调制电势脉冲型O_2/CO_2双组份电化学气体传感器研究

A Modulated Potential Pulsed Electrochemical Gas Sensor for Rapid Simultaneous Detection of Oxygen and Carbon Dioxide

基于直接电流法检测ＣＯ２及Ｏ２干扰机理的研究，提出了调制电势脉冲－电流／库仑法快速同时测定Ｏ２和ＣＯ２的新原理．使用微电极并融合计算机控制的快速电势调制技术，建立了调制电势脉冲型Ｏ２／ＣＯ２双组份电化学气体传感器的原型装置，实现了常温下Ｏ２和 ＣＯ２气体的快速同时检测．通过软件编程设计特定的电化学激励信号，保持传感器工作的长期稳定性。

Based on studies of the direct amperometric detection of electro-inactive gas CO2 and the mechanism of O2 interfence, a novel modulated potential pulsed electrochemical gas sensor which combines computer--controlled fast modulated potential technique with microelectrode is developed for the rapid, simultaneous detection of O2 and CO2 in gas mixtures at room temperature. Experimental results. show that this double--component gas sensor can be applied to real--time and dynamic monitoring O2 and CO2 simultaneously with satisfactory accuracy, response time, detection range and long term stability.