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Analyzing Brazilian Vehicle Documents for Authenticity by Easy Ambient Sonic‐Spray Ionization Mass Spectrometry *
Author(s) -
Romão Wanderson,
Vaz Boniek G.,
Lalli Priscila M.,
Bueno Maria Izabel M. S.,
Correa Deleon N.,
Telles Virgínia L. C. N.,
de Castro Eustáquio V. R.,
Eberlin Marcos N.
Publication year - 2012
Publication title -
journal of forensic sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.715
H-Index - 96
eISSN - 1556-4029
pISSN - 0022-1198
DOI - 10.1111/j.1556-4029.2011.02005.x
Subject(s) - counterfeit , mass spectrometry , ionization , ambient ionization , phthalate , chemistry , computer science , analytical chemistry (journal) , chromatography , chemical ionization , ion , organic chemistry , political science , law
Using desorption/ionization techniques such as easy ambient sonic‐spray ionization mass spectrometry (EASI‐MS), it is possible to analyze documents of Brazilian vehicles for authenticity, providing a chemical profile directly from the surface of each document. A method for the detection of counterfeit documents is described, and the falsification procedure is elucidated. Forty authentic and counterfeit documents were analyzed by both positive and negative ion modes, EASI(±)‐MS. EASI(+)‐MS results identified the presence of (bis(2‐ethylhexyl)phthalate plasticizer and of dihexadecyldimethylammonium biocide in both types of documents. For EASI(−)‐MS results, the 4‐octyloxybenzoic acid additive ([M + H] + : m/z 249) is present only in counterfeit documents. It was also found that counterfeit vehicle documents are produced via Laserjet printers. Desorption/ionization techniques, such as EASI‐MS, offer therefore, an intelligent way to characterize the counterfeiting method.