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Título:
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Presumptive tests: A substitute for Benzidine in blood samples recognition
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Autores:
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Gomes, C. ;
López-Matayoshi, C. ;
Palomo-Díez, S. ;
López-Parra, A. M. ;
Cuesta-Alvaro, P. ;
Baeza-Richer, C. ;
Gibaja, J. F. ;
Arroyo-Pardo, E.
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Tipo de documento:
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texto impreso
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Editorial:
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Elsevier, 2019-01-25T16:20:57Z
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Nota general:
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info:eu-repo/semantics/restrictedAccess
https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
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Idiomas:
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Inglés
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Palabras clave:
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Editados por otras instituciones
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Artículos
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Artículos en revistas indizadas
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Resumen:
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The nature of the sample in a forensic case is one of the most important factors, since it determines the posterior analysis, helping to define or discard its identity (like blood versus semen). A presumptive test is a qualitative analysis that allows to identify, or confirm, the presence of a substance in a sample. These determinations usually occur, after a chemical reaction, and a specific colour is produced. A false positive is another substance reacting the same way, producing the expected result. The aim of this work was to evaluate the most effective presumptive test (with fewer false-positives) when analysing products that could look and behave like blood during a forensic screening assay. Eight different products were tested, like Betadine®, and four reagents were considered: Tetramethylbenzidine, O-toluidine, Leuchomalachite green and BlueStar® Forensic (BlueStar). Each product was tested with the reagents five times ? mixed with human blood (3:1), with three different animal blood (3:1), and then unmixed. Our results indicated that Leuchomalachite green is the most suitable presumptive test, since it was the reagent with less false positives. © 2017 Elsevier B.V.
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En línea:
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http://doi.org/10.1016/j.fsigss.2017.09.213
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