目的:建立人参中丙二酰基人参皂苷含量的测定方法。方法:采用反相高效液相色谱法,以μ-Bondapak C-18(300mm×3.9mm,5μm)柱为分析柱,乙腈-0.05mol·L^-1磷酸二氢钾溶液(25:75)为流动相,柱温:35℃,检测波长:203nm,流速:1mL·min^-1,以外标法检测。结果:丙二酰基人参皂苷Rb1、Rb2、Rc分别在0.02—1.19mg·mL^-1(r=0.9998)、0.02—0.99mg·mL^-1(r=0.9997)、0.01—0.83mg·mL^-1(r=0.9996)浓度范围内呈良好的线性关系。平均回收率(n=3)分别为103.0%(RSD=1.3%)和98.5%(RSD=1.0%)、102.4%(RSD=1.2%)和98.1%(RSD=0.6%)、102.1%(RSD=2.8%)和100.1%(RSD=1.0%)。结论:本法简便、准确、灵敏。
Objective:To set up an assay method for the determination of malonyl - ginsenosides in fresh root of Panax ginseng. Methods: RP - HPLC was conducted on a μ - Bondapak^TM C - 18 (300 mm × 3.9 mm,5 μm) with acetonitrile - 0. 05 mol · L^ - 1 potassium dihydrogen phosphate ( 25 : 75 ) as mobile phase, column temperature at 35 ℃, detecting at 203 nm and flow rate 1.0 mL · min^-1. Te external standard method was used. Results:The linear ranges for malonyl -ginsenoside Rbl, Rb2and Rc were 0. 02 - 1.19 mg · mL^-1 (r = 0. 9998 ) ,0. 02 -0. 99 mg · mL^-1 ( r = 0. 9997 ), 0. 01 - 0.83 mg · mL^ -1 ( r = 0. 9996 ), respectively; The average recoveries ( n = 3 ) were 103.0% (RSD = 1.3%) and 98.5% (RSD = 1.0%), 102. 4% (RSD = 1.2%) and 98. 1% (RSD = 0.6%), 102. 1% ( RSD = 2. 8% ) and 100. 1% ( RSD = 1.0% ), respectively. Conclusion: The method is simple, accurate and sensitive.