The carbon type distribution serves to express the gross composition of the heavier fractions of petroleum into paraffinic, naphthenic and aromatic composition. It is one of the most important parameters for the qualification of base oils, lube oils, process oils or plasticizer because it directly correlates to critical product performance properties.
According to the standard ASTM D3238, the carbon distribution and ring content of olefin-free petroleum oils is calculated from measurements of refractive index, density and molecular weight (by n-d-M method). The mean molecular weight can be calculated following ASTM D2502 from viscosity measurements at 37.78 °C and 98.89 °C (100 °F and 210 °F).
Download this application report to understand how carbon type distributions of petroleum oils are determined with the SVM 4001 and Abbemat.
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