气相色谱法测定汽油中的甲缩醛

摘要

The method for determination of dimethoxymethane in gasoline is established by gas phase chromatography with 1, 2-dimethoxyethane as internal standard,which is determined by hydrogen flame ionization detector and internal standard method after being separated by column TCEP and column DB-624.The results show that there is a good liner relation between 0.1% and 20%,correlation coefficient is 0.9998.The RSD is from 0.59% to 1.78%(n-6).This method proves to be accurate,reliable and easy to operate.%建立了汽油中甲缩醛的气相色谱分析方法,以乙二醇二甲醚为内标物,采用TCEP柱和DB-624色谱柱进行分离,内标法定量.实验结果表明,方法在0.1%~20%范围内呈现良好的线性关系,相关系数为0.9998,相对标准偏差0.59%~1.78%,回收率94%~115%,方法准确、可靠,易于操作.