二维色谱测定石脑油中微量含氧化合物

摘要

文章采用二维气相色谱测定石脑油及乙烯裂解装置原料中微量含氧化物的含量。二维中心切割( heart-cutting)技术样品中的氧化物组份在非极性柱上预分离后，被切割到极性柱上继续分离，氢火焰离子化检测器检测含氧化合物含量。该方法操作简单，分析时间在20 min以内，重复测定结果的相对标准偏差小于1.8%，方法准确可靠。%The two-dimensional gas chromatography was used to measure the trace oxygen containing compounds in naphtha and the raw material of ethylene cracking facility. The Two-dimensional Heart-cutting Technology: the oxide components in the samples were firstly separated on the non-polar column, and cut to the polarity column to separate secondly, hydrogen flame ionization detector to detect the contents of oxygen containing compounds finally. The method was simple in operation and within 20 min in analysis time. The repeatedly determination results of relative standard deviation was less than 1. 8%. The method was accurate and reliable.