期刊
JOURNAL OF CHROMATOGRAPHY A
卷 1524, 期 -, 页码 13-20出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2017.09.066
关键词
Poly (ionic liquid); Magnetic adsorbent; Magnetic solid-phase extraction; Triazole fungicides; Waters
资金
- National Natural Science Foundation of China [21777133, 21377105, 21577111]
- National Key Research and Development Program of China [2016YFC0502904]
- Natural Science Foundation of Fujian Province of China [2015J01061]
This work prepared a new poly (ionic liquid)-functionalized magnetic adsorbent (PFMA) for the extraction of triazole fungicides (TFs) in environmental waters prior to determination by high performance liquid chromatography/diode array detection (HPLC-DAD). A polymerizable ionic liquid, 1-methyl-3-allylimidazolium bis(trifluoromethylsulfonyl)imide was employed to copolymerize with divinylbenzene on the surface of modified magnetite to fabricate the PFMA. The morphology, spectroscopic and magnetic properties of the new adsorbent were investigated by different techniques. A series of key parameters that influence the extraction performance including the amount of PFMA, desorption solvent, adsorption and desorption time, sample pH value and ionic strength were optimized in detail. Under the optimum conditions, the prepared PFMA could extract targeted TFs effectively and quickly under the format of magnetic solid-phase extraction (MSPE). Satisfactory linearities were achieved in the range of 0.1-200.0 mu g/L for triadimenol and 0.05-200.0 mu g/L for other TFs with good coefficients of determination above 0.99 for all analytes. The limits of detection (S/N =3) and limits of quantification (S/N = 10) for TFs were in the range of 0.0050-0.0078 mu g/L and 0.017-0.026 mu g/L, respectively. Environmental waters including lake, river and well waters were used to demonstrate the applicability of developed MSPE-HPLC-DAD method, and satisfactory recoveries and repeatability were obtained. (c) 2017 Elsevier B.V. All rights reserved.
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