Determination of some physicochemical properties in Brazilian crude oil by 1H NMR spectroscopy associated to chemometric approach

An alternative method for establishing crude oil properties, using 1H nuclear magnetic resonance (1H NMR) associated with partial least squares regression is proposed. It can be used for determination of API gravity, carbon residue (CR), wax appearance temperature (WAT) and basic organic nitrogen (BON). At a 95% confidence level, the main results obtained for API gravity, CR, WAT and BON models provide determination coefficients for prediction...