Analisis forensik dakwat biru pen mata bulat atas dokumen yang dipertikai dengan kromatografi lapisan nipis berprestasi tinggi (HPTLC)

Translated title of the contribution: Forensic analysis of blue ballpoint pen inks on questioned documents by high performance thin layer chromatography technique (HPTLC)

Loong Chuen Lee, Sitti Mariam Nunurung, Ab Aziz Ishak

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Nowadays, crimes related to forged documents are increasing. Any erasure, addition or modification in the document content always involves the use of writing instrument such as ballpoint pens. Hence, there is an evident need to develop a fast and accurate ink analysis protocol to solve this problem. This study is aimed to determine the discrimination power of high performance thin layer chromatography (HPTLC) technique for analyzing a set of blue ballpoint pen inks. Ink samples deposited on paper were extracted using methanol and separated via a solvent mixture of ethyl acetate, methanol and distilled water (70: 35: 30, v/v/v). In this method, the discrimination power of 89.40% was achieved, which confirm that the proposed method was able to differentiate a significant number of pen-pair samples. In addition, composition of blue pen inks was found to be homogeneous (RSD <2.5%) and the proposed method showed good repeatability and reproducibility (RSD <3.0%). As a conclusion, HPTLC is an effective tool to separate blue ballpoint pen inks.

Original languageUndefined/Unknown
Pages (from-to)226-233
Number of pages8
JournalMalaysian Journal of Analytical Sciences
Volume18
Issue number2
Publication statusPublished - 2014

Fingerprint

Thin layer chromatography
Ink
Methanol
Crime
Water
Chemical analysis

Keywords

  • Ballpoint pen
  • Discrimination power
  • Forensic science
  • High Performance Thin Layer Chromatography
  • Ink analysis

ASJC Scopus subject areas

  • Analytical Chemistry

Cite this

Analisis forensik dakwat biru pen mata bulat atas dokumen yang dipertikai dengan kromatografi lapisan nipis berprestasi tinggi (HPTLC). / Lee, Loong Chuen; Nunurung, Sitti Mariam; Ishak, Ab Aziz.

In: Malaysian Journal of Analytical Sciences, Vol. 18, No. 2, 2014, p. 226-233.

Research output: Contribution to journalArticle

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