名稱(chēng)：甲烷毛細(xì)管柱

編號(hào)：20220719007

規(guī)格：30m*0.53mm*25um

型號(hào)：HH-PLOT Molecular sieve

使用溫度：250°C

應(yīng)用：HJ-2017環(huán)境空氣/固定污染源廢氣中總烴，甲烷，非甲烷總烴的測(cè)定 氣相色譜法

總烴，指所有的碳?xì)浠衔锛捌溲苌?，?duì)環(huán)境空氣造成污染的主要是常溫下為氣態(tài)及液態(tài)但具有較大揮發(fā)性的部分。非甲烷總烴通常是指除甲烷以外的所有可揮發(fā)的碳?xì)浠衔锛捌溲苌?其中主要是c2?c8)。在實(shí)驗(yàn)條件下，用氫火焰離子化檢測(cè)器(fid)所測(cè)得的氣態(tài)碳?xì)浠衔锛捌潆s原子取代化合物的總量，減去甲烷部分的含量，即為非甲烷總烴。非甲烷總烴濃度高，一般說(shuō)明空氣或者廢氣中有機(jī)污染物含量高，除直接對(duì)人體健康有害外，在一定條件下大氣中的烴類(lèi)與氮氧化物經(jīng)日光照射產(chǎn)生一系列光化學(xué)反應(yīng)而形成光化學(xué)煙霧，對(duì)環(huán)境和人類(lèi)都造成進(jìn)一步危害。因此大氣污染物綜合排放標(biāo)準(zhǔn)中明確規(guī)定了非甲烷總烴的高允許排放濃度、高允許排放速率和無(wú)組織排放限值。
非甲烷總烴測(cè)定的公認(rèn)方法是分別測(cè)定總烴和甲烷含量，然后兩者相減得到非甲烷總烴含量。對(duì)于總烴測(cè)定，通常將樣品氣以固定流速連續(xù)流入fid檢測(cè)器，或利用載氣(零氣)將固定體積的樣品氣帶入fid檢測(cè)器，這是總烴測(cè)定的標(biāo)準(zhǔn)方法。

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: