GDX-502 气相色谱法测定非甲烷总烃的研究

滕州市浩瀚色谱仪器技术服务有限公司，用玻璃注射器(气袋)采集气体样品,以双柱单氢火焰离子化检测器的气相色谱仪直接进行测定.进样1.0mL样品分别进入汽化室的总烃柱和甲烷柱中,由于这两个柱子填充材料和长短差异,总烃先在FID上产生响应,然后甲烷在FID上产生响应.总烃的浓度扣除甲烷浓度和除烃空气氧的浓度值,即可得到非甲烷总烃(NMHC)的浓度,可以实现单次进样,同时完成总烃、甲烷、非甲烷总烃浓度的测定.文章研究1.37～22.3 mg/m3浓度甲烷标准气,得出甲烷标准曲线方程为Y =715X +829,r=0.9990,相对标准偏差为0.26％～1.8％,总烃标准曲线方程Y=695X+ 724,相对标准偏差为0.35％ ～ 1.4％,除烃空气(O2-N2,20.8％)相对标准偏差为0.75％.该法用于环境空气和固定污染源有组织排放中NMHC含量分析,操作简单,实验结果满意.

提供完整的分析方案
解决O2的干扰，负值的问题，

气相色谱法测定非甲烷总烃的研究 图片：

GDX-104/502，硅烷化玻璃微球填充柱
30m*0.53mm毛细管柱

Determination of Non-methane Total Hydrocarbons by Gas Chromatography
Determination of non-methane total hydrocarbons by gas chromatography

Tengzhou Haohao Chromatography Instrument Technology Service Co., Ltd. collects gas samples with glass syringes (air bags) and directly measures them with a gas chromatograph of a two-column single hydrogen flame ionization detector. The total volume of 1.0 mL samples entering the vaporization chamber In the hydrocarbon column and the methane column, due to the difference in the material and length of the two columns, the total hydrocarbon first responds on the FID, and then the methane responds on the FID. The total hydrocarbon concentration minus the methane concentration and the concentration of the dehydrogenated air oxygen The concentration of non-methane total hydrocarbons (NMHC) can be obtained, and a single injection can be achieved, and the total hydrocarbon, methane, and non-methane total hydrocarbon concentration can be determined. The article studies 1.37-22.3 mg/m3 concentration of methane standard gas. The methane standard curve equation is Y = 715X + 829, r = 0.9990, the relative standard deviation is 0.26% to 1.8%, the total hydrocarbon standard curve equation Y = 695X + 724, the relative standard deviation is 0.35% ~ 1.4%, except for hydrocarbon air ( O2-N2, 20.8%) The relative standard deviation is 0.75%. This method is applied to the analysis of NMHC content in organized emissions of ambient air and fixed pollution sources. The operation is simple and the experimental results are satisfactory.

Provide a complete analysis solution
Solve the interference of O2, the problem of negative value, the choice of column, and develop a unique analytical method

Determination of Non-methane Total Hydrocarbons by Gas Chromatography

GDX-104/502, silanized glass microsphere packed column
30m*0.53mm capillary column