分光光度法测定沥青质含量

Determination of the Asphaltine Content in Crude Oil by Spectrophotometric Method

用重量分析法分离得到的沥青质和正庚烷可溶物复配已知沥青质含量的复配油作试样，考察了影响双波长分光光度法测沥青质含量的各种因素，表明目前仪器条件下难以达到测量之目的．但实验中发现单波长分光光度法测定的复配油样吸光度与其沥青质含量间有良好的线性关系，提出以此线性关系为基础的沥青质含量测定方法值得进一步讨论．

Some factors affect the determination of asphaltine content in crude oil by dual wavelength spectrophotometric method.These factors are analysed by means of a mixed oil of the asphaltine separated by gravimetric analysis method with a component soluble in heptane.It is shown that with present dual wavelength spectrophotometers,the determination is not successful.In our experiments,it is found that there is a good linear relationship between the light absorption of the mixed oil determined by single wavelength spectrophotometric method and the asphaltine content.The spectrophotometric method for the determination of asphaltine content based on the relationship is discussed.