Porous organic framework as coating for stir bar sorptive extraction of carbamate pesticides from corn and potato samples. (15th December 2022)

• Record Type: Journal Article
• Authors: Wang, Yuxin; He, Man; Chen, Beibei; Cao, Huiming; Liang, Yong; Hu, Bin
• Is Part Of: Food chemistry. Volume 397(2022)
• Publication Date: 2022-12-15
• Subjects: Porous organic framework -- Stir bar sorptive extraction -- Carbamate pesticides -- Corn and potato samples -- High performance liquid chromatography; Food -- Analysis -- Periodicals; Food -- Composition -- Periodicals; 664
• DOI: 10.1016/j.foodchem.2022.133785
• Languages: English
• ISSNs: 0308-8146

Abstract

Highlights: Three POFs were prepared with monomers containing different numbers of benzene rings. POF-c coated stir bar exhibited superior extraction efficiency and kinetics. Hydrophobic, π-π interaction and hydrogen bonding helped adsorbing CMPs on POFs. Adsorption mechanism was verified by FT-IR, XPS and molecular dynamics simulation. A method of SBSE-HPLC-VWD was proposed for CMPs analysis in corn and potatoes. Abstract: 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 extraction 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 hydrophobicity of POF-c, and resultant hydrophobic, π-π 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 samples. Under the optimal conditions, LODs of the method were between 0.017 and 0.048 μg/L, and the linear range for four CMPs was 0.1/0.2–200 μg/L.