Multicolor enzyme-linked immunosorbent sensor for sensitive detection of organophosphorus pesticides based on TMB2+-mediated etching of gold nanorods

文献类型： 外文期刊

第一作者： Yin, Xiao-Li

作者： Yin, Xiao-Li;Gu, Hui-Wen;Zhou, Yu;Liu, Yun Qing;Zhang, Qi;Zhang, Zhao Wei;Li, Hui;Li, Pei-Wu;Li, Pei-Wu;Li, Pei-Wu;Li, Pei-Wu;Li, Pei-Wu

作者机构：

关键词： Organophosphorus pesticide; Gold nanorods; Sensor; Multicolorimetric detection; TMB2+-mediated etching

期刊名称：MICROCHEMICAL JOURNAL （ 影响因子：4.821； 五年影响因子：4.364 ）

ISSN： 0026-265X

年卷期： 2021 年 168 卷

页码：

收录情况： SCI

摘要： A multicolor enzyme-linked immunosorbent sensor was constructed to detect organophosphates pesticides (OPs) on base of TMB2+-mediated AuNRs etching. As the etching progresses, a rainbow-like color responses was generated. The naked eye limit of detection (LOD) of the sensing system is 0.25 ng mL-1. In particular, the longitudinal localized surface plasmon resonances (LSPR) peak shift of AuNRs is linearly correlated with the logarithm of OPs concentration in range of 104 to 5 x 106 pg mL-1 for parathion-methyl and fenitrothion, 5 x 104 to 107 pg mL-1 for fenthion, respectively. Compared with reported methods, this sensor displayed satisfactory linear ranges and detection limits. Average recoveries of this method ranged from 73.28% to 98.08% and relative standard deviations (RSDs) were below 8.0% as for food samples analysis without complicated pretreatments. Remarkably, the developed multicolor enzyme-linked immunosorbent sensor is capable of providing accurate and reliable assay for OPs in complex food samples.

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