HH-PLOT Molecular sieve甲烷毛細(xì)管柱 定量分析非甲烷總烴的毛細(xì)管柱

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定量分析非甲烷總烴的毛細(xì)管柱  測(cè)試譜圖：


Capillary column for quantitative analysis of non-methane total hydrocarbons
Capillary column for quantitative analysis of total non-methane hydrocarbons Details:

Name: Methane capillary column

Number: 20220719007

Specifications: 30m*0.53mm*25um

Model: HH-PLOT Molecular sieve

Operating temperature: 250°C

Application: HJ-2017 Determination of total hydrocarbons, methane, and non-methane total hydrocarbons in ambient air/stationary pollution source waste gas by gas chromatography

Total hydrocarbons refer to all hydrocarbons and their derivatives. The main pollutants to ambient air are the gaseous and liquid but highly volatile parts at room temperature. Non-methane total hydrocarbons generally refer to all volatile hydrocarbons and their derivatives (mainly c2-c8) except methane. Under the experimental conditions, the total amount of gaseous hydrocarbons and their heteroatom-substituted compounds measured by a hydrogen flame ionization detector (fid), minus the content of the methane part, is the total non-methane hydrocarbons. The high concentration of non-methane total hydrocarbons generally means that the content of organic pollutants in the air or exhaust gas is high. In addition to being directly harmful to human health, under certain conditions, hydrocarbons and nitrogen oxides in the atmosphere are formed by a series of photochemical reactions through sunlight irradiation. Photochemical smog further harms the environment and humans. Therefore, the comprehensive emission standard of air pollutants clearly stipulates the maximum allowable emission concentration, maximum allowable emission rate and fugitive emission limit of non-methane total hydrocarbons.
The accepted method for the determination of total non-methane hydrocarbons is to measure the total hydrocarbons and methane content separately, and then subtract the two to obtain the total non-methane hydrocarbon content. For total hydrocarbon determination, the sample gas is usually continuously flowed into the fid detector at a fixed flow rate, or a fixed volume of sample gas is brought into the fid detector using a carrier gas (zero gas), which is the standard method for total hydrocarbon determination.

Capillary column test spectrum for quantitative analysis of non-methane total hydrocarbons: