Raman spectroscopy in the measurement of automotive lubricating oils Daniel Queiroz da Silva, Landulfo Silveira Junior, Marcos Tadeu Tavares Pacheco

Abstract

Raman spectroscopy uses the light scattering technique to identify the vibrational frequencies of compounds and obtain a vast amount of information, make comparisons and create new methodologies quickly and non-invasively. Automotive lubricating oil is very important for engine operation, but there are differences between the composition of new and used oils. In this study, the spectral differences between new and used oils were verified using the Raman technique and multidimensional PCA analysis as an additional tool, aiming to determine the differences as a function of time of use. It was found that the Raman spectrum provides relevant information for the analysis of new oils, but has limitations for the analysis of used oils.