期刊
FOOD CHEMISTRY
卷 373, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2021.131572
关键词
Porous organic polymer; Proanthocyanidin; Magnetic solid-phase extraction; Neonicotinoid insecticides
资金
- National Natural Science Foundation of China [32072295, 31671930, 31571925, 31471643]
- Natural Science Foundation of Hebei Province [B2020204001, C2020204020, C2020204136, C2021204164, B2021204006, B2017204025, C2018204076]
- Food Processing Discipline Group of Hebei Agricultural University [2020-10]
- Scientific and Technological Research Foundation of the Department of Education of Hebei Province [ZD2021060, ZD2020196, ZD2016085, QN2019034]
PA-MOP, a magnetic nanoporous organic polymer based on natural proanthocyanidin, was synthesized and used for extracting neonicotinoid insecticides from various samples. The extraction mechanism is attributed to multiple interactions between PA-MOP and neonicotinoids, with hydrogen bonding, 7C-7C stacking, and electrostatic interactions playing major roles.
In this work, a natural proanthocyanidin (PA) based magnetic nanoporous organic polymer (named as PA-MOP) was successfully synthesized for the first time. The PA-MOP possessed high hydrophilic-surface, good magnetic responsiveness and high affinity for neonicotinoid insecticides. It was applied as an advanced magnetic sorbent for extraction of four neonicotinoids (thiamethoxam, imidacloprid, acetamiprid and thiacloprid) from environmental water, peach juice and honey samples prior to HPLC analysis. Under optimal conditions, the limits of detection for the analytes at S/N = 3 were 0.02-0.08 ng mL-1 for water, 0.03-0.10 ng mL(-1) for peach juice and 0.05-0.16 ng g(-1) for honey sample. The method recoveries were 80.0%-114.8%, with the relative standard deviations below 6.8%. The values of matrix effect were from-1.5% to-9.3%. Based on theory calculation, the extraction mechanism can be attributed to multiple interactions between the PA-MOP and the neonicotinoids, in which hydrogen bonding, 7C-7C stacking and electrostatic interactions are the major interactions.
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