HPLC-ELSD法分析重楼商品药材中甾体皂苷的含量

目的：建立重楼药材中主要生物活性成分甾体皂苷的HPLC-ELSD测定方法。方法：应用蒸发光散射检测器，以乙腈-水为流动相梯度洗脱，流速1 mL·min^-1，在反相C₁₈ (4.6 mm×150 mm, 5 μm)柱上，测定重楼药材中11个甾体皂苷的含量。结果：在30 min以内，成功地分离分析11个甾体皂苷。精密度、稳定性RSD均小于3%，加样回收率在95%～97%。结论：此方法对这11个甾体皂苷的测定具有良好的精密度。结果表明该方法简便、快速、选择性好，适用于常用中药重楼的质量分析。

Quantitative analysis of steroidal saponins in Chinese material medica Rhizoma Paridis by HPLC-ELSD

OBJECTIVE: The several species of the genus Paris called as Rhizoma Paridis were famous traditional Chinese medica. To develop the quantitative analysis method of the steroidal saponins in some species of the genus Paris and commercially available Rhizoma Paridis samples by HPLC-ELSD. METHOD: The contents of 11 steroidal saponins in Rhizoma Paridis samples were dectected with a Kromasil C18(4.6 mm x 150 mm, 5 microm) column which was deluted with acetonitrile-water (30:70-60:40) at a flow rate of 1 mL x min(-1) by HPLC-ELSD. RESULT: All the authentic samples could be separated and calibration curves of 11 saponins were prepared. 11 steroidal saponins in 16 Rhizoma Paridis samples were detected in 30 min. The recovery for the assay of saponins was between 95% and 97%. The precision and stability of samples (RSD) were below 3%. CONCLUSION: The method was shown to be accurate and convenient, and suitable for the quantitative analysis of these 11 steroidal saponins in the commercially available Rhizoma Paridis samples.