HPLC-MS测定黄芪药材中3种成分的含量

黄芪为豆科植物蒙古黄芪Astragalus membranaceus （Fisch．）Bge．var．mongholicus（Bge．）Hsiao或膜荚黄芪Astragalus membranaceus（Fisch．）Bge．的干燥根，具有补气固表、利尿脱毒、敛疮生肌等功效。黄芪中的主要有效成分为皂苷和黄酮类化合物，研究证实黄芪中的黄酮类成分具有清除氧自由基、抑制脂质过氧化、维持血中NO浓度和保护缺血再灌注损伤等多种药理活性，而黄芪皂苷在抗衰老、调节免疫功能、保护心肌和大脑缺血等多方面具有显著作用.

Determination of three constituents in Radix Astragali by HPLC-MS

AIM: To determine calycosin-7-O-beta-D-glucoside, astragaloside IV and formononetin in Radix Astragali and other relative samples by HPLC-MS. METHODS: HPLC was carried out with Agilent 1100LC/MSD, equipped with Agilent Zorbax SB C18 column (250 mm x 4.6 mm ID, 5 microm) and mass spectrum detector. The mobile phase (CH3CN-H2O) was eluted in gradient mode. RESULTS: The calibration curves of calycosin-7-O-beta-D-glucoside, astragaloside IV and formononetin were linear in the range of 0.03 - 1.21 microg x mL(-1), 0.35 - 13.86 microg x mL(-1) and 0.38 - 15.22 microg x mL(-1), respectively. These recoveries of samples were from 95% to 105% with RSD less than 1.5%. CONCLUSION: The method was employed to analyse 25 samples of Radix Astragali and other relative samples, including Radix Astragali slice, Radix Astragali Preparata, Hedysarum polybotrys Hand. -Mazz, Astragalus ernestii Comb. The contents of three constituents vary greatly because of the species, place of collection and season of harvesting. This method could apply to evaluate the quality of Radix Astragali and it is simple, sensitive and reliable.