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HPLC法测定藏药三果汤中没食子基儿茶素没食子酸酯和表没食子基儿茶素没食子酸酯的含量

2021-07-11黄宽林艾和范源

中国民族民间医药·下半月 2021年4期

黄宽 林艾和 范源

【摘 要】 目的:建立藏药三果汤中没食子基儿茶素没食子酸酯(GCG)和表没食子基儿茶素没食子酸酯(EGCG)的HPLC含量测定方法。方法:Agilent Zorbax C18键合硅胶柱(150 mm×4.6 mm,5 μm);乙腈-0.1%磷酸梯度洗脱;流速:1.0 mL·min-1;检测波长:280 nm;柱温:25 ℃;进样量:10 μL。结果:EGCG和GCG在浓度0.0231~0.2310 mg·mL-1、0.0084~0.0840 mg·mL-1范围内呈良好的线性关系,相关系数均大于0.9990;加样回收率分别为100.09%和99.52%,RSD值分别为0.95%和1.03%(n=6)。结论:建立HPLC法同时检测藏药三果汤中EGCG和GCG的含量,该方法简便、准确、重复性好,结果可靠,可为藏药三果汤中相关成分的质控提供参考。

【关键词】 HPLC;藏药三果汤;没食子基儿茶素没食子酸酯;表没食子基儿茶素没食子酸酯

【中图分类号】R927.2 【文献标志码】 A 【文章编号】1007-8517(2021)08-0030-05

Abstract:Objective A high performance liquid chromatography (HPLC) method was established for the determination of epigallocatechin gallate (EGCG) and gallocatechin gallate (GCG) in Tibetan medicine Triphala Decoction.Methods The chromatographic column is an Agilent Zorbax C18 bonded silica column (150 mm×4.6 mm, 5 μm), the mobile phase is acetonitrile-0.1% phosphoric acid gradient elution, the flow rate is 1.0 mL·min-1, the detection wavelength is 280 nm, the column temperature is 25 ℃, and the injection volume is 10 μL.Results EGCG and GCG showed a good linear relationship in the concentration range of 0.0231~0.2310 mL·min-1 and 0.0084~0.0840 mL·min-1, and the correlation coefficients were both greater than 0.9990; the sample recovery rates were 100.09% and 99.52%, respectively, and the RSD value They are 0.95% and 1.03% respectively (n=6).Conciusion An HPLC method was established to simultaneously detect the contents of EGCG and GCG in Tibetan medicine Sanguo Decoction.This method is simple, accurate, reproducible, and reliable.It can provide a reference for the quality control of related components in Tibetan medicine Triphala Decoction.

Key words:HPLC; Tibetan Medicine Triphala Decoction; Epigallocatechin Gallate; Gallocatechin Galate

三果汤又名哲布汤,由诃子(Terminalia chebula)、毛诃子(Terminalia bellirica)和余甘子(Phyllanthus emblica)3味药组成,为藏医中重要的基础方,《四部医典》中记载,其具有治疗瘟疫、紊乱热症、促使热症成型的作用[1]。现代研究表明,三果汤主要含鞣质酚酸类成分[2],具有抗菌[3]、抗炎[4-5]、抗肿瘤[6-7]、抗氧化[8]、抗辐射[9]、降糖[10]、降脂[11]、肝肾损伤的保护[12-13]等药理作用。没食子基儿茶素没食子酸酯(gallocatechin gallate,GCG)、表没食子基儿茶素没食子酸酯(epigallocatechin gallate,EGCG)为儿茶素类物质,具有抗氧化、降脂、抗肿瘤、抗血栓等作用以及清除自由基活性等[14-18]。目前,尚无对三果汤中这两个成分进行定量分析的报道,为更全面地评价三果汤的质量,本研究建立建立新的HPLC方法对三果汤中EGCG和GCG成分的含量进行定量测定。

1 仪器与试剂

Agilent 1200高效液相色谱仪(美国Agilent公司),色谱柱为 Agilent Zorbax C18键合硅胶柱(150 mm×4.6 mm,5 μm);DFY-600摇摆式高速万能粉碎机(永康式速锋工贸有限公司);T-1000型电子天平(上海浦春计量仪器有限公司);AB265-SMETTLER TOLEDO十万分之一分析天平(Mettler-tolido international trade(Shanghai) co.LTD)。……

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