固定相：高分子小球

GDX-502，2m*3mm，2m*4mm，2m*1/8，60-80目

甲烷柱

總烴柱

2m*3mm，2m*4mm，2m*1/8，硅烷化玻璃微球

滕州市浩瀚色譜儀器技術(shù)服務(wù)有限公司，以HJ/T 38-1999為基礎(chǔ),針對氣相色譜法測定污染源廢氣中非甲烷總烴存在的諸多問題進行探討,在總烴出峰峰形、廢氣氧峰值測定、高沸點物質(zhì)干擾等方面做了研究試驗。結(jié)果表明,1ml定量環(huán)容易造成總烴出現(xiàn)平頭峰,改成0.25ml定量環(huán)能得到好的峰形;非甲烷總烴的檢出限為0.04 mg/m~3(以碳計);氧峰值與氧量具有線性關(guān)系,應(yīng)根據(jù)氧量判斷氧峰值大小,而不是統(tǒng)一扣除除烴空氣氧峰值;廢氣中存在高沸點組分時,容易吸附于采樣容器內(nèi)壁,將樣品加熱100℃再測試可提高該組分的檢出率。

測定固定污染源廢氣中非甲烷總烴 圖片：



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