摘要
Aim To establish an RP-HPLC method for simultaneous determination of 2＂-O-rhamnosyl vitexin and vitexin in Chinese hawthorn leaf and its extract. Methods Chromatography was carfled out on Kromasil C18 column （250 mm × 4.6 mm, 5 μm）, using THF-CH3CN-H2O-H3PO4 （30 ： 5： 125 ： 0. 1） as the mobile phase at a flow rate of 1.0 mL·min^-1. The UV detection wavelength was 270 nm. Results The linear range of 2＂-O-rhamnosyl vitexin and vitexin were 0. 106 4 μg - 2. 1280 μg （ r =0. 999 1 ） and 0. 139 2μg - 2. 784 0 μg （ r =0. 999 3 ）, respectively. The average recoveries of 2＂-O-rhamnosyl vitexin and vitexin in Chinese hawthorn leaf were 99.2% （ RSD = 2.80%, n = 6） and 100.6% （ RSD = 2.84%, n = 6）, respectively. Conclusion This method is reproducible, simple, precise, and rapid for simultaneous determination of 2＂-O-rhamnosyl vitexin and vitexin in Chinese hawthorn leaf and its extract, thereby providinge the basis for quality specification of Chinese hawthorn leaf and its extract.
目的建立对山楂叶及其提取物中有效成分2″-O-鼠李糖牡荆素和牡荆素的含量同时进行测定的方法。方法应用反相高效液相色谱法同时测定山楂叶及其提取物中2″-O-鼠李糖牡荆素和牡荆素的含量。以C18柱作为色谱柱,四氢呋喃-乙腈-水-磷酸(30∶5∶125∶0·1)为流动相,检测波长为270nm,按外标法定量。结果线性范围分别为0.1064μg^2.1280μg(相关系数r=0.9991)和0.1392~2.7840μg(r=0.9993)。在山楂叶药材中,2″-O-鼠李糖牡荆素和牡荆素的平均加样回收率为99.21%(RSD=2.80%,n=6)和100.56%(RSD=2.84%,n=6);重复性试验的RSD分别为2.74%(n=6)和1.99%(n=6)。结论本方法简便,分离重现性好,灵敏度高,为山楂叶及其提取物中2″-O-鼠李糖牡荆素和牡荆素的含量同时测定提供了可行的含量测定方法,为山楂叶的质量标准提供了测定依据。
