ELEMENTAL ANALYSIS OF INK BY LASER ABLATION INDUCTIVELY COUPLED PLASMA MASS SPECTROMETRY (LA-ICP-MS)

摘要

In real cases the analysis of questioned documents is undertaken with mostly non-invasive methods of examination of paper base & covering materials. The methods applied should provide reliable and sufficient information to address the following questions like whether the document is genuine, if it has been altered (e.g. erased, bleached, faded) or reproduced, if the covering materials (toners, inks) appearing on each page of document have the common source [1].