讨论了用氧化锆固体电解质氧浓差电池测定气体中氧含量时，还原性气体杂质影响测量准确度的原因，研究了净化杂质的技术。以不同方法配制样品气，验证了净化技术的效果及仪器测量的准确度和重复性。对仪器的结构、电测系统及其特性作了介绍。 In this paper, the reasons for the measurement accuracy of impurities affected by reductant gas in the determination of the oxygen content in the gas by the zirconia solid electrolyte oxygen concentration cell are discussed. The technology of purifying impurities is also studied. Sample gas was prepared in different ways to verify the effectiveness of the purification technique and the accuracy and repeatability of the instrument measurements. The structure of the instrument, electrical measurement system and its characteristics were introduced.