石油苯纯度测定方法的研究

The Study on Determination Method of Purity of Petroleum Benzene

测定石油苯纯度常用方法为ASTMD4492气相色谱法分析苯的纯度标准实验方法,文章分别采用内标法、面积归一法对石油苯纯度分析方法做了研究。面积归一法用量少,操作简单,结果精确度低;内标法为准确定量,操作步骤多,需要加入内标物,结果较精确;两种方法均能满足分析重复性;当苯纯度高时,两种方法结果差别小。

The method for the determination of purity of petroleum benzene is the standard test method for the purity analysis of benzene by ASTMD4492 gas chromatography.In this paper,the method of internal standard and area normalization are used to study the purity analysis method of benzene.The method of area normalization is less sample usage,and the operation is simple,but the accuracy is low.The internal standard method is an accurate quantification but with multi-step operation and need to add internal standard substances.Both methods can meet analytical repeatability.When the purity of benzene is high,the results deviation of the two methods is small.