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测定气体中微量氧浓度的方法有:热效应法、比色法、黄磷发光法和电化学法(即原电池法)等。热效应法、比色法灵敏度差;黄磷发光法虽然曾见应用,但操作不方便,需用设备多,因此应用上受到限制;原电池法是基于氧在原电池中引起的氧化还原反应为基础的方法,由于容易实现连续测定,同时不需要附加的电源或放大器就可以进行工作,而且日常维护量小,工作可靠,准确度较高,因此,近年来在工业生产和安全保护等方面获得了广泛的应用。原电池法根据不同的结构型式又可分湿式电池法和干式电池法两种。两者的区别在于原电池中的电解液是以液态填充于二电极
Determination of trace oxygen concentration in the gas methods are: thermal effect method, colorimetric, yellow phosphorus luminescence and electrochemical (ie, the original battery) and so on. Thermal effect method, colorimetric sensitivity is poor; Phosphorus luminescence law although see the application, but the operation is not convenient, the need for more equipment, so the application is limited; the original battery method is based on oxygen in the original battery caused by the redox reaction-based , Since it is easy to realize continuous measurement and can work without an additional power supply or amplifier and has a small amount of routine maintenance, reliable operation and high accuracy, it has been obtained in recent years in terms of industrial production and safety protection Wide range of applications. The original battery method according to different types of structure can be divided into two kinds of wet battery method and dry battery method. The difference between the two is that the electrolyte in the original battery is filled in the liquid state in the two electrodes