Detection of trace ink compounds in erased handwritings using electrospray-assisted laser desorption ionization mass spectrometry.
J Mass Spectrom
; 49(6): 445-51, 2014 Jun.
Article
em En
| MEDLINE
| ID: mdl-24913397
ABSTRACT
Writings made with erasable pens on paper surfaces can either be rubbed off with an eraser or rendered invisible by changing the temperature of the ink. However, trace ink compounds still remain in the paper fibers even after rubbing or rendering. The detection of these ink compounds from erased handwritings will be helpful in knowing the written history of the paper. In this study, electrospray-assisted laser desorption ionization/mass spectrometry was used to characterize trace ink compounds remaining in visible and invisible ink lines. The ink compounds were desorbed from the paper surface by irradiating the handwritings with a pulsed laser beam; the desorbed analytes were subsequently ionized in an electrospray plume and detected by a quadrupole time-of-flight mass spectrometry mass analyzer. Because of the high spatial resolution of the laser beam, electrospray-assisted laser desorption ionization/mass spectrometry analysis resulted in minimal damage to the sample documents.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Espectrometria de Massas por Ionização e Dessorção a Laser Assistida por Matriz
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Espectrometria de Massas por Ionização por Electrospray
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Ciências Forenses
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Tinta
Tipo de estudo:
Diagnostic_studies
Idioma:
En
Revista:
J Mass Spectrom
Assunto da revista:
BIOQUIMICA
Ano de publicação:
2014
Tipo de documento:
Article
País de afiliação:
Taiwan