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Dispersive Liquid-liquid Microextraction Coupled with HPLC for Preconcentration and Determination of
[会议论文] 作者：Yaomei Hao,Xuan Chen,Shuang Hu,Xiaohong Bai,Deshuang Gu,
来源：第六届上海国际分析化学研讨会 年份：2012
Isomeric triterpenic acids of oleanolic acid (OA) and ursolic acid (UA)(as Fig.1) both have very low ultraviolet absorption and always exist in the same plant,s...
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