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Open AccessArticle

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

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Department of Agricultural Machines and Equipment, College of Agricultural Engineering Sciences, University of Baghdad, Baghdad 10071, Iraq
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Department of Physics, Southern Illinois University Carbondale, 1245 Lincoln Dr. Neckers 483-A, Carbondale, IL 62901, USA
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Department of Plant, Soil and Agricultural Systems, Southern Illinois University, Carbondale, IL 62901, USA
*
Author to whom correspondence should be addressed.
Lubricants 2019, 7(3), 24; https://doi.org/10.3390/lubricants7030024
Received: 14 February 2019 / Revised: 3 March 2019 / Accepted: 8 March 2019 / Published: 12 March 2019
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. View Full-Text
Keywords: infrared spectroscopy; engine oil; thermal oxidation; oil life infrared spectroscopy; engine oil; thermal oxidation; oil life
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MDPI and ACS Style

Abdul-Munaim, A.M.; Holland, T.; Sivakumar, P.; Watson, D.G. Absorption Wavebands for Discriminating Oxidation Time of Engine Oil as Detected by FT-IR Spectroscopy. Lubricants 2019, 7, 24.

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