Analiza zmienności wewna̧trzobiektowej czarnych past długopisowych wykonana na podstawie danych z widm podczerwieni uzyskanych technika̧ całkowitego odbicia wewnȩtrznego

Translated title of the contribution: Investigating within-group variations of black ballpoint pen inks based on data obtained by micro-attenuated total reflectance / fourier transform infrared spectroscopy

Loong Chuen Lee, Abdul Aziz Jemain

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Currently, micro-ATR, one of the simplest nondestructive sampling techniques for FTIR spectroscopy, is continuously being investigated for its forensic applications to the examination of pen inks. This study aimed to explore the utility of micro-ATR/FTIR for distinguishing among models produced by a specific manufacturer (brand). A total of 14 black ballpoint pen varieties representing three separate brands were collected and analyzed. IR spectra were compared using the Pearson correlation coefficient after standardization. Then, a modified correlation coefficient was calculated to assist in evaluation of intra- and intervariability present in inks. in general, the within-model variability was slightly higher than the within-brand variability. And pen models that differed only in terms of pen point sizes could contain a highly similar ink formulation. The within-brand variations varied depending on the manufacturer. in conclusion, micro-ATR FTIR spectroscopy is reproducible and can potentially be used to differentiate pens of the same make, but different models.

Original languageUndefined/Unknown
Pages (from-to)689-701
Number of pages13
JournalZ Zagadnien Nauk Sadowych
Volume96
Publication statusPublished - 2013

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Ink
Fourier Transform Infrared Spectroscopy
Spectrum Analysis

Keywords

  • Differentiation index
  • Forensic inks analysis
  • FTIR spectroscopy
  • Within-group variation

ASJC Scopus subject areas

  • Pathology and Forensic Medicine

Cite this

@article{937916357bd040ba84ac9bbf115c9a94,
title = "Analiza zmienności wewna̧trzobiektowej czarnych past długopisowych wykonana na podstawie danych z widm podczerwieni uzyskanych technika̧ całkowitego odbicia wewnȩtrznego",
abstract = "Currently, micro-ATR, one of the simplest nondestructive sampling techniques for FTIR spectroscopy, is continuously being investigated for its forensic applications to the examination of pen inks. This study aimed to explore the utility of micro-ATR/FTIR for distinguishing among models produced by a specific manufacturer (brand). A total of 14 black ballpoint pen varieties representing three separate brands were collected and analyzed. IR spectra were compared using the Pearson correlation coefficient after standardization. Then, a modified correlation coefficient was calculated to assist in evaluation of intra- and intervariability present in inks. in general, the within-model variability was slightly higher than the within-brand variability. And pen models that differed only in terms of pen point sizes could contain a highly similar ink formulation. The within-brand variations varied depending on the manufacturer. in conclusion, micro-ATR FTIR spectroscopy is reproducible and can potentially be used to differentiate pens of the same make, but different models.",
keywords = "Differentiation index, Forensic inks analysis, FTIR spectroscopy, Within-group variation",
author = "Lee, {Loong Chuen} and Jemain, {Abdul Aziz}",
year = "2013",
language = "Undefined/Unknown",
volume = "96",
pages = "689--701",
journal = "Z Zagadnien Nauk Sadowych",
issn = "1230-7483",
publisher = "Instytut Ekspertyz Sadowych",

}

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T1 - Analiza zmienności wewna̧trzobiektowej czarnych past długopisowych wykonana na podstawie danych z widm podczerwieni uzyskanych technika̧ całkowitego odbicia wewnȩtrznego

AU - Lee, Loong Chuen

AU - Jemain, Abdul Aziz

PY - 2013

Y1 - 2013

N2 - Currently, micro-ATR, one of the simplest nondestructive sampling techniques for FTIR spectroscopy, is continuously being investigated for its forensic applications to the examination of pen inks. This study aimed to explore the utility of micro-ATR/FTIR for distinguishing among models produced by a specific manufacturer (brand). A total of 14 black ballpoint pen varieties representing three separate brands were collected and analyzed. IR spectra were compared using the Pearson correlation coefficient after standardization. Then, a modified correlation coefficient was calculated to assist in evaluation of intra- and intervariability present in inks. in general, the within-model variability was slightly higher than the within-brand variability. And pen models that differed only in terms of pen point sizes could contain a highly similar ink formulation. The within-brand variations varied depending on the manufacturer. in conclusion, micro-ATR FTIR spectroscopy is reproducible and can potentially be used to differentiate pens of the same make, but different models.

AB - Currently, micro-ATR, one of the simplest nondestructive sampling techniques for FTIR spectroscopy, is continuously being investigated for its forensic applications to the examination of pen inks. This study aimed to explore the utility of micro-ATR/FTIR for distinguishing among models produced by a specific manufacturer (brand). A total of 14 black ballpoint pen varieties representing three separate brands were collected and analyzed. IR spectra were compared using the Pearson correlation coefficient after standardization. Then, a modified correlation coefficient was calculated to assist in evaluation of intra- and intervariability present in inks. in general, the within-model variability was slightly higher than the within-brand variability. And pen models that differed only in terms of pen point sizes could contain a highly similar ink formulation. The within-brand variations varied depending on the manufacturer. in conclusion, micro-ATR FTIR spectroscopy is reproducible and can potentially be used to differentiate pens of the same make, but different models.

KW - Differentiation index

KW - Forensic inks analysis

KW - FTIR spectroscopy

KW - Within-group variation

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