Khei, Lim Ka and Verma, Rajesh and Tan, Eva Lee Yin and Low, Kah Hin and Ismail, Dzulkiflee and Asri, Muhammad Naeim Mohamad (2023) Rapid and nondestructive analysis of lipstick on different substrates using ATR-FTIR spectroscopy and chemometrics. Journal of Forensic Sciences, 68 (3). pp. 1001-1008. ISSN 0022-1198, DOI https://doi.org/10.1111/1556-4029.15223.
Full text not available from this repository.Abstract
Lipstick can be an important piece of evidence in crimes like murders, rapes, and suicides. Due to its prevalence, it can be an important corroborative evidence in crime reconstruction. The analysis of such evidence can provide an evidentiary link between the suspect, the victim, object, or the crime scene. We report the use of nondestructive ATR-FTIR spectroscopy combined with chemometrics for the classification of 10 brands of lipsticks with nine samples each. Chemometric method of partial least square-discriminant analysis (PLS-DA) has been employed to interpret the data and classify the samples into their respective classes. The PLS-DA model provides an AUC figure above 0.99 in all brands except one; for which it is slightly less at 0.94. We have also tested the traces of these lipstick samples on different substrates treating them as unknowns in the already trained PLS-DA model. 100% of the samples on nine substrates viz. a cotton, nylon, plastic, dry tissue, denim (blue jeans), wet tissue, nitrile gloves, white paper, and polyester were correctly attributed to their source brand. In conclusion, the results suggest that ATR-FTIR combined with the chemometrics is a rapid, nondestructive, and accurate method for the discrimination and source attribution of lipstick. This study has potential for use in actual forensic casework conditions.
| Item Type: | Article |
|---|---|
| Funders: | UNSPECIFIED |
| Uncontrolled Keywords: | ATR-FTIR spectroscopy; chemometrics; lipstick; partial least square-discriminant analysis |
| Subjects: | R Medicine R Medicine > RA Public aspects of medicine > RA1001 Forensic Medicine. Medical jurisprudence. Legal medicine |
| Divisions: | Faculty of Science > Department of Chemistry |
| Depositing User: | Ms Zaharah Ramly |
| Date Deposited: | 13 Jun 2024 01:22 |
| Last Modified: | 13 Jun 2024 01:22 |
| URI: | http://eprints.um.edu.my/id/eprint/38611 |
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