电化学方法检测非电活性气体二氧化碳的若干问题研究

就非电活性气体ＣＯ２检测所遇到的若干电化学问题，诸如ＣＯ２电还原和直接电流法测定、Ｏ２的干扰以及ＣＯ２和Ｏ２气体的同时检测等，进行了系统的研究．先后提出并建立了微电流法、耗尽电解除氧法、调制电位脉冲－电流／库仑法等电化学测量方法，最终实现了常温下ＣＯ２和Ｏ２气体的快速电化学方法联合检测，既消除了Ｏ２的干扰，又无需ＣＯ２在电极上直接还原．

PROBLEMS ASSOCIATED WITH THE ELECTROCHEMICAL DETECTION OF ELECTRO INACTIVE GAS CARBON DIOXIDE

As part of the long term project of the research and development of electroanalytical methods for detection of electro inactive gas carbon dioxide at room temperature,several important electrochemical problems were systematically studied,such as electrore duction of CO 2 and direct measuring CO 2 by amperometry,O 2 interference with amperometric determination of CO 2,and simultaneous measurement of CO 2 and O 2.Some new electrochemical techniques of the microamperometry,exhausting electrolytic O 2 removal and modulated potential pulse amperometry/coulometry (MPPA/MPPC) were presented and established in order of priority,Finally,the rapid simultaneous detection of both CO 2 and O 2 in gas mixtures were realized using MPPA and MPPC.With this method,the cross intereference,when both O 2 and CO 2 are simultaneously present,can be eliminated,and there is no need for the direct reduction of CO 2 at electrodes.