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自动进样气相色谱法测定气体中的非甲烷烃
引用本文:庞卫锋,李.自动进样气相色谱法测定气体中的非甲烷烃[J].化工环保,2008,28(1):89-92.
作者姓名:庞卫锋  
作者单位:上海市闵行区环境监测一站,上海,201100
摘    要:用泰德拉气体采样袋采样,自动进样气相色谱法测定气体中的非甲烷烃含量。甲烷、总烃的线性范围分别为0~2439,0—2066mg/m^3。进样量为1mL时,检出限为0.02mg/m^3(信噪比为3)。对3种不同浓度甲烷与丙烷混合标准气进行测定,重复性相对标准偏差为0.4%-1.0%。对4种不同性质的试样进行加标回收实验,加标回收率为96.7%-102.0%。5名实验人员分别用自动进样法及手动进样法分析4种不同性质的试样,自动进样法的重现性相对标准偏差为1.2%~1.8%,优于手动进样法的6.5%~8.3%。该法可一次连续测定21个试样,精密度高、重现性好、分析效率高。

关 键 词:气体自动进样器  非甲烷烃  气相色谱法  分析方法

Determination of Non-methane Hydrocarbons in Gas by Gas Chromatography with Gas Autosampler
Pang Weifeng,Li Cheng,Huang Hai.Determination of Non-methane Hydrocarbons in Gas by Gas Chromatography with Gas Autosampler[J].Environmental Protection of Chemical Industry,2008,28(1):89-92.
Authors:Pang Weifeng  Li Cheng  Huang Hai
Abstract:Non-methane hydrocarbons in gas was collected by Tedlar gas collecting bags and determined by gas chromatography with gas autosampler.The linear range for mass concentration of methane and total hydrocarbons is 0-2 439 mg/m~3 and 0-2 066 mg/m~3 respectively.When the sample volume is 1 mL,the detection limit of the method is 0.02 mg/m~3(with the signal-noise ratio of 3).For the determination of 3 kinds of methane and propane standard gas mixtures with different concentration,the repeatability RSD is 0.4%-1.0...
Keywords:gas autosampler  non-methane hydrocarbon  gas chromatography  analytic method  
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