Analyzing Brazilian Vehicle Documents for Authenticity by Easy Ambient Sonic-Spray Ionization Mass Spectrometry*

作者：Romao Wanderson^*; Vaz Boniek G; Lalli Priscila M; Bueno Maria Izabel M S; Correa Deleon N; Telles Virginia L C N; de Castro Eustaquio V R; Eberlin Marcos N

来源：Journal of Forensic Sciences, 2012, 57(2): 539-543.

DOI：10.1111/j.1556-4029.2011.02005.x

• forensic science
• questioned documents
• desorption
• ionization techniques
• ambient mass spectrometry
• EASI-MS
• Brazilian vehicle documents

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 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.

• 出版日期2012-3