气体中氮氧化物分析方法进展

Advances in Determination Methods for Nitrogen Oxides in Gas Samples

氮氧化物对环境的危害性比较大,工业生产或者大气环境中对氮氧化物的含量有着严格的控制指标。但不同气体样品中氮氧化物的分析方法由于其含量及基体的不同而不相同。介绍了气体中氮氧化物的仪器直接分析方法包括气相色谱法、化学发光法的特点及适用范围,着重讨论了大气中痕量NO_x的分析方法,主要是现场富集和实验室检测两个方面,比较了各种现场富集方法的工作特点,对这一领域的未来的可能发展方向作了探讨。

Nitrogen oxides are potential hazard. There are strict control indexes for NOx in industries and atmosphere quality. The determination method of NOx is different from its content and its matrix. The direct determination methods of NOx were introduced, which includes gas chromatography and Chemiluminescence Method. The characteristics and application ranges of the two methods are reviewed. The paper focuses on the determination method for trace NOx in gas samples including enrichment methods and determination methods. The characteristics of field enrichment method were compared. The works in this field is suggested.