色谱法
新烟碱
噻虫胺
化学
啶虫脒
萃取(化学)
固相萃取
检出限
高效液相色谱法
益达胺
残留物(化学)
噻虫嗪
聚丙烯酸
有机化学
聚合物
杀虫剂
农学
生物
作者
Lingzhi Liu,Ronggang Zhou,Yongli Li,Yue-Hong Pang,Xiao-Fang Shen,Jun Liu
标识
DOI:10.1016/j.foodchem.2024.138357
摘要
Neonicotinoids, the fastest-growing class of insecticides, have posed a multi-media residue problem with adverse effects on environment, biodiversity and human health. Herein, covalent organic framework-sodium alginate-Ca2+-polyacrylic acid composite beads (CACPs), facilely prepared at room temperature, were used in convenient dispersive solid-phase extraction (dSPE) and combined with high-performance liquid chromatography (HPLC) for the detection of five neonicotinoid insecticides (thiamethoxam, acetamiprid, dinotefuran, clothianidin, imidacloprid). CACPs can be completely separated within 1 min without centrifugation. After seven adsorption/desorption cycles, it maintained high extraction efficiencies (>90 %). The developed method exhibited a wide linear range (0.01 ∼ 10 μg mL−1), low limits of detection (LODs, 0.0028 ∼ 0.0031 mg kg−1), and good repeatability (RSD ≤ 8.11 %, n = 3). Moreover, it was applied to the determination of five neonicotinoids in fruit and vegetables (peach, pear, lettuce, cucumber, tomato), and recoveries ranged from 73.6 % to 116.2 %.
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