通入特定浓度甲烷和丙烷混合标气，参照 HJ 168-2010 附录 A.1.1

计算甲烷和非甲烷总烃方法检出限，要求甲烷检出限≤ 100 ppb、非甲

烷总烃检出限≤ 20 pp

待仪器稳定后，通入含 60%相对湿度的高纯零空气，要求空白样

品甲烷浓度≤ 100 ppb、非甲烷总烃浓度≤ 20 ppbC。

1) 分别通入 1000 ppbC 丙烷、甲苯、乙酸乙酯、三氯乙烯等标准气

体，根据色谱图按照公式（1）计算拖尾因子

环境空气非甲烷总烃标准气体 图片：




Ambient air non-methane total hydrocarbon standard gas
Ambient air non-methane total hydrocarbon standard gas Details:

Standard gas: propane, toluene, ethyl acetate, trichloroethylene
Packing: aluminum alloy cylinder
Volume: 8L, 4L, 2L
Application: Technical regulations for continuous automatic monitoring of non-methane total hydrocarbons in ambient air


Inject the mixed standard gas of methane and propane with specific concentration, refer to HJ 168-2010 appendix A.1.1
Calculating the detection limit of methane and non-methane total hydrocarbons, the detection limit of methane is required to be ≤ 100 ppb, non-methane
Detection limit of total alkanes ≤ 20 pp

After the instrument is stable, pass in high-purity zero air containing 60% relative humidity, and a blank sample is required.
Product methane concentration ≤ 100 ppb, non-methane total hydrocarbon concentration ≤ 20 ppbC.

1) Pass 1000 ppbC standard gas such as propane, toluene, ethyl acetate, trichloroethylene, etc.
According to the chromatogram, the tailing factor