title: 1H-NMR with Multivariate Analysis for Automobile Lubricant Comparison.
abstract: Identification of suspected automobile-related lubricants could provide valuable information in forensic cases. We examined that automobile lubricants might exhibit the chemometric characteristics to their individual usages. To compare the degree of clustering in the plots, we co-plotted general industrial oils that were highly dissimilar with automobile lubricants in additive compositions.1H-NMR spectroscopy was used with multivariate statistics as a tool for grouping, clustering, and identification of automobile lubricants in laboratory conditions. We analyzed automobile lubricants including automobile engine oils, automobile transmission oils, automobile gear oils, and motorcycle oils. In contrast to the general industrial oils, automobile lubricants showed relatively high tendencies of clustering to their usages. Our pilot study demonstrated that the comparison of known and questioned samples to their usages might be possible in forensic fields.
authors.affiliation: Department of Chemistry, Center for Proteome Biophysics and Chemistry Institute for Functional Materials, Pusan National University, Busan, 46241, Korea.|National Forensic Service Busan Institute, Yangsan-si, 50612, Korea.
authors.forename: Siwon
authors.initials: S
authors.lastname: Kim
authors.affiliation: Department of Chemistry, Center for Proteome Biophysics and Chemistry Institute for Functional Materials, Pusan National University, Busan, 46241, Korea.
authors.forename: Dahye
authors.initials: D
authors.lastname: Yoon
authors.affiliation: National Forensic Service Busan Institute, Yangsan-si, 50612, Korea.
authors.forename: Dong-Kye
authors.initials: DK
authors.lastname: Lee
authors.affiliation: Department of Chemistry, Center for Proteome Biophysics and Chemistry Institute for Functional Materials, Pusan National University, Busan, 46241, Korea.
authors.forename: Changshin
authors.initials: C
authors.lastname: Yoon
authors.affiliation: Department of Chemistry, Center for Proteome Biophysics and Chemistry Institute for Functional Materials, Pusan National University, Busan, 46241, Korea.
authors.forename: Suhkmann
authors.identifier: http://orcid.org/0000-0002-8320-2489
authors.initials: S
authors.lastname: Kim
keywords: 1H-nuclear magnetic resonance spectroscopy; automobile lubricants; forensic science; multivariate analysis