Application of MECC-DAD and CZE-MS to examination of color stamp inks for forensic purposes

Król, Małgorzata; Kula, Agnieszka; Kościelniak, Paweł

doi:10.1016/j.forsciint.2013.09.006

Cited by 14 publications

(10 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The greatest value, equal to 0.004 m/z, was found to be the similarity/difference threshold. Thus, two analytes were considered the same if the difference between their m/z values was less than or equal to 0.004 [144].…”

Section: Inksmentioning

confidence: 99%

CE-MS in Forensic Sciences with Focus on Forensic Toxicology

Porpiglia

Giacomazzi

Gottardo

et al. 2016

Capillary Electrophoresis-Mass Spectrometry (CE-MS): Principles and Applications

View full text Add to dashboard Cite

Section: Inksmentioning

confidence: 99%

CE-MS in Forensic Sciences with Focus on Forensic Toxicology

Porpiglia

Giacomazzi

Gottardo

et al. 2016

Capillary Electrophoresis-Mass Spectrometry (CE-MS): Principles and Applications

View full text Add to dashboard Cite

“…These may include other authenticated lease contracts on which the same stamp has been printed or the stamp used by the complainant could be obtained directly to make comparative impressions. While the ink might optically or chemically be characterized (2,3,5), the physical features might also be compared (7). According to the American Society for Testing and Materials (ASTM), two types of characteristics are then analyzed and compared: class characteristics, such as the size and image of the stamp; and individual or particular characteristics, such as defects that are produced due to the use of the stamp (9,10).…”

Section: Introductionmentioning

confidence: 99%

Variability of stamp impression measurements under different apposition conditions

Rulli

Marquis

Fürbach

et al. 2019

Forensic Science International

View full text Add to dashboard Cite

When a forensic document examiner obtains differences in size measurements between a questioned and reference stamp impressions, it may be difficult to assess whether such findings might be due to the use of the same stamp in different apposition conditions or are due to the use of different stamps. To address this issue, the present work has studied the variability of size measurements of stamp impressions apposed in various (pressure, humidity and temperature) conditions. Different stamps were also used to evaluate the influence of the fabricant, the matrix (photopolymer or rubber) and the inking type (selfinking and handstamp). While statistical tests sometimes indicated differences in the results, the measurement distributions overlapped for all kind of conditions (same stamps, different stamps), except for the two stamps produced by different manufacturers. Based on the findings of this study, a difference above 0.09 cm would support the hypothesis that two different stamps were used to produce the impressions. However, size differences below 0.09 cm were also encountered for impressions made using different stamps. The maximal size difference was actually measured for two stamps produced by different manufacturers (up to 0.29 cm).

show abstract

“…CE, in many of its variations and configurations, has been used for the analysis of inks. Different inks, such as fountain pen inks [23], ball point pen inks [24,25], gel inks [26], waterbased inks [27], stamp inks [28] or inkjet inks [29,30] have been analysed by CE. Most of these studies have focused on the comparison of different electrophoretic profiles in order to study similarities between the studied inks [23,26,29,30], while others have focused on the separation and determination of the dyes used [24,25,27].…”

Section: Introductionmentioning

confidence: 99%

A new CE with contactless conductivity detection method for the determination of complex cationic compositions: Application to the analysis of pen inks

et al. 2016

View full text Add to dashboard Cite

A CE with contactless conductivity detection methodology using a novel background electrolyte for the separation and determination of 17 metal cations (Cs , Rb , K , Ca , Na , Mg , Mn , Sr , Li , Ba , Fe , Pb , Cd , Zn , Co , Cu and Ni ) and ammonium has been investigated. The buffer, based on lactic acid and β-alanine, was experimentally compared with other two commonly used electrolytes, showing important improvements, such as shorter analysis times (<11 min), better electrophoretic resolutions and higher detectabilities for certain analytes, such as Fe and Pb . The inclusion of other additives such as 18-Crown-6 and α-hydroxyisobutyric acid was studied in order to obtain the best separation of the analytes of interest. The optimised method was applied to the analysis of 11 water-based pen inks and the determination of their metal composition. The methodology was demonstrated for the comparison and differentiation of pen inks.

show abstract

Application of MECC-DAD and CZE-MS to examination of color stamp inks for forensic purposes

Cited by 14 publications

References 16 publications

CE-MS in Forensic Sciences with Focus on Forensic Toxicology

CE-MS in Forensic Sciences with Focus on Forensic Toxicology

Variability of stamp impression measurements under different apposition conditions

A new CE with contactless conductivity detection method for the determination of complex cationic compositions: Application to the analysis of pen inks

Contact Info

Product

Resources

About