影响分光光度法测定沥青质含量因素考察  

The Factors of Influencing the Determination of Asphaltine Content by Spectrophotometric Method

作　　者：王玉琨[1,2,3] 荣耀森[1,2,3] 岳廷盛 

机构地区：[1]西安石油学院 [2]辽河油田锦州采油厂 [3]兰州大学

出　　处：《西安石油学院学报》1998年第6期19-21,共3页Journal of Xi'an Petroleum Institute

摘　　要：详细考察了溶剂、测量波长、样品浓度等影响分光光度法测定沥青质含量的重要因素．发现以正庚烷为溶剂，沥青质含量与溶液吸光度有良好线性关系，但对以甲苯为溶剂则同一波长吸光度与沥青质含量的线性关系斜率与复配油中沥青质和正庚烷可溶物的比例有关，从溶剂化角度对此现象予以解释，探讨了分光光度法测定的适宜浓度和波长范围，并对沥青质的分散状态进行了讨论．The effects of solvents, wavelength, concentration of solution, etc. on the determination of asphaltine content by spectrophotometric method are examined. It is found that a good linear relationship exists between the light absorption of mixed oil and its asphaltine content when n-heptane is used as solvent. But there is no such linear relationship when toluene is used as solvent. This phenomenon can be explained from the viewpoint of solvation interaction. The proper ranges of the concentration of solutions and wavelength are determined. And the dispersion effect of asphaltine in crude oil and solutions are discussed.

关 键 词：沥青质 分光光度法 测定 原油 

分 类 号：TE622[石油与天然气工程—油气加工工程]