6.GPC、LD/MS、LC/MS分析で測定した重質炭化水素の平均分子量

抄録

Molecular weight distribution of heavy oil fraction was investigated using LD/MS. Molecular weight by LD/MS (MWms) was larger than that measured by GPC using polystylene (MWps) as calibration standards at MWps less than 800, the both was almost the same at MW of 800-1600, but MWms was almost constant (about 1800) at MWps higher than 2000, showing the same tendency as H/C variation. These results suggests that the average MW of single molecule of asphaltene is limited at about 1800, and the higher MW was resulted by the aggregation of such molecules.