顶空气相色谱法测定柴油中甲缩醛含量

Determination of Methylal in Diesel Oil by Headspace Gas Chromatography

本文建立了测定柴油中微量甲缩醛含量的顶空气相色谱分析方法,柴油样品不经处理直接进顶空气相色谱分析定量,甲缩醛含量在约0.01~1.3%(m/m)浓度范围内线性关系良好,相关系数大于0.999,重复测定的相对标准偏差(RSD)为0.91%,满足色谱的定量分析要求。该方法简单、快速、准确,可用于柴油中微量甲缩醛含量的检测。

A headspace gas chromatographic method for the determination of trace methylal content in diesel fuel was developed.The diesel samples were Quantitatived directly by headspace gas chromatography without other treatment.The results showed good linear relationships with good correlation coefficients(R2=0.999)in the prescribed concentration range(0.01~1.3%(m/m)).and the relative standard deviations(RSD)was 0.91%.This method is simple,rapid and accurate.It can be used for the determination of trace methylal content in diesel fuel.