气相色谱法测定空气和废气中8种烃类化合物

建立了针筒采样、大口径毛细管柱分离、气相色谱-氢火焰离子化检测器测定空气和废气中甲烷、乙烷、乙烯、乙炔、丙烷、异丁烷、正丁烷和正戊烷等8种烃类化合物的方法.优化了试验条件,方法线性良好,甲烷、乙烯、乙炔、乙烷、丙烷、异丁烷、正丁烷和正戊烷的检出限分别为0.09 mg/m3、0.20 mg/m3、0.18 mg/m3、0.29 mg/m3、0.28 mg/m3、0.37 mg/m3、0.16 mg/m3和0.56 mg/m3,RSD＜8.0%,加标回收率为80.5%～104%.

Determ ination of 8 Hydrocarbon Compoundsin AirandW aste Gasby Gas Chromatography

The method was established for determination of methane, ethane, ethylene, acetylene, propane, isobutene, butane and pentane in the air and waste gas by the syringe sampling, the wild capillary tubes separation and detection of gas chromatography with hydrogen flame ionization detector. The test condition was optimized and good relationship between the 8 compounds concentrations and instrument response. The detection limits of those compounds were methane 0.09 mg/m^3 , ethane 0.20 mg/m^3 , ethylene 0.18 mg/m^3 , acetylene 0.29 mg/m^3 , propane 0.28 mg/m^3 , isobutene 0.37 mg/m^3 , butane 0.16 mg/m^3 , pentane 0.56 mg/m^3. The RSD was less than 8.0% and the recoveries were from 80.5% to 104%.