| 摘要 |
PURPOSE:To improve solubility, lighting property, and the like of a sample, by constituting the composition of a petroleum series hydrocarbon solvent for dilluting or dissolving the analysis sample by an aromatic component, a paraffin series component, and a naphthene series component, and designating a boiling point in a specified range. CONSTITUTION:The analysis sample of a petroleum product including a metallic element and the like, its additive, or a coal series hydrocarbon oil, and the like is dilluted or dissolved by using a solvent for the atomic absorption analysis or the emission spectrochemical analysis. The composition of said solvent is constituted by the 5-50wt% aromatic component, 30- 90wt% paraffin component, and the naphthene components of 65wt% or less as the third component. The boiling point of the solvent is specified in 130-300 deg.C. The solvent of this composition is obtained by the following procedures: The crude oil including 5wt% aromatic component is distilled under the normal pressure; and the fraction in the range of the boiling points of 150-350 deg.C is hydrogenated in a hydrodesulfurization apparatus under the conditions that the reacting temperature is 250-350 deg.C, the reacting pressure is 5-50kg/cm<2>, and the liquid space velocity is 0.5-10V/H/V. Thus the solvent, which is characterized by the excellent solubility and lighting property of the sample and the achievement of the analysis result without dispersion, can be obtained. |
