Analysis of Indian blue ballpoint pen inks tagged with rare-earth thenoyltrifluoroacetonates by inductively coupled plasma–mass spectrometry and instrumental neutron activation analysis

Maind, S.D.; Kumar, Sumit; Chattopadhyay, N.; Gandhi, Ch.; Sudersanan, M.

doi:10.1016/j.forsciint.2005.05.037

Cited by 26 publications

(11 citation statements)

References 25 publications

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“…Essa evolução na área de MS se deve principalmente ao surgimento de novos sistemas de ionização, como EASI (easy ambient sonic-spray ionization), DESI (desorption electrospray ionization) e DART (direct analysis in real time). [16][17][18][19][20][21][22][23][24] A partir de 2005, vários trabalhos começaram a ser publicados (13 publicações e 151 citações, respectivamente) sendo, atualmente, a EASI uma das técnicas usadas pela Polícia Federal Brasileira na investigação da autenticidade de documentos questionados.…”

Section: Introductionunclassified

Química forense: perspectivas sobre novos métodos analíticos aplicados à documentoscopia, balística e drogas de abuso

Romão¹,

Schwab²,

Bueno³

et al. 2011

Quím. Nova

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Section: Introductionunclassified

Química forense: perspectivas sobre novos métodos analíticos aplicados à documentoscopia, balística e drogas de abuso

Romão¹,

Schwab²,

Bueno³

et al. 2011

Quím. Nova

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“…Although these methods have proved to improve the informative value of inks, they a) are focused to historical and artistic prints rather than forensic analysis of contemporary documents, b) still lack good precision, c) have poor sensitivity and quantitative capabilities, and/or d) are destructive to the sample [10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Micro-spectrochemical analysis of document paper and gel inks by laser ablation inductively coupled plasma mass spectrometry and laser induced breakdown spectroscopy

Trejos

Flores²,

Almirall

2010

Spectrochimica Acta Part B: Atomic Spectroscopy

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“…The inorganic analysis of ink has been also reported in the literature and has shown its potential to improve the discrimination value of the evidence [Polk 1977;Ferrero 1999;Rozic et al, 2005;Malzer et al2004;Ouija et al 2005 Moreover, some limitations remain on the existing methods; such as: a) the sensitivity does not allow the detection of elements present at trace elements, [Polk 1977, Zieba-Palus et al, 2008 b) the depth of the x-ray penetration its not easily controlled by the operator and may affect the results, [Zieba-Palus et al, 2006, Zieba-Palus et al, 2008 c) the contribution of the paper and the ink can not be easily isolated, [Malzer et al, 2004, Zieba-Palus et al, 2006, d) the technique is not readily available in forensic laboratories [Grassi 2007, Oujja 2005, Melessanaki et al, 2001], f) the technique consumes large amount of sample which may not be available or acceptable in a particular case [Spence et al, 2000;Rozic et al, 2005;Maind et al, 2006;Maind et al, 2008] or g) the technique is mainly qualitative [Polk 1977, Ferrero 1999, Ouija 2005, Zieba-Palus et al, 2008.…”

Section: The Astm Standard Guide For Test Methods For Forensic Writinmentioning

confidence: 99%

Evaluation of the Evidential Value of the Elemental Composition of Glass, Ink and Paper by Laser-Based Micro-Spectrochemical Methods

Trejos¹

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DEDICATIONThis dissertation is dedicated to my family, especially to my husband and my mom who are my day-to-day inspiration. I have learned from you both how to be perseverant and keep believing in our dreams. I also dedicate this work to my lovely kids: Montserrat and Anthony, being your mom has been God's greatest gift and privilege. In the first part of this study, the analytical performance of LIBS and LA-ICP-MS methods was evaluated for paper, writing inks and printing inks. A total of 350 ink specimens were examined including black and blue gel inks, ballpoint inks, inkjets and toners originating from several manufacturing sources and/or batches. The paper collection set consisted of over 200 paper specimens originating from 20 different paper sources produced by 10 different plants.Micro-homogeneity studies show smaller variation of elemental compositions within a single source (i.e., sheet, pen or cartridge) than the observed variation between different sources (i.e., brands, types, batches). Significant and detectable differences in the elemental profile of the inks and paper were observed between samples originating from different sources (discrimination of 87 -100% of samples, depending on the sample set under investigation and the method applied). These results support the use of vii elemental analysis, using LA-ICP-MS and LIBS, for the examination of documents and provide additional discrimination to the currently used techniques in document examination.In the second part of this study, a direct comparison between four analytical methods (µ-XRF, solution-ICP-MS, LA-ICP-MS and LIBS) was conducted for glass analyses using interlaboratory studies. The data provided by 21 participants were used to assess the performance of the analytical methods in associating glass samples from the same source and differentiating different sources, as well as the use of different match criteria (confidence interval (±6s, ±5s, ±4s, ±3s, ±2s), modified confidence interval, t-test (sequential univariate, p=0.05 and p=0.01), t-test with Bonferroni correction (for multivariate comparisons), range overlap, and Hotelling's T 2 tests. Error rates (Type 1 and Type 2) are reported for the use of each of these match criteria and depend on the heterogeneity of the glass sources, the repeatability between analytical measurements, and the number of elements that were measured. The study provided recommendations for analytical performance-based parameters for µ-XRF and LA-ICP-MS as well as the best performing match criteria for both analytical techniques, which can be applied now by forensic glass examiners.

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Analysis of Indian blue ballpoint pen inks tagged with rare-earth thenoyltrifluoroacetonates by inductively coupled plasma–mass spectrometry and instrumental neutron activation analysis

Cited by 26 publications

References 25 publications

Química forense: perspectivas sobre novos métodos analíticos aplicados à documentoscopia, balística e drogas de abuso

Química forense: perspectivas sobre novos métodos analíticos aplicados à documentoscopia, balística e drogas de abuso

Micro-spectrochemical analysis of document paper and gel inks by laser ablation inductively coupled plasma mass spectrometry and laser induced breakdown spectroscopy

Evaluation of the Evidential Value of the Elemental Composition of Glass, Ink and Paper by Laser-Based Micro-Spectrochemical Methods

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