Magnetic nanoparticles speed up mechanochemical solid phase extraction with enhanced enrichment capability for organochlorines in plants

Zhou, YY (Zhou, Yanying)[ 1 ] ; Zhu, J (Zhu, Jun)[ 2 ] ; Yang, J (Yang, Jing)[ 1 ] ; Lv, YQ (Lv, Youqi)[ 1 ] ; Zhu, YF (Zhu, Yuanfeng)[ 1 ] ; Bi, WT (Bi, Wentao)[ 1,3 ]*（毕文韬） ; Yang, XD (Yang, Xiaodi)[ 1 ]*（杨小弟）; Chen, DD (Chen, David Da Yong)[ 4 ]*（David Chen）

[ 1 ] Nanjing Normal Univ, Coll Chem & Mat Sci, Jiangsu Collaborat Innovat Ctr Biomed Funct Mat, Jiangsu Key Lab Biomed Mat, Nanjing 210023, Jiangsu, Peoples R China

[ 2 ] Chung Ang Univ, Dept Chem, 221 Heukseok Dong, Seoul 156756, South Korea

[ 3 ] Hebei Univ, Dept Prevent Med & Hlth Management, Baoding, Peoples R China

[ 4 ] Univ British Columbia, Dept Chem, Vancouver, BC V6T 1Z1, Canada

ANALYTICA CHIMICA ACTA，201908,1066, 49-57

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.

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https://www.sciencedirect.com/science/article/pii/S0003267019303526?via%3Dihub

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