利用效价为1:12800(方阵滴定法测得)的兔抗薯蓣皂苷多克隆抗体,建立黄精皂苷酶联免疫吸附(ELISA)检测方法。抗体的最佳稀释度为1:3000,包被抗原的最佳稀释度为1:10000;回归方程I=32.021 logC+189.02,相关系数R^2=0.9974,最低检测下限I10为2.468×10^-3μg/mL。回收率为80.33%~103.88%,与人参皂苷和强心苷的交叉反应率分别为3.24%和7.48%。测得黄精总皂苷质量分数为0.1366%。
ELISA method to determine the saponins of Rhizoma Polygonati was established by the rabbit with multi-clone antibody having 1 : 12 800. The optimum diluted ratio of antibody and coated antigen were 1:3 000 and 1 : 10 000, respectively. The equation was I = 32.021 logC + 189.02. The correlation coefficient was 0.9974 and the lowest limit was 2.468× 10^-3μg/mL. The recovery rate of samples was between 80.33 % and 103.88 %. The rate of intercrossing reaction of saponins of Rh/zoma polygonati with ginseng saponins and cardiac saponins were 3.24% and 7.48%, respectively. The total content of saponins of Rhizoma polygonati was 0. 136 6%.