Patent ID: 7241621
Filing Date: 2007-07-10
Classification: G01N

Abstract:
1. A method for determining contamination in marine diesel lubricating oils, comprising: obtaining spectral raw data over a frequency range substantially equivalent to that of ultraviolet visible light for reference lubricating oil samples with known properties and concentrations of lubricating oil contamination; performing chemometric techniques to the spectral raw data obtained in step (a) to develop a calibration model and calibrate the spectral data with actual values for parameters reflecting the level of contamination of the reference samples, said actual values determined by means of conventional analytical methods; obtaining spectra of samples of marine diesel lubricating oil of unknown concentration of contaminants over a frequency range substantially equivalent to that of ultraviolet-visible light; and processing the obtained spectral raw data of step (c) and applying the developed calibration model to the processed data in order to determine the parameters reflecting the level of contaminants present in the marine diesel lubricating oil.