加压-闪蒸仪气相色谱法测定液化石油气中二甲醚含量

Determination of Dimethyl Ether in Liquefied Petroleum Gas by Gas Chromatography with Press-flash Analyzer

程化鹏 ¹邵青松 ¹高文龙 ¹陈泉 ¹伍昌维¹

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作者信息

1. 贵州省产品质量检验检测院,贵州贵阳 550016;贵州省气体产品检验检测中心,贵州贵阳 550016
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摘要

目的:建立加压-闪蒸仪气相色谱法测定液化石油气中二甲醚含量的方法.方法:对取样后的钢瓶进行加压,通过闪蒸仪进行汽化,外标法定量.结果:二甲醚在0.771％～99.898％范围内线性良好,相关系数0.999 50,方法检出限0.05％,方法相对标准偏差为0.36％～2.91％,加标回收率为94.1％～104.3％.结论:本方法满足液化石油气中二甲醚含量在0.771％～99.898％的测定,且方法简便,线性、精密度和准确度良好.

Abstract

Objective:A method for determination of dimethyl ether in liquefied petroleum gas(LPG)by gas chromatography with pressure-flash analyzer was established.Methods:The sampled cylinders were pressurized and vaporized by flash evaporator,and quantified by external standard method.Results:The linear range of DME was 0.771％～99.898％,the correlation coefficient was 0.999 50,the detection limit of the method was 0.05％,the relative standard deviation of the method was 0.36％～2.91％,and the recoveries were 94.1％～104.3％.Conclusion:The method is suitable for the determination of DME in liquefied petroleum gas in the range of 0.771％～99.898％.The method is simple,linear,precise and accurate.

关键词

加压-闪蒸仪/气相色谱/二甲醚/液化石油气

Key words

press-flash analyzer/gas chromatography/dimethyl ether/liquefied petroleum gas

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出版年

2024

山东化工

山东省化工研究院山东省化工信息中心

山东化工

影响因子：0.249

ISSN：1008-021X

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