气相色谱法检测废气中甲烷、非甲烷总烃的问题研究

气相色谱法检测废气中甲烷、非甲烷总烃的方法存在诸多问题。针对标准参考气体的选择、采样方式、样品保存、配气方式、仪器配置等方面做了重点研究。结果表明,使用甲烷作为标准参考气体最佳,根据污染源的实际状况,可选择动力采样或玻璃注射器手动采样。样品气保存在惰性气袋中比玻璃注射器更好,实验分析更推荐双柱配置的气相色谱,手工配制标准气系列、使用填充柱也可很好的满足检测的质量要求。

Study on the Determination of Methane and Non Methane Hydrocarbons by Gas Chromatography

The determination method of methane and non methane hydrocarbons by gas chromatography have many problems. Studies focus on standard reference gas selection, sampling methods, sample preservation, standard gas dilution method and instrument configuration. The results show that: Methane is very suitable as a standard reference gas. According to the different sources of pollution, power sampling or manual sampling by using glass syringes can be selected. Gas chromatography with two columns is better. Manual diluted standard gas, using the packed column can also meet the requirements of the quality detection.