用于实时动态检测多组份气体的 电化学传感器系统的设计与实现

本工作以氧和二氧化碳混合气体(呼吸气体)的实时、动态检测为研究实例，依据O2和CO2气体发生交叉反应的动力学特性和暂态电化学原理，使用单个微电极融合计算机控制的快速电势调制技术，设计并构建了一类全新的集信号提取、转换、处理与结果显示等功能于一体的电化学多组份气体传感器系统；一次测量时间快达几十毫秒，能保持连续检测的稳定性。对暂态电化学响应机制、检测精度、测量速度和连续检测的长期稳定性进行了讨论。

Design and Implementation of the Electrochemical Multi2component Gas Sensor System for Real2time and Dynamic De

According to the kinetic characteristics of cross reactions for coexisting multi component gases monitored and the transient electrochemistry principles, using single working microelectrode and by combining computer controlled fast modulated potential technique with microelectrode method, a kind of all-new electrochemical multi component gas sensor system integrated with acquisition, converting, processing and display of signals has been designed and constructed. For example of real time and dynamic detection of both O 2and CO 2 (respiratory gases), the total time required for the measurement was in the order of a few decamilliseconds. The stability of this approach was rather good. Mechanism for transient electrochemical response, detection accuracy, measuring rate and long term stability of continuous monitoring were discussed in this paper.