浩瀚色谱（山东）应用技术开发有限公司，以HJ/T 38-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。


浩瀚色谱研发的HH-THC-30-II二型总烃毛细管柱取代了原来的HH-THC-30一型总烃毛细管柱；二型柱柱效高，弹性好，不易折断，是浩瀚色谱的产品。

测定固定污染源废气中总烃  测试谱图：



Determination of total hydrocarbons in waste gas from stationary sources
Determination of total hydrocarbons in exhaust gas from stationary sources Details:

Name: Capillary Total Hydrocarbon Column
Specification: 30m*0.32mm
Model: HH-THC-30-II
application:
HJ 604-2017 Determination of Ambient Air Total Hydrocarbons, Methane and Non-Methane Total Hydrocarbons Direct Sampling-Gas Chromatography
HJ 38-2017 Determination of Total Hydrocarbons, Methane and Non-Methane Total Hydrocarbons in Waste Gas from Stationary Pollution Sources Gas Chromatography


Haohan Chromatography (Shandong) Applied Technology Development Co., Ltd., based on HJ/T 38-, discussed many problems in the determination of non-methane total hydrocarbons in exhaust gas from pollution sources by gas chromatography. Research and experiments have been done in the areas of determination and interference of high-boiling substances. The results show that 1ml quantitative loop is easy to cause flat peaks of total hydrocarbons, and changing to 0.25ml quantitative loop can get a good peak shape; the detection limit of non-methane total hydrocarbons is 0.04 mg/m~3 (calculated by carbon); oxygen peak It has a linear relationship with the oxygen content. The oxygen peak value should be judged based on the oxygen content, rather than uniformly deducting the peak oxygen peak of the air except for hydrocarbons; when there are high boiling point components in the exhaust gas, it is easy to adsorb on the inner wall of the sampling container, and the sample is heated to 100°C before testing The detection rate of this component can be improved.


The HH-THC-30-II type II total hydrocarbon capillary column developed by Haohan Chromatography replaces the original HH-THC-30 type I total hydrocarbon capillary column; the second type column has high efficiency, good elasticity, and is not easy to break, which is unique in Haohan Chromatography. The product.

Determination of total hydrocarbons in exhaust gas from stationary sources Test spectrum: