%0 Journal Article
%T Improved method for analyzing the degradation of estrogens in water by solid-phase extraction coupled with ultra performance liquid chromatography-ultraviolet detection<br>
%A Minggang Zheng
%A Ling Wang
%A Yuandui Bi
%A Feng Liu
%A <br>
%J 环境科学学报(英文版)
%D 2011
%I 
%X We established an improved method for the determination of four estrogens including estriol (E3), 17β-estradiol (E2), 17α-ethynyl-estrodiol (EE2) and estrone (E1) in water. The method consisted of solid-phase extraction (0.5 L water) and subsequent analysis of analytes by ultra-performance liquid chromatography (UPLC) with an ultraviolet detector (UVD). Base-line separation was achieved for all studied estrogens using a column (50 nm × 2.1 mm) packed with 1.7 μm particle size stationary phase. Recovery was higher than 88% and detection limits ranged between 12.5-23.7 ng/L for the four estrogens, with the RSD ranging from 7% to 11%. The method was successfully applied to determine E2 and EE2 in simulated natural water, which found that about 70% of E2 was degraded (with a half-life of about 30 hr) within 48 hr and about 55% of EE2 was degraded (with a half-life of about 36 hr). Low levels of El were found, however E3 was undetectable during the process.
%K estrogens
%K base-lined separation
%K half-life
%K degradation<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=6CB1530875F53489BF1E81BD87B7F5E6&aid=D68B776229F9086C8A30A06A402EB630&yid=9377ED8094509821&vid=EA389574707BDED3&iid=E158A972A605785F&sid=99A964928ADB4E67&eid=6CDD207A90CE1EEC&journal_id=1001-0742&journal_name=Journalofenvironmentalsciences(China)&referenced_num=0&reference_num=29