Discrimination of matches using ATR-FTIR spectroscopy and chemometrics

Matches are one of the trace evidence that could be encountered at the crime scenes of arson cases. Forensic analysis of matches may serve as crucial corroborating evidence to link the suspect to the crime scene or the victim. Nonetheless, matches evidence has been overlooked, due to presence of...

Full description

Saved in:

Bibliographic Details
Main Author:	Azman, Nur Adila
Format:	Thesis
Language:	English
Published:	2022
Subjects:	QD71-142 Analytical chemistry
Online Access:	http://eprints.usm.my/58499/1/NUR%20ADILA%20AZMAN-24%20pages.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-usm-ep.58499
record_format	uketd_dc
spelling	my-usm-ep.584992023-05-18T00:33:28Z Discrimination of matches using ATR-FTIR spectroscopy and chemometrics 2022-09 Azman, Nur Adila QD71-142 Analytical chemistry Matches are one of the trace evidence that could be encountered at the crime scenes of arson cases. Forensic analysis of matches may serve as crucial corroborating evidence to link the suspect to the crime scene or the victim. Nonetheless, matches evidence has been overlooked, due to presence of other prominent evidence, often contaminated with other fire post-debris, and trace in quantity. Furthermore, there has been very limited research in the past on the analysis of matches for forensic applications. In the present study, a rapid, non-destructive, sensitive, and reliable analytical technique namely Attenuated Total Reflectance-Fourier Transform-Infrared (ATR-FTIR) spectroscopy has been utilised to differentiate 11 brands of matches samples. Principal Component Analysis- Linear Discriminant Analysis (PCA-LDA) was employed to generate objective interpretation of the results. The 95.8% accuracy of predictive PCA-LDA model was established with almost all matchstick, unburnt match head, and burnt match head correctly classified to their respective brands. The blind test was conducted with two unknown samples (pretended to be unknown to the analyst) in two different conditions, which were correctly link with their respective source. The current work demonstrated a quick, cost-effective, robust, and nondestructive method for differentiation of matches samples in forensic investigation. 2022-09 Thesis http://eprints.usm.my/58499/ http://eprints.usm.my/58499/1/NUR%20ADILA%20AZMAN-24%20pages.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Sains Kesihatan
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	QD71-142 Analytical chemistry
spellingShingle	QD71-142 Analytical chemistry Azman, Nur Adila Discrimination of matches using ATR-FTIR spectroscopy and chemometrics
description	Matches are one of the trace evidence that could be encountered at the crime scenes of arson cases. Forensic analysis of matches may serve as crucial corroborating evidence to link the suspect to the crime scene or the victim. Nonetheless, matches evidence has been overlooked, due to presence of other prominent evidence, often contaminated with other fire post-debris, and trace in quantity. Furthermore, there has been very limited research in the past on the analysis of matches for forensic applications. In the present study, a rapid, non-destructive, sensitive, and reliable analytical technique namely Attenuated Total Reflectance-Fourier Transform-Infrared (ATR-FTIR) spectroscopy has been utilised to differentiate 11 brands of matches samples. Principal Component Analysis- Linear Discriminant Analysis (PCA-LDA) was employed to generate objective interpretation of the results. The 95.8% accuracy of predictive PCA-LDA model was established with almost all matchstick, unburnt match head, and burnt match head correctly classified to their respective brands. The blind test was conducted with two unknown samples (pretended to be unknown to the analyst) in two different conditions, which were correctly link with their respective source. The current work demonstrated a quick, cost-effective, robust, and nondestructive method for differentiation of matches samples in forensic investigation.
format	Thesis
qualification_level	Master's degree
author	Azman, Nur Adila
author_facet	Azman, Nur Adila
author_sort	Azman, Nur Adila
title	Discrimination of matches using ATR-FTIR spectroscopy and chemometrics
title_short	Discrimination of matches using ATR-FTIR spectroscopy and chemometrics
title_full	Discrimination of matches using ATR-FTIR spectroscopy and chemometrics
title_fullStr	Discrimination of matches using ATR-FTIR spectroscopy and chemometrics
title_full_unstemmed	Discrimination of matches using ATR-FTIR spectroscopy and chemometrics
title_sort	discrimination of matches using atr-ftir spectroscopy and chemometrics
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Sains Kesihatan
publishDate	2022
url	http://eprints.usm.my/58499/1/NUR%20ADILA%20AZMAN-24%20pages.pdf
_version_	1776101224948432896

Discrimination of matches using ATR-FTIR spectroscopy and chemometrics

Similar Items