紫外分光光度法测定200～260℃加氢精制无味煤油中芳烃含量  

Determination of Aromatics Content of Hrdro-refining 200-260 ℃ Keroseneby Ultraviolet Spectrophotometer

作　　者：杨少锋[1] 杨冰[2] 

机构地区：[1]中国石化集团洛阳石化工程公司,河南洛阳471003 [2]郑州大学化学系,郑州450001

出　　处：《河南师范大学学报（自然科学版）》2010年第5期115-117,121,共4页Journal of Henan Normal University(Natural Science Edition)

摘　　要：用一待测200～260℃加氢精制无味煤油试样,利用硅胶吸附、甲醇顶替脱附的办法制取其中的混合芳烃.以异辛烷作为稀释溶剂,求出该混合芳烃在272 nm处的平均吸光系数,然后利用此吸光系数测定与其属同一批原料所生产的其它无味煤油中芳烃含量.在波长272 nm处,本方法的检测下线可达0.57 ug/g,灵敏度指数0.45μg.cm^-2,回收率为94%～101%.The mixture aromatics can be prepared from the undetermined sample-the hydro-refining scentless kerosene with the distilling range of 200-260 ℃ by using silicon gum adsorption and methyl alcohol replacing dis-adsorption.Using the iso-octane as the diluent solvent,the average absorbency coefficient of the mixture aromatics at 272 nm can be worked out.Then the mixture aromatics content in the other kerosene which made of the same materials through using the same absorbency coefficient is determined.This method can test the lowest limit as 0.57 ug/g at 272 nm.The sensitivity is 0.45 μg·cm^-2,and the recycling rate is 94%-101%.

关 键 词：紫外分光光度法 无味煤油 芳烃 硅胶 异辛烷 甲醇 

分 类 号：O657.32[理学—分析化学]