石油产品中间馏分芳烃含量分析方法

Analysis method of aromatic hydrocarbon content in middle distillates of petroleum products

对目前常见的石油产品中间馏分芳烃含量测定标准分析方法、荧光指示剂吸附法(FIA法)、气相色谱—质谱联用法(GC-MS)和高效液相色谱法(HPLC)做了分析与讨论。荧光指示剂法准确度与重复性均不高,只能得到<315℃馏分中芳烃总量,GC-MS和高效液相色谱法分析中间馏分芳烃,准确度,精密度都较高,给出的信息也多,但仪器价格昂贵,分析成本高。文中介绍了以紫外分光光度法分析石油产品中芳烃及芳烃衍生物的几种方法。紫外分光光度法分析石油各类产品,步骤简单,时间短,准确度较高,在排除干扰物质后,可以作为石油产品芳烃含量的日常监测手段。

The standard analysis methods,fluorescence indicator adsorption method(FIA method),gas chromatography-mass spectrometry(GC-MS)and high performance liquid chromatography(HPLC)for the determination of aromatic hydrocarbons in middle distillates of petroleum products were analyzed and discussed.The accuracy and repeatability of fluorescence indicator method were not high,and only obtainedthe total aromatics in the<315℃fraction.GC-MS and high performance liquid chromatography can analyze the middle fraction aromatics with higher accuracy and precision,and provide more information with expensiveinstrument and the highanalysis cost.This paper introduced several methods for the analysis of aromatics and aromatics derivatives in petroleum products by ultraviolet spectrophotometry.Ultraviolet spectrophotometry was of simple step,short time and high accuracy method for the analysis of various petroleum products.It can be used as a daily monitoring method for the aromatic content of petroleum products after the removal of interfering substances.