250 mm,5μm),乙腈-0.4%磷酸溶液(26∶74)为流动相,检测波长280 nm,流速1.0 mL.min-1,柱温30℃。建立黄芩与半夏配伍以寒为主(9∶6);寒热各半(9∶9);以热为主(6∶9)]后黄芩苷的含量测定方法,并比较不同配伍后黄芩苷溶出量的大小。结果:黄芩苷质量浓度在0.010 25～0.102 5 g.L-1线性关系良好(r=0.999 9),平均回收率99.21%(n=9),RSD 2.0%;黄芩配伍半夏后以寒为主(9∶6)、寒热各半(9∶9)、以热为主(6∶9)]和黄芩单煎后黄芩苷平均含量分别为64.018,63.6805,0.581,62.529 mg.g-1。结论:黄芩配伍半夏后黄芩苷的HPLC检测方法可靠、稳定、重复性好。不同比例配伍后黄芩苷的溶出量有较大差异,尤其是以热为主配伍(6∶9)对黄芩苷的溶出影响最大,溶出最低,体现了中药药性配伍中以半夏的温热之性抑制黄芩之寒凉之性的科学内涵。

Separation,Purification and Determination of Protein in Schisandra chinensis

Objective: To develop a simple method for effectively extracting protein from schisandra with the comparison of three extractive methods. Method: The extracts of the three methods were determined with SDS-PAGE,the content of protein was determined with the Lowry method,and a HPLC method was established for the determination of the amino acids in schisandra extract. Result: The protein content of the three methods was 58.44%,19.21% and 26.18%.The amino acids content of the three methods was 57.46%,15.41% and 23.14%. Conclusion: Purified protein and its amino acids were obtained by defatted ammonium sulfate precipitation procedure,and the content of protein was acceptable.This method is easily and more feasible.