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    Determination of Estrone and 17β-Estradiol in Water Samples Using Dispersive Liquid–Liquid Microextraction Followed by LC

    A new method, termed dispersive liquid–liquid microextraction (DLLME), was developed for the extraction and pre-concentration of estrone (E1) and 17β-estradiol (E2) in water samples. The samples were extracted...

    **wei Du, Xuedong Wang, Yanyan Li, Faqing Ye, Qiaoxiang Dong… in Chromatographia (2010)