毛细管气相色谱法分析液化石油气中二甲醚  

ANALYSIS OF DIMETHYL ETHER IN LIQUEFIED PETROLEUM GASES BY CAPILLARY GAS CHROMATOGRAPHY

作　　者：李东刚[1] 王文佳[1] 吴凡[1] 杨光[1] 鞠福龙[1] 李春娟[1] 

机构地区：[1]黑龙江省质量监督检测研究院,哈尔滨150050

出　　处：《化学分析计量》2011年第3期33-35,共3页Chemical Analysis And Meterage

基　　金：黑龙江省2010年地方标准项目(25)

摘　　要：建立了液化石油气中二甲醚的毛细管气相色谱分析方法。利用丙酮作为溶剂吸收液化石油气中二甲醚，采用HP-1毛细管色谱柱进行分离，以氢火焰离子化检测器检测，外标法进行定量分析。二甲醚的体积分数在o．5％～30．0％范围内与色谱峰面积呈良好线性关系，二甲醚的定量下限为o．2％，测定结果的相对标准偏差为2．3％-一7．3％（n=6）。以液化石油气标准气考察方法的准确度，不同实验室对方法进行了比对验证，结果表明该方法准确、可靠、易于操作。A method for the determination of dimethyl ether in liquefied petroleum gases（LPG） was established by capillary gas chromatography. Dimethyl ether in LPG was absorbed by acetone. After being separated by HP - 1 column, the content of dimethyl ether in LPG was determined by hydrogen flame ionization detector （FID） and external standard method. The linearity range was 0.5% - 30% （volume ratio）. The limit of quantification was 0.2% （volume ratio）. The RSD was 2.3% -7.3% （n =6）. The accuracy was investigated using liquefied petroleum gases standard sample which contained dimethy ether, and the validation results of three different laboratories showed that this method is accurate, reliable and easy.

关 键 词：液化石油气 二甲醚 气相色谱法 外标法 液体进样 

分 类 号：O657.71[理学—分析化学]