在大气化学污染测定中,尤其是在潜艇、飞船座舱及其地面模拟设备等特殊气体环境中,需要对微量化学污染进行定性定量分析。但由于气相色谱仪灵敏度的限制,一般取样方法不能完全满足工作的需要,而必须采用浓缩取样装置。在各种浓缩取样装置中,最常用的是活性碳吸附装置和冷冻浓缩装置。前者吸附容量 In the determination of atmospheric chemical pollution, especially in special gas environments such as submarines, spacecraft cockpit and ground simulation equipment, qualitative and quantitative analysis of trace chemical pollution needs to be carried out. However, due to the limitations of gas chromatography sensitivity, the general sampling method can not fully meet the needs of work, but must be concentrated sampling device. Of the various concentrated sampling devices, activated carbon adsorption devices and freeze-concentration devices are the most commonly used. The former adsorption capacity