Novel Fe<sub>3</sub>O<sub>4</sub>@metal-organic framework@polymer core-shell-shell nanospheres for fast extraction and specific preconcentration of nine organophosphorus pesticides from complex matrices
Wan, Mengfei, Xiang, Fachun, Liu, Zhongdong, Guan, Denggao, Shao, Yong, Zheng, Lufei, Jin, Maojun, She, Yongxin, Cao, Liping, Jin, Fen, Chen, Rui, Wang, Shanshan, Wu, Yijun, Abd El-Aty, A. M., Wang, Jing
Herein, a novel core-shell-shell magnetic nanosphere denoted as Fe3O4@ZIF-8@polymer was fabricated by sequential in situ self-assembly and precipitation polymerization for effective magnetic solid-phase extraction of nine organophosphorus pesticides (OPPs) from river water, pear, and cabbage samples. The integrated Fe3O4@ZIF-8@polymer featured convenient magnetic separation property and excellent multi-target binding ability. More importantly, the functional polymer coating greatly improved the extraction performance of Fe3O4@ZIF-8 for OPPs, thus facilitating the simultaneous determination of trace OPP residues in real samples. The developed MPSE-LC-MS/MS method exhibited good linearity (R-2 >= 0.9991) over the concentration range of 0.2-200 mu g L-1, low limits of detection of 0.0002-0.005 mu g L-1 for river water and 0.006-0.185 mu g kg(-1) for pear and cabbage, satisfactory precision with relative standard deviations <= 9.7% and accuracy with recoveries of 69.5-94.3%. These results highlight that the combination of polymers with MOFs has great potential to fabricate excellent adsorbents for high-throughput analysis of various contaminants in complex matrices.
- Journal
- FOOD CHEMISTRY
- Year
- 2021
- Volume
- 365
- ISSN
- 0308-8146
- eISSN
- 1873-7072
- DOI
- 10.1016/j.foodchem.2021.130485
- WoS UID
- WOS:000687703100005