Oxidized multiwalled carbon nanotubes decorated with silver nanoparticles for fluorometric detection of dimethoate

被引：48

作者：

Hsu, Chun-Wei ^{[1
]}

Lin, Zhong-Yi ^{[1
]}

Chan, Tzu-Yi ^{[1
]}

Chiu, Tai-Chia ^{[1
,2
]}

Hu, Cho-Chun ^{[1
,2
]}

机构：

[1] Natl Taitung Univ, Dept Appl Sci, Taitung, Taiwan

[2] Natl Taitung Univ, Agr Prod Inspect Ctr, Taitung, Taiwan

来源：

FOOD CHEMISTRY | 2017年 / 224卷

关键词：

Nanosensor; Silver nanoparticles; Carbon nanotube; Peroxidase-like catalyst; Dimethoate; TANDEM MASS-SPECTROMETRY; ORGANOPHOSPHORUS PESTICIDES; GOLD NANOPARTICLES; RAPID DETECTION; GC-MS; ASSAY; RESIDUES; WATER; ACETYLCHOLINESTERASE; RECOGNITION;

D O I：

10.1016/j.foodchem.2016.12.095

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

A novel method for the detection of dimethoate based on the peroxidase-like activity of silver-nanoparticles-modified oxidized multiwalled carbon nanotubes (AgNPs/oxMWCNTs) has been developed. The synthesized AgNPs/oxMWCNTs showed excellent peroxidease-like catalytic activity in hydrogen peroxide-Amplex red (AR) system (AR is oxidized to resorufinat, with the resorufin fluorescence at 584 nm being used to monitor the catalytic activity). After dimethoate was added to AgNPs/oxMWCNTs, the interaction between dimethoate and the AgNPs inhibited the catalytic activity of AgNPs/oxMWCNTs. The decrease in fluorescence was used for the detection of dimethoate in the range of 0.01-0.35 mu g mL(-1) (R-2 = 0.998) with a detection limit of 0.003 mu g mL(-1) (signal/noise = 3). This method exhibited good selectivity for the detection of dimethoate even in the presence of high concentration of other pesticides. Consequently, the method was applied to measure the concentration of dimethoate residue in lake water and fruit, thus obtaining satisfactory results. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：353 / 358

页数：6

共 36 条

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