GDX502 自动进样气相色谱法测气体中非甲烷总烃

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

非甲烷总烃的测定是利用气相色谱仪-火焰离子化检测器(FID)进行分析，以甲烷、丙烷的混合标气进行定性定量计算。FID的工作原理基于等碳响应原理，即化合物中的碳被电离几率(I/106)是相同的。而在实际测定过程中，烃类化合物被电离的几率会受到氢气和空气比例、自身官能团性强弱等因素影响。相同质量浓度的烃类化合物响应值偏差很大，造成测定数据与真实结果的偏离。此外，在试验中，多采用针筒或气袋采集样品、手工进样的方式测试非甲烷总烃。该操作过程较频繁、耗时长，且人为造成的误差也较大。

滕州市浩瀚色谱仪器技术服务有限公司， 以气袋采样,气体自动进样器进样,双柱双氢焰离子化检测器气相色谱法分析气体样品中非甲烷烃.此方法与传统手动进样法相比,具有重复性好、效率高、操作简单、不易熄火等,且可适用于其他挥发性有机物,如苯系物等的测定.

自动进样气相色谱法测气体中非甲烷总烃 图片：



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