期刊
FOOD CHEMISTRY
卷 397, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2022.133785
关键词
Porous organic framework; Stir bar sorptive extraction; Carbamate pesticides; Corn and potato samples; High performance liquid chromatography
资金
- National Natural Science Foundation of China [21575107, 21775113]
- Hubei Provincial Key Laboratory of Environmental and Health Effects of Persistent Toxic Substances [PTS2019-03]
In this study, three porous organic frameworks (POFs) were synthesized and used for the extraction of four carbamate pesticides (CMPs). Among them, POF-c showed better adsorption performance. The adsorption mechanism was verified by characterization techniques and molecular dynamics simulation. Furthermore, a method combining POF-c coated stir bar sorptive extraction with high performance liquid chromatography and variable wavelength ultraviolet detector was developed for the analysis of CMPs in corn and potato samples.
Three porous organic frameworks (POFs) were synthesized by the reaction between phloroglucinol and 1,4-phthalaldehyde, 4,4 '-biphenyldialdehyde or tris-(4-formylphenyl) amine; the products are named as POF-a, POF-b and POF-c, respectively. They were used to prepare POFs coated stir bars respectively for the extrac-tion of four carbamate pesticides (CMPs). POF-c coated stir bar exhibited better adsorption performance than POF-a/b coated stir bar and commercial stir bars, probably due to the stronger conjugated structure and hy-drophobicity of POF-c, and resultant hydrophobic, pi-pi and hydrogen bonding interactions between them. The adsorption mechanism for target CMPs was verified by characterization techniques and molecular dynamics simulation. A method of POF-c coated stir bar sorptive extraction-high performance liquid chromatography -variable wavelength ultraviolet detector was developed for the analysis of four CMPs in corn and potato sam-ples. Under the optimal conditions, LODs of the method were between 0.017 and 0.048 mu g/L, and the linear range for four CMPs was 0.1/0.2-200 mu g/L.
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