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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Rapid and direct detection of artificially aged papers employing easy ambient sonic-spray ionization mass spectrometry

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Oliveira, Luan Felipe Campos [1, 2] ; de Morais, Damila Rodrigues [1] ; Correa, Deleon Nascimento [1, 3] ; de Morais Campelo, Jacqueline [4] ; Sussulini, Alessandra [2] ; Eberlin, Marcos Nogueira [1, 5] ; Santos, Jandyson Machado [1, 4]
Total Authors: 7
[1] Univ Campinas UNICAMP, Inst Chem, Thomson Mass Spectrometry Lab, BR-13083970 Campinas, SP - Brazil
[2] Univ Campinas UNICAMP, Inst Chem, Dept Analyt Chem, LaBIOm, BR-13083970 Campinas, SP - Brazil
[3] Criminalist Inst Dr Octavio Eduardo Brito Alvaren, Tech Sci Police Superintendency, BR-05507060 Sao Paulo, SP - Brazil
[4] Fed Rural Univ Pernambuco UFRPE, Dept Chem, BR-52171900 Recife, PE - Brazil
[5] Univ Prebiteriana Mackenzie, BR-01302907 Sao Paulo, SP - Brazil
Total Affiliations: 5
Document type: Journal article
Web of Science Citations: 0

Rationale The effort to make fake documents look real leads to the use of crickets and beverages to produce artificially aged papers, as land titles, based on yellowing caused by the use of these methods. An old practice in Brazil, called ``cricketing{''}, has led to the misappropriation of Brazilian land using these documents. We propose a rapid, simple, instantaneous and non-destructive method to identify artificially aged papers by easy ambient sonic-spray ionization mass spectrometry (EASI-MS) analysis. Methods Three typical aging procedures were used to obtain artificially aged papers using coffee, cola drink, and crickets, with the papers being analyzed by EASI-MS. Multivariate statistical analyses were performed on the data to find the sample groups and to study the most relevant ions of each ageing procedure. High-resolution MS (HRMS) was used to obtain the exact masses and attribute formulae to relevant ions present in the samples. Results The combination of EASI-MS and multivariate statistical analyses allowed us to identify the most relevant ions to classify the adulteration of documents and HRMS identified most of these relevant ions. TMS fingerprinting in combination with multivariate analysis also demonstrated that this approach can qualitatively differentiate all the examined paper samples. Conclusions We developed a cheap, fast and easy method that can help to elucidate counterfeit documents that have been artificially aged, helping to identify chemical additives and one that can be used in forensic laboratories. (AU)

FAPESP's process: 18/01525-3 - Metabolomic studies of depression patients treated with ayahuasca
Grantee:Alessandra Sussulini
Support type: Regular Research Grants