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- W3020528065 abstract "王 尉 ,林 楠 ,周晓晶 ,乐胜锋 ,杜 宁 ,张经华 1,3* (1.北京市理化分析测试中心,北京 100089;2. 有机材料检测技术与质量评价北京市重点实验室,北京 100094;3.全国标准样品技术委员会天然产物标准样品专业工作组,北京 100094) 摘 要:依据 GB/T 15000标准样品工作导则,开展表没食子儿茶素没食子酸酯(epigallocatechin gallate, EGCG)国家标准样品研制工作。以绿茶样品作为研究材料,采用溶剂提取、萃取、高速逆流色谱(high-speed countercurrent chromatography,HSCCC)分离纯化,制备得到 EGCG。通过紫外-可见吸收光谱(UV),红 外光谱(IR),质谱(MS)和核磁共振波谱(NMR)等方法对 EGCG样品进行结构鉴定,并进行均匀性、 稳定性检验。采用 8 家实验室进行联合定值,并对定值结果进行数据分析。结果:EGCG标准样品均匀性 和稳定性良好,定值结果为 99.29%,置信度 95%的扩展不确定度为 0.16%。结论:所制备得到的 EGCG样 品满足标准样品工作导则的要求,可用于绿茶相关产品中 EGCG的质量控制和方法验证。" @default.
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- W3020528065 date "2016-01-01" @default.
- W3020528065 modified "2023-09-23" @default.
- W3020528065 title "Development of EGCG Reference Material" @default.
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