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

非甲烷總烴的測(cè)定是利用氣相色譜儀-火焰離子化檢測(cè)器(FID)進(jìn)行分析，以甲烷、丙烷的混合標(biāo)氣進(jìn)行定性定量計(jì)算。FID的工作原理基于等碳響應(yīng)原理，即化合物中的碳被電離幾率(I/106)是相同的。而在實(shí)際測(cè)定過(guò)程中，烴類化合物被電離的幾率會(huì)受到氫氣和空氣比例、自身官能團(tuán)性強(qiáng)弱等因素影響。相同質(zhì)量濃度的烴類化合物響應(yīng)值偏差很大，造成測(cè)定數(shù)據(jù)與真實(shí)結(jié)果的偏離。此外，在試驗(yàn)中，多采用針筒或氣袋采集樣品、手工進(jìn)樣的方式測(cè)試非甲烷總烴。該操作過(guò)程較頻繁、耗時(shí)長(zhǎng)，且人為造成的誤差也較大。

滕州市浩瀚色譜儀器技術(shù)服務(wù)有限公司， 以氣袋采樣,氣體自動(dòng)進(jìn)樣器進(jìn)樣,雙柱雙氫焰離子化檢測(cè)器氣相色譜法分析氣體樣品中非甲烷烴.此方法與傳統(tǒng)手動(dòng)進(jìn)樣法相比,具有重復(fù)性好、效率高、操作簡(jiǎn)單、不易熄火等,且可適用于其他揮發(fā)性有機(jī)物,如苯系物等的測(cè)定.

自動(dòng)進(jìn)樣氣相色譜法測(cè)氣體中非甲烷總烴 圖片：



Determination of non-methane total hydrocarbons in gases by auto-injection gas chromatography
Automated Gas Chromatography for Determination of Non-Methane Total Hydrocarbons in 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

The determination of non-methane total hydrocarbons was carried out by gas chromatography-flame ionization detector (FID), and qualitative and quantitative calculations were carried out using a mixed gas of methane and propane. The working principle of FID is based on the principle of equal carbon response, ie the probability of carbon ionization (I/106) in a compound is the same. In the actual measurement process, the probability of the hydrocarbon compound being ionized will be affected by factors such as the ratio of hydrogen to air and the polarity of the self-functional group. Hydrocarbon compounds of the same mass concentration have large deviations in response values, causing deviations between the measured data and the actual results. In addition, in the test, the sample was collected by syringe or air bag, and the non-methane total hydrocarbon was tested by manual injection. This operation process is frequent, time consuming, and human error is also large.

Tengzhou Haohao Chromatography Instrument Technology Service Co., Ltd., using gas bag sampling, gas autosampler injection, two-column dual hydrogen flame ionization detector gas chromatography to analyze non-methane hydrocarbons in gas samples. This method and traditional manual injection Compared with the method, it has the advantages of good repeatability, high efficiency, simple operation, and low flameout, and can be applied to the determination of other volatile organic compounds, such as benzene series.

Determination of non-methane total hydrocarbons in gases by auto-injection gas chromatography