Magnetic Solid-Phase Extraction of Dichlorodiphenyltrichloroethane and Its Metabolites from Environmental Water Samples Using Ionic Liquid Modified Magnetic Multiwalled Carbon Nanotube/Zeolitic Imidazolate Framework-8 as Sorbent

文献类型： 外文期刊

第一作者： Huang, Xiaodong

作者： Huang, Xiaodong;Liu, Yanan;Liu, Huifang;Liu, Guangyang;Xu, Xiaomin;Li, Lingyun;Lv, Jun;Liu, Zhongxiao;Xu, Donghui;Zhou, Wenfeng;Liu, Huifang

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关键词： dichlorodiphenyltrichloroethane; magnetic solid phase extraction; zeolitic imidazolate framework; ionic liquid; environmental samples

期刊名称：MOLECULES （ 影响因子：4.411； 五年影响因子：4.587 ）

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年卷期： 2019 年 24 卷 15 期

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收录情况： SCI

摘要： As persistent organic pollutants, dichlorodiphenyltrichloroethanes (DDTs) and their metabolites pose considerable risks to human health and the environment. Therefore, monitoring DDTs in the environment is essential. Here, we developed a green, simple, and effective magnetic solid-phase extraction (MSPE) method coupled with gas chromatography tandem triple-quadrupole mass spectrometry to determine the DDT content of environmental water samples. A magnetic ionic liquid (IL) adsorbent was developed based on a modified magnetic multiwalled carbon nanotube/zeolitic imidazolate framework-8 (MM/ZIF-8/IL), synthesized by immobilizing the IL on the surface of MM/ZIF-8. We confirmed successful synthesis of MM/ZIF-8/IL by material characterization, and our results suggested that the MM/ZIF-8/IL had a high Brunauer-Emmett-Teller surface area (159.9 m(2) g(-1)), good thermostability (<800 degrees C), and a high degree of superparamagnetism (52.9 emu g(-1)). Several experimental conditions affecting the MSPE efficiency were optimized. Under the best conditions, good detection linearity was achieved (0.5-500 mu g L-1) with determination coefficients ranging from 0.9927 to 0.9971. The lower limits of detection (0.0016-0.0072 mu g L-1) also had good precision, having an intraday relative standard deviation (RSD) <= 6.5% and an interday RSD <= 8.9%. Finally, we used the as-developed method to determine DDT levels in environmental water samples.

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