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Type: Artigo
Title: Forensic Application Of X-ray Fluorescence Spectroscopy For The Discrimination Of Authentic And Counterfeit Revenue Stamps
Author: Melendez-Perez
Jose Javier; Correa
Deleon Nascimento; Hernandes
Vinicius Veri; de Morais
Damila Rodrigues; de Oliveira
Rodrigo Borges; de Souza
Wanderley; Santos
Jandyson Machado; Eberlin
Marcos Nogueira
Abstract: Energy-dispersive X-ray fluorescence (ED-XRF) spectroscopy with data treatment via chemometric tools was explored as an analytical protocol to discriminate between authentic and counterfeit revenue stamps. Untreated samples were directly analyzed, and the discrimination was based on the characterization of constituent elements present in the inks and paper. Authentic samples and samples that were suspected of being counterfeit were analyzed at three different areas on their surfaces: the ink-printed area, the non-printed area, and the holographic area. Principal component analysis (PCA) was applied to the data to discriminate between authentic and counterfeit revenue stamps. Major differences in the elemental composition were noted (according to chemometrics and t-test, p < 0.05), and ED-XRF spectroscopy plus PCA protocol is proposed for use by non-specialist operators to screen for counterfeit stamps.
Subject: Forensic Science
Questioned Documents
Energy-dispersive X-ray Fluorescence
Revenue Stamp
Tax Stamp
Editor: Sage Publications Inc
Thousand Oaks
Rights: fechado
Identifier DOI: 10.1177/0003702816645352
Date Issue: 2016
Appears in Collections:Unicamp - Artigos e Outros Documentos

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