基于气相色谱法测定气体中甲烷、一氧化碳、乙烷、丙烷、正丁烷含量  

Determination of methane,carbon monoxide,ethane,propane,n-butane content in gases based on gas chromatography

作　　者：刘亚新 郭建宏 王露 LIU Ya-xin;GUO Jian-hong;WANG Lu(Inspection workshop of Chemical Production Department of Urumqi Petrochemical Company of CNPC Urumqi,Urumqi 830019,China)

机构地区：[1]中国石油乌鲁木齐石化分公司化工生产部检验车间,新疆乌鲁木齐830019

出　　处：《聚酯工业》2023年第4期20-23,共4页Polyester Industry

摘　　要：本文通过气相色谱法测定气相中甲烷、一氧化碳、乙烷、丙烷、正丁烷的含量。采用两根气相色谱填充柱和1根分子筛13 m×2 m×1/8柱,以外标法进行定量,CO、CO_(2)、C1~C4正构烃检出限均为1×10^(-6),灵敏度为0.003 ng/s,方法的相对标准偏差为0.89%~2.13%,加标平均回收率达95%~106.14%。实验方法具有精密度较好,样品损失率小,样品处理简单等优点,可以满足实际检测需求。This article uses gas chromatography to determine the content of methane,carbon monoxide,ethane,propane,and n-butane in the gas phase.Using two gas chromatography packed columns and one molecular sieve 13 m×2 m×1/8 column,external standard method for quantification,detection limits of CO,CO_(2),C1~C4 normal hydrocarbons are all 1×10^(-6),sensitivity is 0.003 ng/s.The relative standard deviation of the method is 0.89%~2.13%,and the average recovery rate of the added standard is 95%~106.14%.The experimental method has the advantages of good precision,low sample loss rate,and simple sample processing,which can meet practical detection needs.

关 键 词：气相色谱法 气体检测 易燃易爆气体 

分 类 号：O657.7[理学—分析化学]