Hot-wire amperometric monitoring of flowing streams
Hot-wire amperometric monitoring of flowing streams
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DOI：
10.1016/s0039-9140(99)00224-6
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发表时间：
2000-01-10
期刊：
影响因子：
6.1
通讯作者：
Tian, BM
中科院分区：
文献类型：
--
作者：
Wang, J;Jasinski, M;Tian, BM
本文介绍了一种热线电化学流量检测器的设计，以及从局部温度升高的影响，主要是热诱导对流，流动流的电流监测后产生的优点。提出了一种新的流体动力学调制伏安法，即在工作电极温度被调制的同时，溶液流速保持恒定。影响响应的因素，包括流速，温度脉冲，或施加的电位，进行了研究。热线操作的结果也在一个显着增强的流动注射安培响应。与加热电极观察到的最小的流速依赖性应有利于流波动的自然对流的在线监测，以及各种原位遥感应用。(C)2000爱思唯尔科技有限公司。保留所有权利。
This paper describes the design of a hot-wire electrochemical flow detector, and the advantages accrued from the effects of locally increased temperature, mainly thermally induced convection, upon the amperometric monitoring of flowing streams. A new hydrodynamic modulation voltammetric approach is presented, in which the solution flow rate remains constant while the temperature of the working electrode is modulated. Factors influencing the response, including the flow rate, temperature pulse, or applied potential, have been investigated. The hot-wire operation results also in a significant enhancement of the flow injection amperometric response. The minimal flow rate dependence observed with the heated electrode should benefit the on-line monitoring of streams with fluctuated natural convection, as well as various in-situ remote sensing applications. (C) 2000 Elsevier Science B.V. All rights reserved.