HPLC/ELSD法结合固相萃取测定三七中人参皂苷Rg_1、Rb_1和三七皂苷R_1的含量

Assay of Ginsenoside Rg_1 and Rb_1 and Notoginsenoside R_1 in Radix Notoginseng by HPLC/ELSD with Solid Phase Extraction

目的建立三七药材中人参皂苷Rg1、Rb1和三七皂苷R1的含量测定方法。方法高效液相色谱-蒸发光散射检测(HPLC-ELSD)法,结合固相萃取技术对样品进行预处理。色谱柱:大连伊利特Hypersil氨基柱(200mm×4.0mm,5μm);流动相:乙腈-异丙醇-10mmol·L-1醋酸铵水溶液(冰醋酸调pH5.0)(75∶20∶5);流速:0.6mL·min-1;柱温:室温;ELSD雾化器温度:55℃;氮气流量:2.3L·min-1。结果人参皂苷Rg1、Rb1和三七皂苷R1的线性范围为1.0～10.0μg,加样回收率为95.5%～102.5%,日内精密度≤2%、日间精密度≤4%。结论该方法简便准确,可作为三七的含量测定方法。

Objective To establish a method for determinin g the content of ginsenoside Rg 1 and Rb 1 and notoginsenoside R 1 in Radix Notoginseng.Methods HPLC /ELSD with solid phase extraction(SPE)was applied.The chromatographic conditions were:Hypersil amino -column (200mm ×4.0mm,5μm),acetonitrile -isopropanol -ammon ium acetate(75∶20∶5;acetic acid adjusted pH to5.0)as mobile phrase,flow rate at 0.6mL·min -1 ,column temperature at room temperature,ELSD nebulization at 55℃and flow rate of nitrogen at 2.3L·min -1 Results The linear range of ginseno-side Rg 1 and Rb 1 ,notoginsenoside R 1 was from 1.0to 10.0μg .The average recoveries were 95.5%～102.5%.The inter -day RSD and intra -day were less than 2%and 4%respectively.Conclusion The method is simple and accu-rate,and can be used for the quality contro l of Radix Notoginseng and its preparations.