Estimation of human bloodstains time since deposition using ATR-FTIR spectroscopy and chemometrics in simulated crime conditions

Mengual-Pujante, Miguel; Peran, Antonio J.; Ortiz, Antonio; Pérez Cárceles, María Dolores

Publication:
Estimation of human bloodstains time since deposition using ATR-FTIR spectroscopy and chemometrics in simulated crime conditions

dc.contributor.author	Mengual-Pujante, Miguel
dc.contributor.author	Peran, Antonio J.
dc.contributor.author	Ortiz, Antonio
dc.contributor.author	Pérez Cárceles, María Dolores
dc.contributor.department	Ciencias Sociosanitarias
dc.date.accessioned	2025-02-01T21:48:56Z
dc.date.available	2025-02-01T21:48:56Z
dc.date.issued	2024-06-26
dc.description	This document is the published version of a published work that appeared in final form in Chemometrics and Intelligent Laboratory Systems This document is made available under the CC-BY-NC 4.0 license http://creativecommons.org/licenses/by-nc/4.0 To access the final edited and published work see: https://doi.org/10.1016/j.chemolab.2024.105172
dc.description.abstract	Blood in the form of stains is one of the most frequently encountered fluid in crime scene. Estimation of the time since deposition (TSD) is of great importance to guide the police investigation and the clarification of criminal offences. The time elapsed since deposition is usually estimated by modelling the physicochemical degradation of blood biomolecules over time. This work shows an ATR-FTIR spectroscopy and chemometrics study to estimate TSD of bloodstains on various surfaces and under different ambient conditions (indoor and outdoor). For a period from 0 to 212 days, a total of 960 stains were analyzed. Most of the eleven partial least squares regression (PLSR) models obtained showed a good prediction capacity, with a Residual Predictive Deviation (RPD) value higher than 3, and R2 higher than 0.90. Models for non-rigid supports showed better predictive capacity than those for rigid ones. A non-rigid surface model including the various non-rigid surfaces and ambient conditions was elaborated, which might be the most useful one from the criminalistic point of view. These results show that this technique can be a rapid, robust, and trustable tool for in situ determination of the TSD of bloodstains at crime scenes.	es
dc.format	application/pdf	es
dc.format.extent	9	es
dc.identifier.citation	Chemometrics and Intelligent Laboratory Systems - 251 (2024) 105172
dc.identifier.doi	https://doi.org/10.1016/j.chemolab.2024.105172
dc.identifier.issn	Print.: 0169-7439
dc.identifier.issn	Electronic.:1873-3239
dc.identifier.uri	http://hdl.handle.net/10201/149942
dc.language	eng	es
dc.publisher	Elsevier	es
dc.relation	Sin financiación externa a la Universidad	es
dc.relation.publisherversion	https://www.sciencedirect.com/science/article/pii/S0169743924001126?via%3Dihub
dc.rights	info:eu-repo/semantics/openAccess	es
dc.rights	Atribución-NoComercial 4.0 Internacional	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc/4.0/	*
dc.subject	Bloodstain	es
dc.subject	ATR-FTIR spectroscopy	es
dc.subject	Chemometrics	es
dc.subject	Biomolecules	es
dc.subject	Forensic science	es
dc.subject	Criminalistics	es
dc.title	Estimation of human bloodstains time since deposition using ATR-FTIR spectroscopy and chemometrics in simulated crime conditions	es
dc.type	info:eu-repo/semantics/article	es
dspace.entity.type	Publication	es