Abstract
AbstractQuantitative 13C‐nuclear magnetic resonance has been applied to the determination of the percentage of aromatic carbon atoms (% CA) of Nahorkatia, Ankleshwar (both Indian) and Basrah (Middle‐Eastern) crude oils. From the analysis of these results it has been demonstrated that a combination of the instrumental and chemical methods (gated decoupling with a relaxation reagent added) is the only satisfactory method for the precise determination of % CA The maximum deviation in % CA due to nuclear Overhauser effect has also been estimated.
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