Electroactive nanoporous gold driven electrochemical sensor for the simultaneous detection of carbendazim and methyl parathion
Electroactive nanoporous gold driven electrochemical sensor for the simultaneous detection of carbendazim and methyl parathion
复制标题
用于同时检测多菌灵和甲基对硫磷的电活性纳米孔金驱动电化学传感器
DOI：
10.1016/j.electacta.2019.04.120
复制
发表时间：
2019-07-01
影响因子：
6.6
通讯作者：
Liu, Honglei
中科院分区：
文献类型：
--
作者：
Gao, Xinyu;Gao, Yan;Liu, Honglei
甲基对硫磷（MP）和多菌灵（CBM）等农药因其高毒性、共存和在环境中的持久性而被广泛使用，对人类健康构成严重威胁。因此，开发一种多农药检测平台，实现对多种农药的同时检测就显得十分迫切。本文选择具有独特结构和功能特性的纳米多孔金（NPG）作为识别元件构建电化学传感器。这是NPG作为活性电催化剂首次实现了MP和CBM的同时电化学检测，峰值电位分离达到0.70 V。MP和CBM在0.5 ~ 150 μ M和3.0 ~ 120 μ M浓度范围内线性响应良好，MP和CBM的灵敏度分别为186.53 μ A mM(-1) cm（-2）和484.51 μ A mM(-1) cm(-2)， MP和CBM的检出限分别为0.02 μ M和0.24 μ M。此外，NPG/GCE电极在同时检测MP和CBM方面具有较强的特异性、选择性和抗干扰能力。环境水样分析也取得了满意的结果，表明NPG/GCE电极是同时检测MP和CBM的可靠方法。(C) 2019 Elsevier Ltd.版权所有。
The extensive use of pesticides such as methyl parathion (MP) and carbendazim (CBM) has posed serious risks to human health due to their high toxicity, coexistence, and persistence in the environment. Therefore, it is very urgent to develop a multipesticide detection platform to realize the simultaneous detection of many kinds of pesticides. Here, nanoporous gold (NPG) with unique structural and functional properties was selected as a recognition element to construct an electrochemical sensor. This is the first time that NPG, as an active electrocatalyst, achieved the simultaneous electrochemical detection of MP and CBM, with a large peak potential separation of 0.70 V. For the detection of MP and CBM, good linear responses were observed in large concentration ranges of 0.5-150 mu M for MP and 3.0-120 mu M for CBM, with high sensitivities of 186.53 mu A mM(-1) cm(-2) for MP and 484.51 mu A mM(-1) cm(-2) for CBM, as well as low detection limits of 0.02 mu M for MP and 0.24 mu M for CBM. Additionally, the NPG/GCE electrode presented strong specificity, selectivity, and anti-interference capability in the simultaneous detection of MP and CBM. The environmental water sample analysis was also achieved with satisfactory results, which made the NPG/GCE electrode a reliable method for the simultaneous electrochemical detection of MP and CBM. (C) 2019 Elsevier Ltd. All rights reserved.