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加压-闪蒸仪气相色谱法测定液化石油气中二甲醚含量

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

press-flash analyzergas chromatographydimethyl etherliquefied petroleum gas

程化鹏、邵青松、高文龙、陈泉、伍昌维

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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

加压-闪蒸仪 气相色谱 二甲醚 液化石油气

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
年,卷(期)：2024.53(15)