气相色谱法检测醚化轻汽油中烃类的组成

Determination of hydrocarbon composition in etherified light gasoline by gas chromatography

采用HP-PONA柱(100m×250μm×0.5μm),柱流速1.75mL/min,载气氦气,程序升温,使用文献质量校正因子,校正归一化法定量,醚化汽油中甲醇(ME)、甲基丁烯、甲基戊烯、甲基叔丁基醚(MTBE)、甲基叔戊基醚(TAME)、碳七醚类等组分可以分离。标样各组分回收率在90%~110%之间,样品中上述组分测定值的相对标准偏差均<6%,1次测定色谱运行时间<35 min。

In the test,HP-PONA column(100m×250μm×0.5μm)was used,the column flow velocity was 1.75ml/min,the carrying gas was helium,the temperature was programmed,the components of ME,methyl butene,methyl pentene,MTBE,TAME and heptathers in etherified gasoline could be separated by calibration normalization method using literature quality correction factor.The recoveries of each component of the standard samples were between 90%and 110%,the relative standard deviations of the determination values of the above components in the sample were less than 6%,and the chromatographic running time of one-time determination was less than 35min.