Dual-mode detection of organophosphate pesticides in pear and Chinese cabbage based on fluorescence and AuNPs colorimetric assays

文献类型： 外文期刊

第一作者： Yu, He

作者： Yu, He;Wang, Miao;Cao, Jing;She, Yongxin;Zhu, Yongan;Wang, Jing;Yu, He;Wang, Miao;Cao, Jing;She, Yongxin;Zhu, Yongan;Wang, Jing;Ye, Jiaming;Abd El-Aty, A. M.;Abd El-Aty, A. M.;Abd El-Aty, A. M.;Hacimuftuoglu, Ahmet;Wang, Jing;Lao, Shuibing

作者机构：

关键词： Fluorescence; Colorimetric; Dual-mode detection; Organophosphate pesticides; Residue detection; Enzyme inhibition

期刊名称：FOOD CHEMISTRY （ 影响因子：7.514； 五年影响因子：7.516 ）

ISSN： 0308-8146

年卷期： 2021 年 364 卷

页码：

收录情况： SCI

摘要： Herein, a dual-mode method based on fluorescent and colorimetric sensor was developed for determination of organophosphate pesticides (OPs). In this study, indoxyl acetate (IDA) was hydrolyzed by esterase into indophenol. Indophenol leads to changes in fluorescence signal and aggregation of gold nanoparticles (AuNPs); ultimately changing the color from red to blue. When OPs exist, the formation of indophenol was inhibited. With increasing the concentrations of OPs, the enhancement rate of fluorescence signal decreases, and the color change of AuNPs weakened gradually. The assay was applied for determination of dichlorvos, trichlorfon, and paraoxon, and the limits of detection (LODs) were 0.0032 mg/kg, 0.0096 mg/kg, and 0.0074 mg/kg (fluorometric assay), and 0.0120 mg/kg, 0.0224 mg/kg, and 0.0106 mg/kg (colorimetric assay), respectively. Finally, such a convenient and sensitive sensing assay was successfully applied for quantification of OPs in pear and Chinese cabbage with good recoveries ranged between 80.19 and 116.93%.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序