在气相色谱分析中,某一多组分混合物能否完全分离开,主要取决于色谱柱的效能和选择性,而色谱柱的效能和选择性在很大程度上取决于固定相选择和本身的性能。气液色谱的固定相是由固︾定液和载体构成,就是说在装柱之前必需经过涂膜(一种使固定液涂布在担体上的技术)才能使用。有机担体系列是々一类新型合成有机固定相,其本身直接装柱使用。
名称：甲烷填充柱
填料：高分子小球
规格：2m*3mm，60-80目
型号：GDX-104
应用： 气相色谱法测定环境空气和固定污染源排◥气中非甲烷总烃
非甲烷总烃（ＮＭＨＣ）通常是指除甲烷以外的所有可挥发的ＣＨ化合物（其中主要〒是Ｃ２－Ｃ８）的总烃。大气中的ＮＭＨＣ超过一定的浓度，除直接对人体健康有害外，在一定条件卐下，经日光照射下，还能产生光化学烟雾，对环境和人■类造成危害，因而已成为现代◆工业城市中的一种主要大气污染物。ＮＭＨＣ主要︻来自汽油燃烧、焚烧垃圾、溶剂蒸发和废物提炼等。
对于空气及废㊣ 气中非甲烷总烃的测定方法已有相应的标准，即双柱双氢火焰气相色谱法。但是根据已有的标●准方法，总烃柱中得到的总烃峰中包含氧峰，应由甲烷柱中得到的氧峰和甲烷峰中扣除氧，而氧的扣除是在实验环境中的氧，和实际
监测环境中的氧含量还有一定差别，而且市场上销售的除烃装置很难保证其Ψ除烃效率，故标准方法也∴不能将其视为理想的▓监测方法。本文利用商品合成空气（氧含量为２０．８％），相对校正样品中的氧含量，以扣除氧的干扰↘，从而建立一种测定非甲烷总烃的新型方法。
In gas chromatography analysis, whether a certain multi-component mixture can be completely separated depends mainly on the efficiency and selectivity of the chromatographic column, and the efficiency and selectivity of the chromatographic column largely depend on the choice of the stationary phase and its own performance. The stationary phase of gas-liquid chromatography is composed of a stationary liquid and a carrier, which means that it must be coated (a technique to coat the stationary liquid on the carrier) before loading the column. The organic support series is a new type of synthetic organic stationary phase, which itself is directly loaded into the column.
Name: Methane packed column
Filler: polymer beads
Specification: 2m*3mm, 60-80 mesh
Model: GDX-104
Application: Determination of non-methane total hydrocarbons in ambient air and exhaust from stationary sources by gas chromatography
Non-methane total hydrocarbons (NMHC) usually refers to the total hydrocarbons of all volatile CH compounds (mainly C2-C8) except methane. Exceeding a certain concentration of NMHC in the atmosphere, in addition to being directly harmful to human health, under certain conditions, under sunlight exposure, it can also produce photochemical smog, which is harmful to the environment and humans. Therefore, it has become a kind of modern industrial city. Main air pollutants. NMHC mainly comes from gasoline combustion, garbage incineration, solvent evaporation and waste refining.
There are corresponding standards for the determination of non-methane total hydrocarbons in air and exhaust gas, that is, double-column double-hydrogen flame gas chromatography. However, according to the existing standard method, the total hydrocarbon peak obtained from the total hydrocarbon column contains the oxygen peak. The oxygen peak and methane peak obtained from the methane column should be deducted from the oxygen. The oxygen deduction is the oxygen in the experimental environment. And actual
There is still a certain difference in the oxygen content in the monitoring environment, and it is difficult for the hydrocarbon removal equipment sold on the market to guarantee its hydrocarbon removal efficiency, so the standard method cannot be regarded as an ideal monitoring method. In this paper, commercial synthetic air (oxygen content of 20.8%) is used to relatively calibrate the oxygen content in the sample to deduct the interference of oxygen, thereby establishing a new method for determining non-methane total hydrocarbons.
