Absorption Wavebands for Discriminating Oxidation Time of Engine Oil as Detected by FT-IR Spectroscopy

Authors

Ali Mazin Abdul-Munaim, University of BaghdadFollow
Torrey Holland, Southern Illinois University CarbondaleFollow
Poopalasingam Sivakumar, Southern Illinois University CarbondaleFollow
Dennis G. Watson, Southern Illinois University CarbondaleFollow

Abstract

Fourier Transform-Infrared (FT-IR) spectroscopy was used to analyze gasoline engine oil (SAE 5W20) samples that were exposed to seven different oxidation times (0 h, 24 h, 48 h, 72 h, 96 h, 120 h, and 144 h) to determine the best wavenumbers and wavenumber ranges for the discrimination of the oxidation times. The thermal oxidation process generated oil samples with varying total base number (TBN) levels. Each wavenumber (400–3900 cm􀀀1) and wavenumber ranges identified from the literature and this study were statistically analyzed to determine which wavenumbers and wavenumber ranges could discriminate among all oxidation times. Linear regression was used with the best wavenumbers and wavenumber ranges to predict oxidation time.

Recommended Citation

Abdul-Munaim, Ali M., Holland, Torrey, Sivakumar, Poopalasingam and Watson, Dennis G. "Absorption Wavebands for Discriminating Oxidation Time of Engine Oil as Detected by FT-IR Spectroscopy." Lubricants 7, No. 3 (Mar 2019). doi:10.3390/lubricants7030024.