Du Juanli, Wu Hao, Jing Xu, Yu Yonghe, Yan Zhisheng, Zhang Jianhai
College of Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, China.
School of Chemistry and Material Science, Shanxi Normal University, Taiyuan 030001, China.
Foods. 2022 Oct 8;11(19):3130. doi: 10.3390/foods11193130.
Developing a simple and effective method for measuring carbaryl residues in food is urgent due to its widespread use and the associated health risks in agriculture, as well as various defects in existing detection techniques. The COF (TpPa-NH)@FeO nanocomposite (amino modification) was synthesized via a two-step method and used as an adsorbent for the extraction of carbaryl from food samples in this study. The results indicated that COF (TpPa-NH)@FeO can rapidly and successfully capture carbaryl directly from samples via π-π stacking and hydrophobic interactions, achieving maximum adsorption within 5 min under a small adsorbent quantity using a fluorescence spectrophotometer. Under the optimized conditions, carbaryl exhibited good linearity in the range of 0.2-120 µg·kg, and the limit of detection was 0.012 µg·kg. The recoveries of the samples were 96.0-107.4%. This method has broad application prospects for the monitoring of carbaryl in food.
由于西维因在农业中的广泛使用及其相关健康风险，以及现有检测技术存在的各种缺陷，开发一种简单有效的食品中西维因残留量检测方法迫在眉睫。本研究通过两步法合成了COF（TpPa-NH）@FeO纳米复合材料（氨基修饰），并将其用作吸附剂从食品样品中萃取西维因。结果表明，COF（TpPa-NH）@FeO能够通过π-π堆积和疏水相互作用直接从样品中快速成功地捕获西维因，在使用荧光分光光度计且吸附剂用量较少的情况下，5分钟内即可达到最大吸附量。在优化条件下，西维因在0.2-120 µg·kg范围内呈现良好的线性关系，检测限为0.012 µg·kg。样品回收率为96.0-107.4%。该方法在食品中西维因监测方面具有广阔的应用前景。
