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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...

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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
http://eprints.usm.my/58499/
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spelling my.usm.eprints.58499 http://eprints.usm.my/58499/ Discrimination of matches using ATR-FTIR spectroscopy and chemometrics 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 NonPeerReviewed application/pdf en http://eprints.usm.my/58499/1/NUR%20ADILA%20AZMAN-24%20pages.pdf Azman, Nur Adila (2022) Discrimination of matches using ATR-FTIR spectroscopy and chemometrics. Masters thesis, Universiti Sains Malaysia.
institution Universiti Sains Malaysia
building Hamzah Sendut Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Sains Malaysia
content_source USM Institutional Repository
url_provider http://eprints.usm.my/
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
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
publishDate 2022
url http://eprints.usm.my/58499/1/NUR%20ADILA%20AZMAN-24%20pages.pdf
http://eprints.usm.my/58499/
_version_ 1768007891592151040
score 13.211869

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