Determination of Saturate, Aromatic, Resin, and Asphaltenic (SARA) Components in Crude Oils by Means Of Infrared and Near-Infrared Spectroscopy

摘要

Eighteen crude oils and condensates have been investigated by mean of infrared (IR) and near-infrared spectroscopy (NIR) and high-performance liquid chromatograph (HPLC). By means of HPLC the samples have been separated into four chemical group classes, namely saturates, aromatics, resins, and asphaltenes, the so-called SAREA fractions. Using multivariate analysis techniques such as principal component analysis (PCA) and partial least-squares analysis (PLS), the predictive ability of the spectroscopic techniques with regard to the SARA components have been explored.