总烃 total hydrocarbons (THC)

指在本标准规定的测定条件下，在气相色谱仪的氢火焰离子化检测器上有响应的气态有机化合物的总和。

非甲烷总烃 nonmethane hydrocarbons (NMHC)

指在本标准规定的测定条件下，从总烃中扣除甲烷以后其他气态有机化合物的总和（除非另有说明，结果以碳计）。

本标准规定了测定固定污染源废气中总烃、甲烷和非甲烷总烃的气相色谱法。

      本标准适用于固定污染源有组织排放废气中的总烃、甲烷和非甲烷总烃的测定。

当进样体积为1.0 ml时，本方法测定总烃、甲烷的检出限均为0.06 mg/m³（以甲烷计）,测定下限均为0.24 mg/m³（以甲烷计）；非甲烷总烃的检出限为0.07mg/m³（以碳计），测定下限为0.28mg/m³（以碳计）。

HJ 38-2017 硅烷化总烃和GDX-502甲烷柱 测试谱图：




HJ 38-2017 Silanized total hydrocarbons and GDX-502 methane column
HJ 38-2017 Silanized Total Hydrocarbons and GDX-502 Methane Column Details:

Name: Methane column

Methane determination column, made of stainless steel or hard glass, 2 m long, 4 mm inner diameter, packed with 60-80 mesh GDX-502 or GDX-104 support, or other equivalent packed columns





Name: total hydrocarbon column Total hydrocarbon determination column, made of stainless steel or hard glass, 2 m long, 4 mm inner diameter, filled with 60-80 mesh silanized glass beads, or other equivalent packed columns.



total hydrocarbons (THC)

Refers to the sum of gaseous organic compounds that respond on the hydrogen flame ionization detector of a gas chromatograph under the measurement conditions specified in this standard.

nonmethane hydrocarbons (NMHC)

Refers to the sum of other gaseous organic compounds after deducting methane from total hydrocarbons under the measurement conditions specified in this standard (unless otherwise stated, the results are in carbon terms).

This standard specifies the gas chromatography method for the determination of total hydrocarbons, methane and non-methane total hydrocarbons in waste gas from stationary pollution sources.

This standard is applicable to the determination of total hydrocarbons, methane and non-methane total hydrocarbons in the waste gas of fixed pollution sources.

When the injection volume is 1.0 ml, the detection limit of this method for the determination of total hydrocarbons and methane is 0.06 mg/m3 (calculated as methane), and the lower detection limit is 0.24 mg/m3 (calculated as methane); non-methane total hydrocarbons The detection limit is 0.07mg/m3 (calculated by carbon), and the lower limit of determination is 0.28mg/m3 (calculated by carbon).





HJ 38-2017 Silanized total hydrocarbons and GDX-502 methane column Test spectrum: