DETERMINATION OF GASOLINE OCTANE NUMBERS BY H-1-NMR AND C-13-NMR SPECTROSCOPY

An equation describing the relationship between the research octane number (RON) and the H-1- and C-13-NMR is proposed. This equation relates the RON to the aliphatic, olefinic and aromatic hydrogen and carbon, respectively. To check this relationship 60 samples were investigated with RON values between 65 and 96. The fitting procedure yielded good agreement between the RON measured with the ASTM method and the RON calculated from both the H-1- and the C-13-NMR.