Journal
ANALYTICA CHIMICA ACTA
Volume 1066, Issue -, Pages 49-57Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aca.2019.03.049
Keywords
Mechanochemical magnetic solid phase extraction; Magnetic metal-organic-framework; Organochlorine pesticides; Environmental contaminants
Categories
Funding
- National Natural Science Foundation of China [21507062, 21475061, 21575067]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry [[2015]1098]
- Program of Natural Science Research of Jiangsu Higher Education Institutions of China [16KJB150022]
- Priority Academic Program Development of Jiangsu Higher Education Institutions, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
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A mechanochemical magnetic solid phase extraction (MCMSPE) method was developed for a one-pot extraction and enrichment of organochlorine pesticides in tea leaves to demonstrate the advantage of using magnetic nanoparticles in the sample preparation process. The enriched analytes were subsequently detected by ultra-high performance liquid chromatography and gas chromatography mass spectrometry. The presence of magnetic metal-organic-framework (MMOF) (Fe3O4@MIL-100 (Fe)) nanoparticles help to rupture the cell walls in solid plant samples more thoroughly, and at the same time, act as a selective sorbent for the enrichment of target analytes. Compared to traditional methods, this approach significantly shortens the sample processing time from tens of minutes to tens of seconds. The parameters of the procedure were systematically studied and optimized to achieve good limits of detection (0.62-3.92 ng g(-1), LOD S/N = 3), significantly improved recoveries (81.46-113.59%), and good reproducibility (RSD 2.63-9.87%, n = 5). The results indicated that this method can be applied for high throughput determination of organochlorine pesticides in tea leaves, and can be used for other dried plant samples. (C) 2019 Elsevier B.V. All rights reserved.
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