Remote underwater electrochemical sensing system for detecting explosive residues in the field
Remote underwater electrochemical sensing system for detecting explosive residues in the field
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DOI：
10.1016/j.snb.2004.08.015
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发表时间：
2005-04-29
影响因子：
8.4
通讯作者：
Fries, D
中科院分区：
文献类型：
--
作者：
Fu, XJ;Benson, RF;Fries, D
介绍了一种用于海洋环境中爆炸物2，4，6-三硝基甲苯(TNT)检测的移动式水下电化学传感系统。该检测技术以碳纤维为工作电极，采用快速灵敏的方波伏安法进行扫描。这种潜水式、脉冲伏安法、三电极电化学传感器安装在具有视觉检测能力的遥控水面车辆上。视觉的使用通过允许检测和放置在检测限值以下来增强传感器包装。无线通信单元提供实时监视和检测的能力。该检测方案首先将炸药分子上的硝基逐步还原为羟胺，然后再将后者转化为胺基。还原电位为特定炸药提供了方法选择性，每单位时间所需的电流决定了目标炸药在水介质中的浓度。获得了与实验室仪器测量结果相当的现场试验数据。(C)2004爱思唯尔B.V.保留所有权利。
A mobile remote underwater electrochemical sensing system is described in this paper for detecting the explosive 2,4,6-trinitrotoluene (TNT) in the marine environment. The detection technology relies on using a carbon fiber as the working electrode, and applying a rapid and sensitive square-wave voltammogram for scanning. This submersible, pulsed-voltammetric, 3-electrode electrochemical sensor is mounted to a remotely operated surface vehicle with vision detection capability. The use of vision enhances the sensor package by allowing detection of and placement below detection limits. A wireless communication unit provides the ability to monitor and detect in real time. The detection scheme is based upon a stepwise reduction of the nitro aromatic groups on the explosive molecule first to hydroxylamines, and then followed by the conversion of the later to amine groups. The reduction potentials provide the method selectivity for a specific explosive, and the current required per unit time determines the concentration of the targeted explosive in an aqueous media. Successful field test data have been obtained which are comparable to those measured with laboratory instruments. (c) 2004 Elsevier B.V. All rights reserved.