中文摘要：本文开发了一个基于对硝基苯胺二硫代氨基甲酸酯修饰金纳米比色传感器的简单、特异性的微量紫外-可见吸收光谱检测方法，用于检测水和食物中的喹硫磷农药残留。在优化条件下，喹硫磷残留吸收率和残留浓度之间的线性范围为1.0-1000 μM，相关系数为0.982。检测限为0.35μM，低于其他检测技术。采用该方法检测环境水、水果和谷物中硫磷杀虫剂残留，获得了较好的回收率值。
外文摘要：A simple and selective p-nitroaniline dithiocarbamate capped gold nanoparticles (p-NA-DTC-Au NPs) based colorimetric sensor was developed for the detection of quinalphos in water and food samples. The method was based on the color change of p-NA-DTC-Au NPs from red to blue with the addition of quinalphos to p-NA-DTC-Au NPs that caused a red-shift in their surface plasmon resonance (SPR) band from 522 to 694 nm due to the inter-particle coupling effect. Under the optimized conditions, a linear relationship between the absorption ratio (A(522)/A(694)) and quinalphos concentration was found in the range of 1.0-1000 mu M with correlation coefficient (R-2) of 0.982. The detection limit of quinalphos was 0.35 mu M, which is lower than the other analytical techniques. Moreover, the proposed nanosensor was successfully applied to the detection of quinalphos in environmental water, fruit and grain samples with good recoveries. (C) 2016 Elsevier B.V. All rights reserved.
外文关键词：Quinalphos, p-NA-DTC-Au NPs, UV visible spectroscopy, DLS and real samples
作者：Rohit, Jigneshkumar V.; Basu, Hirakendu; Singhal, Rakesh Kumar; Kailasa, Suresh Kumar
作者单位：SV Natl Inst Technol, Dept Appl Chem, Surat 395007, India.
期刊名称：SENSORS AND ACTUATORS B-CHEMICAL
期刊影响因子：4.758
出版年份：2016
出版刊次：12
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