Phenylboronic acid-functionalized cross-linked chitosan magnetic adsorbents for the magnetic solid-phase extraction of benzoylurea pesticides |
| |
Authors: | Xiaoyan Cui Yujiao Wang Yumei Yan Zilin Meng Runhua Lu Haixiang Gao Canping Pan Xinlin Wei Wenfeng Zhou |
| |
Institution: | 1. Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, P. R. China;2. Department of Food Science & Technology, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, P. R. China
Institute of Food Engineering, College of Life Science, Shanghai Normal University, Shanghai, P. R. China |
| |
Abstract: | In this study, a 4-formylphenylboronic acid-modified cross-linked chitosan magnetic nanoparticle (FPBA@CCHS@Fe3O4) was fabricated. The synthesized material was utilized as the magnetic solid-phase extraction adsorbent for the enrichment of six benzoylurea pesticides. In addition to B-N coordination, FPBA@CCHS@Fe3O4 interacts with benzoylureas through hydrogen bonds and π-π stacking interaction on account of rich active groups (amino and hydroxyl) and aromatic rings in structure. Compared to traditional extraction methods, less adsorbent (20 mg) and reduced extraction time (3 min) were achieved. The adsorbent also exhibited good reusability (no less than 10 times). Coupled with a high-performance liquid chromatography–diode array detector, satisfactory recoveries (89.1–103.9%) and an acceptable limit of detection (0.2–0.7 μg/L) were obtained. Under optimized conditions, the established method was successfully applied to the tea infusion samples from six major tea categories with acceptable recoveries ranging from 76.8 to 110%, indicating its application potential for the quantitative detection of pesticides in complex matrices. |
| |
Keywords: | benzoylurea insecticide chitosan magnetic solid-phase extraction tea infusion |
|
|