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Differentiation of blue ballpoint pen inks by laser desorption ionization mass spectrometry and high-performance thin-layer chromatography.
J Forensic Sci. 2007 Jan; 52(1):216-20.JF

Abstract

The differentiation of inks on a questioned document can highlight a fraudulent insertion and is usually carried out by optical comparison and thin-layer chromatography (TLC). Laser desorption ionization mass spectrometry (LDI-MS) may also be used for the analysis of dyes from ink. This analytical technique was compared with a standard method of high-performance TLC (HPTLC) according to their capacity to differentiate blue ballpoint inks. Ink entries on paper from 31 blue ballpoint pens have been analyzed and their dye ink formulations compared. The pens were classified into 26 classes by LDI-MS against 18 for HPTLC. LDI-MS proved to be a more powerful method for differentiating ink formulations because it provides information about dye structures (molecular weights) and relative quantification of dye classes (peak areas). Sample preparation was minimal and analysis time was short in contrast to the more complex extraction, application, and development steps of the HPTLC method. However, only basic dyes and pigments were identified using positive mode LDI-MS, while HPTLC did yield additional information about acid dyes.

Authors+Show Affiliations

Institut de Police Scientifique, Lausanne University, Bâtiment Batochime, CH-1015 Lausanne, Switzerland. Celine.Weyermann@unil.chNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

17209941

Citation

Weyermann, Céline, et al. "Differentiation of Blue Ballpoint Pen Inks By Laser Desorption Ionization Mass Spectrometry and High-performance Thin-layer Chromatography." Journal of Forensic Sciences, vol. 52, no. 1, 2007, pp. 216-20.
Weyermann C, Marquis R, Mazzella W, et al. Differentiation of blue ballpoint pen inks by laser desorption ionization mass spectrometry and high-performance thin-layer chromatography. J Forensic Sci. 2007;52(1):216-20.
Weyermann, C., Marquis, R., Mazzella, W., & Spengler, B. (2007). Differentiation of blue ballpoint pen inks by laser desorption ionization mass spectrometry and high-performance thin-layer chromatography. Journal of Forensic Sciences, 52(1), 216-20.
Weyermann C, et al. Differentiation of Blue Ballpoint Pen Inks By Laser Desorption Ionization Mass Spectrometry and High-performance Thin-layer Chromatography. J Forensic Sci. 2007;52(1):216-20. PubMed PMID: 17209941.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Differentiation of blue ballpoint pen inks by laser desorption ionization mass spectrometry and high-performance thin-layer chromatography. AU - Weyermann,Céline, AU - Marquis,Raymond, AU - Mazzella,Williams, AU - Spengler,Bernhard, PY - 2007/1/11/pubmed PY - 2007/1/11/medline PY - 2007/1/11/entrez SP - 216 EP - 20 JF - Journal of forensic sciences JO - J Forensic Sci VL - 52 IS - 1 N2 - The differentiation of inks on a questioned document can highlight a fraudulent insertion and is usually carried out by optical comparison and thin-layer chromatography (TLC). Laser desorption ionization mass spectrometry (LDI-MS) may also be used for the analysis of dyes from ink. This analytical technique was compared with a standard method of high-performance TLC (HPTLC) according to their capacity to differentiate blue ballpoint inks. Ink entries on paper from 31 blue ballpoint pens have been analyzed and their dye ink formulations compared. The pens were classified into 26 classes by LDI-MS against 18 for HPTLC. LDI-MS proved to be a more powerful method for differentiating ink formulations because it provides information about dye structures (molecular weights) and relative quantification of dye classes (peak areas). Sample preparation was minimal and analysis time was short in contrast to the more complex extraction, application, and development steps of the HPTLC method. However, only basic dyes and pigments were identified using positive mode LDI-MS, while HPTLC did yield additional information about acid dyes. SN - 0022-1198 UR - https://www.unboundmedicine.com/medline/citation/17209941/Differentiation_of_blue_ballpoint_pen_inks_by_laser_desorption_ionization_mass_spectrometry_and_high_performance_thin_layer_chromatography_ L2 - https://doi.org/10.1111/j.1556-4029.2006.00303.x DB - PRIME DP - Unbound Medicine ER -
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