Peng, Chiong Su (2025) Forensic discrimination of naturally and artificially aged paper using atr-ftir spectroscopy and chemometric techniques. Project Report. Universiti Sains Malaysia. (Submitted)
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Abstract
Aging is a natural process that alters the chemical and physical properties of materials including papers, often complicating its analysis in forensic and preservation contexts. This study aimed to analyse paper samples aged under different conditions (air-drying, oven-drying, and UV exposure) using ATR-FTIR spectroscopy and chemometrics analysis to distinguish naturally aged paper from artificially aged samples. Fresh paper samples were stained using four staining agents (coffee, tea, black vinegar, and dark soy sauce) by dabbing the liquid staining agents onto the paper with cotton wool to ensure uniform application. The stained samples were then subjected to three different aging conditions: air-drying at room temperature for 30 days, oven-drying at 60°C for 1 day, and UV exposure for approximately 4.3 hours to simulate 30 days of natural aging. The fresh, unstained paper served as the baseline for comparison. ATR-FTIR analysis revealed significant spectral changes across the different groups, particularly in the regions corresponding to O–H, C–H, and C=O stretching vibrations, as well as in the fingerprint region (1500–600
| Item Type: | Monograph (Project Report) |
|---|---|
| Uncontrolled Keywords: | Forensic discrimination |
| Subjects: | R Medicine R Medicine > RA Public aspects of medicine > RA1001 Forensic Medicine. Medical jurisprudence. Legal medicine |
| Divisions: | Kampus Kesihatan (Health Campus) > Pusat Pengajian Sains Kesihatan (School of Health Sciences) > Monograph |
| Depositing User: | MUHAMMAD AKIF AIMAN AB SHUKOR |
| Date Deposited: | 27 Oct 2025 00:30 |
| Last Modified: | 29 Dec 2025 07:02 |
| URI: | http://eprints.usm.my/id/eprint/63076 |
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