，采用單一進(jìn)樣口六通閥進(jìn)樣,Porapak Q柱和空柱兩根填充柱及一個(gè)FID檢測(cè)器的氣相色譜法測(cè)定無(wú)組織大氣中甲烷、總烴和非甲烷總烴,測(cè)定結(jié)果均符合大氣污染物綜合排放標(biāo)準(zhǔn)中無(wú)組織排放監(jiān)控標(biāo)準(zhǔn)要求。方法低檢出濃度分別為甲烷0.04 mg/m3,總烴0.04 mg/m3,非甲烷總烴0.06 mg/m3,甲醇2 mg/m3,且能保持良好的重復(fù)性,相對(duì)標(biāo)準(zhǔn)偏差均小于2%,滿足檢測(cè)的要求。該方法操作簡(jiǎn)單、靈敏且分離度好,具有較好的重現(xiàn)性和的準(zhǔn)確度。

PQ填充柱在線測(cè)定大氣中非甲烷總烴 圖片：


On-line determination of non-methane total hydrocarbons in the atmosphere by PQ packed column
On-line determination of non-methane total hydrocarbons in the atmosphere by PQ packed column Details:

Stationary phase: polymer pellet

Particle size: 60-80 mesh

Specifications: 0.8m*1/8, 1.5m*1/8
Material: Stainless steel

Model: PQ/Porapak Q

With the development of modern industry, air pollution is also increasing. Methanol is one of the commonly used raw materials in the modern petrochemical industry. In the production process, it is inevitably released into the air. Methanol is a toxic, harmful, flammable and explosive substance. Non-methane total hydrocarbons (NMHC) generally refer to all volatile hydrocarbons other than methane. When the NMHC in the atmosphere exceeds a certain concentration, it directly damages the human health.

Tengzhou Haohao Chromatography Instrument Technology Service Co., Ltd. uses a single inlet six-port valve injection, Porapak Q column and two empty packed columns and a FID detector for gas chromatography to determine methane, total hydrocarbons and unorganized atmosphere. Non-methane total hydrocarbons, the determination results are in line with the requirements of unorganized emission monitoring standards in the comprehensive emission standards for atmospheric pollutants. The minimum detectable concentrations were 0.04 mg/m3 for methane, 0.04 mg/m3 for total hydrocarbons, 0.06 mg/m3 for non-methane, and 2 mg/m3 for methanol, and maintained good repeatability. The relative standard deviations were less than 2%. , to meet the requirements of testing. The method is simple, sensitive and has good resolution, and has good reproducibility and reliable accuracy.

On-line determination of non-methane total hydrocarbons in the atmosphere by PQ packed column