摘要
[目的]采用HPLC-DAD对西湖龙井茶中的表没食子儿茶素没食子酸酯(EGCG)的含量变化进行分析.[方法]采用AgilentC18色谱柱(4.6 mm×150 mm,5μm),流动相:甲醇:水(2%乙酸)15∶85;流速:1.0 ml/min;检测波长:276 nm;柱温:35℃.[结果]EGCG线性范围为0.152~3.040 μg,相关系数r为1,平均回收率97.61%,RSD为6.61%.[结论]该方法精密度、准确度良好,稳定性高,能简便、快速地测定大小茶树的西湖龙井茶中的EGCG含量.
[ Obiective ] HPLC-DAD is used to analyze the content of EGCG from West Lake Longjing tea in different periods. [ Method ] Agi- lent C18 (4.6 mm ×150 mm, 5 μm) is taken as the column, methanol solution and 2% acetic acid water solution (15:85, V/V) as the mo- bile phase, the velocity o f flow is 1.0 ml/min, the column temperature is 35 ℃, the inspect wave length is 276 nm. [ Result] The linear range of EGCG is 0. 152 - 3. 040 μg, r = 1, the average rate of recovery is 97.61% and the RSD is 6.61%. [ Conclusion ] The method was precise, accurate, highly stable, simple, convenient and rapid for the quantitative determination of EGCG.
出处
《安徽农业科学》
CAS
2014年第12期3714-3715,共2页
Journal of Anhui Agricultural Sciences
基金
浙江省教育厅项目(Y200908478)