Statistical discrimination of black gel pen inks analysed by laser desorption/ionization mass spectrometry


Autoria(s): Weyermann C.; Bucher L.; Majcherczyk P.; Mazzella W.; Roux C.; Esseiva P.
Data(s)

01/04/2012

Resumo

Pearson correlation coefficients were applied for the objective comparison of 30 black gel pen inks analysed by laser desorption ionization mass spectrometry (LDI-MS). The mass spectra were obtained for ink lines directly on paper using positive and negative ion modes at several laser intensities. This methodology has the advantage of taking into account the reproducibility of the results as well as the variability between spectra of different pens. A differentiation threshold could thus be selected in order to avoid the risk of false differentiation. Combining results from positive and negative mode yielded a discriminating power up to 85%, which was better than the one obtained previously with other optical comparison methodologies. The technique also allowed discriminating between pens from the same brand.

Identificador

https://serval.unil.ch/?id=serval:BIB_7E7A606A2ECD

isbn:1872-6283 (Electronic)

pmid:22115723

doi:10.1016/j.forsciint.2011.10.040

http://my.unil.ch/serval/document/BIB_7E7A606A2ECD.pdf

http://nbn-resolving.org/urn/resolver.pl?urn=urn:nbn:ch:serval-BIB_7E7A606A2ECD6

isiid:000303209700027

Idioma(s)

en

Direitos

info:eu-repo/semantics/openAccess

Fonte

Forensic Science International, vol. 217, no. 1-3, pp. 127-133

Tipo

info:eu-repo/semantics/article

article