GDX-502填充柱 测定固定污染源废气中非甲烷总烃

固定相：高分子小球

GDX-502，2m*3mm，2m*4mm，2m*1/8，60-80目

甲烷柱

总烃柱

2m*3mm，2m*4mm，2m*1/8，硅烷化玻璃微球

滕州市浩瀚色谱仪器技术服务有限公司，以HJ/T 38-1999为基础,针对气相色谱法测定污染源废气中非甲烷总烃存在的诸多问题进行探讨,在总烃出峰峰形、废气氧峰值测定、高沸点物质干扰等方面做了研究试验。结果表明,1ml定量环容易造成总烃出现平头峰,改成0.25ml定量环能得到好的峰形;非甲烷总烃的检出限为0.04 mg/m~3(以碳计);氧峰值与氧量具有线性关系,应根据氧量判断氧峰值大小,而不是统一扣除除烃空气氧峰值;废气中存在高沸点组分时,容易吸附于采样容器内壁,将样品加热100℃再测试可提高该组分的检出率。

测定固定污染源废气中非甲烷总烃 图片：



Determination of non-methane total hydrocarbons in fixed source waste gas
Determination of non-methane total hydrocarbons in fixed source waste gas Details:

Stationary phase: polymer pellet
GDX-502, 2m*3mm, 2m*4mm, 2m*1/8, 60-80 mesh
Methane column

Total hydrocarbon column
2m*3mm, 2m*4mm, 2m*1/8, silanized glass microspheres

Tengzhou Haohao Chromatography Instrument Technology Service Co., Ltd., based on HJ/T 38-1999, discusses the problems of gas chromatography in the determination of non-methane total hydrocarbons in waste gas from pollution sources. Research and tests have been carried out on the determination and interference of high-boiling substances. The results show that the 1ml loop is likely to cause a flat peak in the total hydrocarbons, and a good peak shape can be obtained by changing to a 0.25 ml loop; the detection limit of non-methane total hydrocarbons is 0.04 mg/m~3 (calculated as carbon); It has a linear relationship with the oxygen content. The oxygen peak value should be judged according to the oxygen amount, instead of uniformly deducting the peak of the oxygen removal air. When there is a high boiling component in the exhaust gas, it is easy to adsorb to the inner wall of the sampling container, and the sample is heated to 100 ° C and then tested. The detection rate of the component can be increased.

Determination of non-methane total hydrocarbons in fixed source waste gas