通入特定濃度甲烷和丙烷混合標氣，參照 HJ 168-2010 附錄 A.1.1

計算甲烷和非甲烷總烴方法檢出限，要求甲烷檢出限≤ 100 ppb、非甲

烷總烴檢出限≤ 20 pp

待儀器穩(wěn)定后，通入含 60%相對濕度的高純零空氣，要求空白樣

品甲烷濃度≤ 100 ppb、非甲烷總烴濃度≤ 20 ppbC。

1) 分別通入 1000 ppbC 丙烷、甲苯、乙酸乙酯、三氯乙烯等標準氣

體，根據(jù)色譜圖按照公式（1）計算拖尾因子

環(huán)境空氣非甲烷總烴標準氣體 圖片：




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