数字农科院2.0

Magnetic Solid-Phase Extraction Of Dichlorodiphenyltrichloroethane A.nd Its Metabolites From E nvironmental Water Samples Using Ionic Liquid Modified Magnetic Multiwalled Carbon Nanotube/Zeolitic Imidazolate Framework-8 As Sorbent

文献类型： 外文期刊

作者： Huang, XD; Liu, YN; Liu, HF; Liu, GY; Xu, XM; Li, LY; Lv, J; Liu, ZX; Zhou, WF; Xu, DH

作者机构：

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

期刊名称： MOLECULES

ISSN：

年卷期： 2019 年 24 卷 15 期

页码：

收录情况： JCR（2021版）

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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