Magnetic solid-phase extraction of pyrethroid insecticides from tea infusions using ionic liquid-modified magnetic zeolitic imidazolate framework-8 as an adsorbent

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;Xu, Donghui;Gao, Haixiang;Liu, Huifang

作者机构：

期刊名称：RSC ADVANCES （ 影响因子：3.361； 五年影响因子：3.39 ）

ISSN：

年卷期： 2019 年 9 卷 67 期

页码：

收录情况： SCI

摘要： A simple, sensitive, and reliable magnetic solid-phase extraction (SPE) method coupled with GC-MS/MS for the effective analysis of four pyrethroids from tea infusions was developed. A magnetic adsorbent, named ionic liquid-modified magnetic zeolitic imidazolate framework-8 (Fe3O4/ZIF-8/IL), was prepared by immobilizing an ionic liquid (IL) on the surface of Fe3O4/ZIF-8. The textures of Fe3O4/ZIF-8/IL were confirmed by material characterization, and the results suggested that the adsorbent possessed high magnetism (59.0 emu g(-1)), an adequate Brunauer-Emmett-Teller (BET) surface area (104 m(2) g(-1)), and a large pore volume (0.68 cm(3) g(-1)). To confirm the extraction performance of the prepared Fe3O4/ZIF-8/IL, several experimental conditions affecting the extraction efficiency were investigated. Under the optimum conditions, the limits of determination (LODs) for the four pyrethroids were in the range of 0.0065-0.1017 mu g L-1 (S/N = 3 : 1) with an intra-day relative standard deviation (RSD) of <= 9.70% and inter-day RSD of <= 11.95%. The linear ranges were 0.5-50 mu g L-1 for bifenthrin and 0.5-500 mu g L-1 for permethrin, cypermethrin, and flucythrinate, with determination coefficients higher than 0.999. Finally, the proposed technique was successfully applied for the determination of pyrethroids in real tea infusions. This work could be extended to other IL-modified metal-organic frameworks (MOFs) and to the development of different sample pretreatment techniques.

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