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Porous organic framework as coating for stir bar sorptive extraction of carbamate pesticides from corn and potato samples
Food Chemistry ( IF 8.8 ) Pub Date : 2022-07-26 , DOI: 10.1016/j.foodchem.2022.133785
Yuxin Wang 1 , Man He 1 , Beibei Chen 1 , Huiming Cao 2 , Yong Liang 2 , Bin Hu 1
Affiliation  

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.



中文翻译:

多孔有机骨架作为涂层用于搅拌棒吸附萃取玉米和马铃薯样品中的氨基甲酸酯类农药

间苯三酚与1,4-苯二甲醛、4,4'-联苯二醛或三-(4-甲酰基苯基)胺反应合成了三种多孔有机骨架(POFs);产品分别命名为POF-a、POF-b和POF-c。它们分别用于制备 POFs 涂层搅拌棒,用于萃取四种氨基甲酸酯类农药 (CMPs)。POF-c 涂层搅拌棒比 POF-a/b 涂层搅拌棒和商业搅拌棒表现出更好的吸附性能,这可能是由于 POF-c 更强的共轭结构和疏水性,以及由此产生的疏水性、π-π 和氢键相互作用他们。通过表征技术和分子动力学模拟验证了目标CMP的吸附机制。建立了POF-c包覆搅拌棒吸附萃取-高效液相色谱-变波长紫外检测器分析玉米和马铃薯样品中4种CMPs的方法。在最佳条件下,该方法的 LOD 介于 0.017 和 0.048 μg/L 之间,四种 CMP 的线性范围为 0.1/0.2-200 μg/L。

更新日期:2022-07-30
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