In situ examination of handwritten blue ballpoint inks using video spectral comparison with chemometrics

Sauzier, Georgina; McGinn, J.; Trubshoe, Tonya; Lewis, Simon W.

doi:10.1016/j.fsir.2019.100021

Cited by 5 publications

(5 citation statements)

References 8 publications

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“…Outras técnicas de identificação de tintas, porém, são não destrutivas [19], tais como a Espectroscopia no Infravermelho por Transformada de Fourier [23], a Espectroscopia Raman [24], os Comparadores Vídeo Espectrais [18] e a Fluorescência de Raios X [25].…”

Section: Discussionunclassified

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Aplicação da radiação infravermelha na identificação de adulterações em documentos: estudos de casos

Aparecida Buffoni de Campos Carneiro

2023

Rev. Bras. Crimin.

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Este artigo reúne estudos de casos acerca da aplicação da radiação infravermelha como ferramenta assertiva na identificação de sinais de adulteração em documentos. Utilizaram-se nas análises aparelhamento óptico disponível no Núcleo de Perícias Criminalísticas de Ribeirão Preto, permitindo a observação dos materiais periciados tanto sob a luz visível, como sob a radiação eletromagnética na região do infravermelho (radiação infravermelha). O conjunto procedimental aplicado permitiu, em alguns casos, diferenciar tintas de canetas esferográficas que se mostravam idênticas sob luz visível. Suas propriedades físico-químicas produziram, sob análise não destrutiva, distintos perfis ante a luminescência do infravermelho. Outros materiais, porém, demonstraram perfis de luminescência indistinguíveis. Nesses casos, o potencial da propriedade da absorção da radiação infravermelha na busca por características indicativas de adulteração de documentos foi demonstrado por meio da sua capacidade em revelar elementos grafoscópicos, tais como a pressão do traçado sobre o suporte.

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Section: Discussionunclassified

“…Os ensaios foram realizados a partir de adaptações na metodologia de Sauzier e colaboradores [18]. As análises de luminescência infravermelha foram realizadas com a fonte luminosa no comprimento de onda de 530 nm e na intensidade de 15 cd.…”

Section: Metodologiaunclassified

Aplicação da radiação infravermelha na identificação de adulterações em documentos: estudos de casos

Aparecida Buffoni de Campos Carneiro

2023

Rev. Bras. Crimin.

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“…Specifically, some of these techniques include Thin Layer Chromatography (TLC), High-Performance Thin Layer Chromatography (HPTLC), UV-Vis Spectroscopy, Raman Spectroscopy, X-Ray Fluorescence Spectrometer (XRF), Video Spectral Comparator (VSC), and Filtered Light Examination (FLE). Recent studies also incorporated statistical support better to comprehend the results [32,[38][39][40]. The statistical analysis involving chemical data is called chemometric analysis.…”

Section: Incorporation Of Multiple Analysis and Statistical Datamentioning

confidence: 99%

Trends of Forensic Analysis of Pen Ink Using Attenuated Total Reflectance Fourier Transform Infrared (ATR-FTIR) Spectroscopy

et al. 2022

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Many articles have been published on ink analysis to assist Forensic Document Examiner (FDE) in examining questioned documents. Ink analysis encountered about 45% of ballpoint and 24% of gel pen in forensic cases. Typically, ink samples found on the documents are limited to small quantities, requiring non-destructive techniques to preserve the evidence. Previous studies on ink analysis cover about 80% of spectroscopy techniques, including the Attenuated Total Reflectance Fourier Transform Infrared (ATR-FTIR). FDE prefers ATR-FTIR to retain the legibility of evidence since ATR-FTIR is known as non-destructive, fast, reliable, and precise instrumentation. Various modifications and developments to this technique have been published. Therefore, this work reviews the trend of analysis performed on samples of the document and evaluates the current approaches to the capacity of using ATR-FTIR on such samples. Remarks on the comparison studies are also included.

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“…Sci. 2023, 13 documents based on the inorganic and organic characteristics of the writing pen ink matrices [3]. The role of pen ink analysis and the area of questioned document analysis has been significantly growing and is being addressed more in forensic chemistry [4].…”

Section: Introductionmentioning

confidence: 99%

“…Forensic examination of pen inks on documents relies in the first stage on non-destructive and simple tools such as visual and optical examination using microscopy and video spectral comparator (VSC) techniques [12]. Forensic examination of inks using microscopy techniques can be useful only for differentiating different types of ink and discriminating between pens of the same type that vary in mechanical features or color tones [13]. The VSC is considered the first analytical tool that is typically employed by forensic examiners for the primary examination of ink on documents.…”

Section: Introductionmentioning

confidence: 99%

Alleviating Luminescence and Quenching toward Discrimination of Ballpoint Pen Inks Using Spectroscopy and Chromatography Techniques

et al. 2023

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The phenomenon of luminescence and quenching is widely applied in the forensic examination of various ink materials. Here, we introduce a hybrid spectroscopic and chromatography approach to gain insights into the underlying cause of infrared luminescence (IRL) in blue ballpoint (BP) pen inks. A total of thirty BP pen ink samples from the Egyptian market were employed in this study. Insights into the origin of luminescence and quenching in the studied samples were gained based on video spectral comparator (VSC), thin layer chromatography (TLC), ultraviolet–visible (UV–Vis) spectrophotometry, and photoluminescence (PL) spectroscopy. Results showed that some of the studied inks possessed IRL due to the presence of crystal violet and some other triaryl methane dyes. Nevertheless, some ink samples did not possess IRL, despite the presence of the dyes responsible for IRL in their matrix. Interestingly, the inclusion of phthalocyanine dye in those non-luminescent ink matrices resulted in luminescence quenching, mainly due to the overlap between the absorption of phthalocyanine dye and the luminescence of the triarylmethane dyes. The IRL behavior of the ink sample under the first illumination wave band (400–485 nm) exerted control over the IRL activity across subsequent illumination wavebands, and the most effective differentiation was achieved by utilizing the first and second preset filters in VSC. The results revealed the luminescent components present in studied inks and unraveled their distinct luminescence behavior present within the ink matrix. The combination of optical spectroscopy and chromatography techniques could provide a distinctive tool to reveal the luminescence and quenching behaviors of ink dyes for the successful forensic discrimination of several BP writing pens.

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In situ examination of handwritten blue ballpoint inks using video spectral comparison with chemometrics

Cited by 5 publications

References 8 publications

Aplicação da radiação infravermelha na identificação de adulterações em documentos: estudos de casos

Aplicação da radiação infravermelha na identificação de adulterações em documentos: estudos de casos

Trends of Forensic Analysis of Pen Ink Using Attenuated Total Reflectance Fourier Transform Infrared (ATR-FTIR) Spectroscopy

Alleviating Luminescence and Quenching toward Discrimination of Ballpoint Pen Inks Using Spectroscopy and Chromatography Techniques

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