化学
分子印迹聚合物
乙二醇二甲基丙烯酸酯
色谱法
吸附
萃取(化学)
固相萃取
吸附剂
高效液相色谱法
柠檬酸
纤维素
沉淀聚合
选择性吸附
甲基丙烯酸
聚合物
聚合
选择性
有机化学
自由基聚合
催化作用
作者
Tittaya Boontongto,Yanawath Santaladchaiyakit,Rodjana Burakham
出处
期刊:Talanta
[Elsevier]
日期:2024-04-01
卷期号:270: 125536-125536
标识
DOI:10.1016/j.talanta.2023.125536
摘要
Biodegradable molecularly imprinted polymer-coated paper (MIP@paper) was effectively produced by polymerization using azinphos-methyl as a template molecule, terephthalic acid as a functional monomer, ethylene glycol dimethacrylate as a cross-linker, and aqueous ethanol as a green porogenic solvent. The material was subsequently composited onto cellulose paper, which served as the natural substrate, by dip coating with the aid of chitosan and citric acid natural adhesive. The properties, such as static and dynamic adsorption, selectivity, and reusability, were assessed. At rapid adsorption equilibrium (10 min), the MIP@paper had a high adsorption capacity in the range of 2.5–3.7 mg g−1 and good recognition with imprinting factors up to 2.1. In addition, the proposed MIP@paper was utilized efficiently as a sorbent for dispersive solid phase extraction (d-SPE) of eight organophosphorus pesticides (OPPs) prior to high-performance liquid chromatography (HPLC) analysis. The d-SPE-HPLC method displayed low detection limits of 1.2–4.5 μg kg−1 and significant enrichment factors (up to 320-fold). The proposed method was effectively applied for the determination of OPP residues in agricultural products, including fruits, vegetables, and cereal grains, with satisfactory spiked recoveries (80.1–119.1 %). Thus, the MIP@paper material provided a selective and environmentally favorable method for extracting and determining organophosphorus pesticides.
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