分析测试学报2017，Vol.36Issue(9)：1119-1123,5.DOI:10.3969/j.issn.1004-4957.2017.09.011
气相色谱法测定大气中的CO、CO2以及低级烃类物质
Determination of CO, CO2 and Light Hydrocarbons in Air by Gas Chromatography
摘要
Abstract
A method was developed for the simultaneous determination of carbon monoxide,carbon dioxide and three light hydrocarbons i.e.methane,ethylene and acetylene in air by gas chromatography.The GC system consisted of auto-injection,one ten-port valve together with a six-port valve and one ten-port valve in series with a four-port valve.Sample injection,column isolation and column back-flushing were realized in this way mentioned.An HP-PLOT Q open tubular capillary column was employed for the separation of the five gases followed by thermal conductivity detection.After the separation was completed,carbon monoxide and carbon dioxide were converted into methane with the use of a nickel-based methanizer for the detection by flame ionization.Separation of all the target analytes was achieved in one single analysis within 9 min.Carbon monoxide,methane,carbon dioxide,ethylene and acetylene were found to be linear over the ranges of 3.3-4 990.0,3.3-5 010.0,6.6-4 990.0,4.2-5 080.0,3.9-5 030.0 μmol/mol,respectively.The correlation coefficients were not less than 0.997 with the detection limits of 1.0-2.0 μmol/mol.Reproducibility of two levels,namely std1 and std2 were found to be not more than 3.5％ (n =5).This method was simple,accurate and maneuverable.关键词
温室气体/开口毛细管柱/气相色谱/大气/乙烯/乙炔Key words
greenhouse gas/open tubular capillary columns/gas chromatography/air/ethylene/acetylene分类
化学化工引用本文复制引用
张丽萍,王久荣,陈闻,耿梅梅,袁红朝,李春勇,彭灿,许丽卫..气相色谱法测定大气中的CO、CO2以及低级烃类物质[J].分析测试学报,2017,36(9):1119-1123,5.基金项目
中国科学院仪器功能开发项目(2015gw05) （2015gw05）
