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Procedura analityczna kryminalistycznego badania materiałów kryjących metodą elektroforezy kapilarnej

Joanna MANIA, Joanna BIS, Paweł KOŚCIELNIAK

Abstract

The analytical procedure of inks for fountain pens and ball-point pens was developed with the use of PrinCe 550 capillary electrophoresis system with spectrophotometric detection. The sample was taken from the ink line as few paper microdots of 0.8 mm diameter. The ink sample was extracted from paper with pyridine-water solution (1:1). The detection was performed at 215, 375, 570 and 620 nm. Basing on analyses of both the standard dye mixtures and the real samples it was revealed that under optimised conditions reliable discrimination of inks can be done. The results presented show perspectives for the forensic examination of documents by CE method.


Keywords: Ink analysis; Capillary electrophoresis; Forensic examinations of documents