title: The analysis of dyes in ball point pen inks on single paper fibres using laser desorption ionisation time of flight mass spectrometry (LDI-TOFMS).
abstract: An important requisite for the forensic analysis of inks on documents is that damage to the document is avoided or minimised. This paper describes a technique for dye identification in ballpoint pen inks using LDI-TOFMS on single ink bearing paper fibres and its application to a case. A single ink bearing paper fibre can be prised from the surface of the document under a stereo microscope and presented to the instrument for analysis without further treatment. This sampling process causes imperceptible damage to the surface of the document. Clear mass spectrometric identification of the ink dyes is obtained. A case example is provided to illustrate the practical application of the technique.
authors.affiliation: Forensic Science Program, School of Chemical and Physical Sciences, Flinders University, Adelaide, SA 5001, Australia.
authors.forename: Broderick
authors.initials: B
authors.lastname: Matthews
authors.forename: G Stewart
authors.initials: GS
authors.lastname: Walker
authors.forename: Hilton
authors.initials: H
authors.lastname: Kobus
authors.forename: Paul
authors.initials: P
authors.lastname: Pigou
authors.forename: Carolyne
authors.initials: C
authors.lastname: Bird
authors.forename: Glyn
authors.initials: G
authors.lastname: Smith