HH-THC-30 2021總烴毛細(xì)管柱應(yīng)用

。實(shí)驗(yàn)結(jié)果表明,標(biāo)準(zhǔn)氣中CH4和C3H8遵從碳數(shù)響應(yīng)規(guī)律,其配比不會(huì)影響定量的準(zhǔn)確性,可根據(jù)樣品總烴和甲烷比例適當(dāng)配制;對(duì)于低濃度樣品,以空氣為底氣的總烴響應(yīng)靈敏度低于氮?dú)鉃榈讱獾目偀N響應(yīng)靈敏度,采用以氮?dú)鉃榈讱獾臉?biāo)準(zhǔn)氣來(lái)定量空氣中總烴的含量時(shí),測(cè)定結(jié)果將產(chǎn)生較大偏差,甚可能產(chǎn)生負(fù)值,應(yīng)該用以除烴空氣為底氣的標(biāo)準(zhǔn)氣來(lái)定量空氣樣品;某些樣品測(cè)定過(guò)程中,總烴不只出一個(gè)峰,需要調(diào)節(jié)相關(guān)條件再進(jìn)行測(cè)定。


2021總烴毛細(xì)管柱應(yīng)用 測(cè)試譜圖：





2021 Total Hydrocarbon Capillary Column Application
2021 Total Hydrocarbon Capillary Column Application Details:

Stationary phase: deactivated capillary column

Specification: 30m/0.53mm

Model: HH-THC
Application: Determination of ambient air/stationary pollution source exhaust gas, methane, total hydrocarbons, non-methane total hydrocarbons



Haohan Chromatography (Shandong) Applied Technology Development Co., Ltd. uses direct injection differential gas chromatography to determine the amount of non-methane total hydrocarbons (NMHC). The experiment researched the influence of analysis conditions, gas source and quantitative method on the quantitative accuracy of NMHC. Considering the lower baseline response and higher sensitivity, choosing appropriate hydrogen and air flow rates, the detection limit of the NMHC method is 0.03 mg/m3 (calculated as carbon), which can ensure the accuracy of low-concentration samples analysis. The experimental results show that CH4 and C3H8 in the standard gas follow the carbon number response law, and their ratio will not affect the accuracy of quantification, and can be appropriately prepared according to the ratio of total hydrocarbon and methane in the sample; for low-concentration samples, the total hydrocarbon with air as the bottom gas The response sensitivity is lower than the response sensitivity of total hydrocarbons with nitrogen as the bottom gas. When the standard gas with nitrogen as the bottom gas is used to quantify the content of total hydrocarbons in the air, the measurement results will have a large deviation, and may even produce negative values. It should be used to remove hydrocarbons. Air is the standard gas of the bottom gas to quantify air samples; during the determination of some samples, the total hydrocarbon does not only show a peak, and the relevant conditions need to be adjusted before the determination.


2021 total hydrocarbon capillary column application test spectrum: