2021總烴毛細管柱應用，液化石油氣，二甲醚，甲縮醛，乙縮醛，苯系物，增塑劑，塑化劑，醫(yī)療器械，環(huán)氧乙烷，三甲胺，二甲醚，乙縮醛，乙醇，二叔丁基過氧化物，DTBP，煉廠氣，氨水

2021總烴毛細管柱應用
2021總烴毛細管柱應用 詳細信息：

固定相：脫活毛細管柱

規(guī)格：30m/0.53mm

型號：HH-THC
應用：環(huán)境空氣/固定污染源廢氣，甲烷，總烴，非甲烷總烴測定

浩瀚色譜（山東）應用技術(shù)開發(fā)有限公司用直接進樣差量氣相色譜法測定非甲烷總烴(NMHC)量。實驗研究了分析條件、氣源和定量方式等對NMHC定量準確度的影響。綜合考慮較低基線響應和較高靈敏度等,選擇合適的氫氣和空氣流速,測得NMHC方法檢出限為0.03 mg/m3(以碳計),該法可低濃度樣品分析的準確度。實驗結(jié)果表明,標準氣中CH4和C3H8遵從碳數(shù)響應規(guī)律,其配比不會影響定量的準確性,可根據(jù)樣品總烴和甲烷比例適當配制;對于低濃度樣品,以空氣為底氣的總烴響應靈敏度低于氮氣為底氣的總烴響應靈敏度,采用以氮氣為底氣的標準氣來定量空氣中總烴的含量時,測定結(jié)果將產(chǎn)生較大偏差,甚可能產(chǎn)生負值,應該用以除烴空氣為底氣的標準氣來定量空氣樣品;某些樣品測定過程中,總烴不只出一個峰,需要調(diào)節(jié)相關(guān)條件再進行測定。


2021總烴毛細管柱應用 測試譜圖：





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: