浩瀚色谱环境空气非甲烷总烃在线监测甲烷柱GDX-502

近年来，随着经济社会的发展，大气污染问题日益明显。作为大气污染问题首要的来源之一，化学大气环境的污染排放也愈发受到政府和人们的关注。随着大气污染监测工作的逐步开展和重视，国内各省市都建成了密集分布的环境大气分析实验室和大气自动监测站，对挥发性有机化合物(VOCs)进行监测。非甲烷总烃(NMHC)是一类挥发性有机化合物，根据《大气污染物综合排放标准详解》，非甲烷总烃是指除甲烷以外所有碳氢化合物的总称，主要包括烷烃、烯烃、芳香烃和含氧烃等组分。由于大气有机污染物组成复杂，各地污染情况不同，难以用某几种有机物全面反映污染情况，因此在实际环境空气监测中，常将非甲烷总烃作为一项重要的综合性评价因子。《大气污染物综合排放标准》(GB16297-1996)对其无组织排放监测浓度进行了规定。目前，世界主流非甲烷总烃测定技术为气相色谱-氢火焰离子化检测器GC-FID法。

浩瀚色谱（山东）应用技术开发有限公司研发一种环境空气非甲烷总烃在线监测仪器优化与校准方法，涉及大气环境监测技术领域。通过采用对气相色谱定量环及总烃色谱柱进行惰性化处理及调节FID检测器喷嘴孔径和柱箱温度、进样口温度、载气流速、FID检测器温度等参数对非甲烷总烃在线监测仪器进行优化；利用甲苯、乙酸乙酯、三氯乙烯标准气体和甲烷丙烷混合标准气体检验仪器是否满足多组分测定示值误差；进行多点校准，并使校准曲线满足对相关系数、残差与校准浓度比值的要求。提高了各型非甲烷总在线监测仪器数据的一致性、准确性，规范了环境空气非甲烷总烃在线监测技术，可提高数据质量，满足空气污染监测、评估和管理需求。

甲烷柱

固定相：高聚物
规格2m*3mm，2m*4mm，2m*1/8
粒度：60-80目
型号：GDX-104，GDX-502

 

应用：HJ 604-2017 环境空气 总烃、甲烷和非甲烷总烃的测定 直接进样-气相色谱法

 
In recent years, with the development of economy and society, the problem of air pollution has become increasingly obvious. As one of the primary sources of air pollution, pollution emissions from the chemical atmosphere have also attracted more and more attention from the government and people. With the gradual development and emphasis on air pollution monitoring, all provinces and cities in China have built densely distributed environmental atmospheric analysis laboratories and automatic atmospheric monitoring stations to monitor volatile organic compounds (VOCs). Non-methane total hydrocarbons (NMHC) is a type of volatile organic compounds. According to the "Detailed Explanation of Comprehensive Air Pollutant Emission Standards", non-methane total hydrocarbons refer to all hydrocarbons except methane, mainly including alkanes, alkenes, and aromatic hydrocarbons. And oxygenated hydrocarbons and other components. Due to the complex composition of atmospheric organic pollutants and the different pollution situations in different regions, it is difficult to use certain organic substances to fully reflect the pollution situation. Therefore, in actual ambient air monitoring, non-methane total hydrocarbons are often used as an important comprehensive evaluation factor. The "Comprehensive Emission Standard of Air Pollutants" (GB16297-1996) stipulates the monitoring concentration of unorganized emissions. At present, the world's mainstream non-methane total hydrocarbon determination technology is gas chromatography-hydrogen flame ionization detector GC-FID method.

Haohan Chromatography (Shandong) Applied Technology Development Co., Ltd. has developed an online monitoring instrument optimization and calibration method for ambient air non-methane total hydrocarbons, which involves the technical field of atmospheric environmental monitoring. Online monitoring of non-methane total hydrocarbons by adopting the inertization treatment of the gas chromatographic quantitative loop and the total hydrocarbon chromatographic column, and adjusting the FID detector nozzle aperture and oven temperature, injection port temperature, carrier gas flow rate, FID detector temperature and other parameters The instrument is optimized; the standard gas of toluene, ethyl acetate, trichloroethylene and the mixed standard gas of methane and propane is used to check whether the instrument meets the indication error of multi-component measurement; multi-point calibration is performed, and the calibration curve meets the correlation coefficient and residual error The ratio of the calibration concentration is required. Improve the consistency and accuracy of the data of various types of non-methane total online monitoring instruments, and standardize the online monitoring technology of ambient air non-methane total hydrocarbons, which can improve data quality and meet the needs of air pollution monitoring, evaluation and management.

Methane column
Stationary phase: polymer
Specification 2m*3mm, 2m*4mm, 2m*1/8
Granularity: 60-80 mesh
Model: GDX-104, GDX-502

Application: HJ 604-2017 Ambient air Determination of total hydrocarbons, methane and non-methane total hydrocarbons Direct injection-gas chromatography