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
Thomson Mass Spectrometry Laboratory, Institute of Chemistry, Campinas, SP, Brazil.
J Forensic Sci. 2012 Mar;57(2):539-43. doi: 10.1111/j.1556-4029.2011.02005.x. Epub 2011 Dec 8.
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.
使用诸如简易常压声波喷雾电离质谱法（EASI-MS）等解吸/电离技术，可以分析巴西车辆文件的真伪，直接从每份文件的表面提供化学特征。描述了一种检测伪造文件的方法，并阐明了伪造过程。通过正离子和负离子模式的EASI（±）-MS对40份真实文件和伪造文件进行了分析。EASI（+）-MS结果表明，两种类型的文件中均存在邻苯二甲酸二（2-乙基己基）酯增塑剂和双十六烷基二甲基铵杀菌剂。对于EASI（-）-MS结果，4-辛氧基苯甲酸添加剂（M + H：m/z 249）仅存在于伪造文件中。还发现伪造的车辆文件是通过激光打印机制作的。因此，诸如EASI-MS等解吸/电离技术提供了一种智能的方法来表征伪造方法。
