Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

    We have a manual that explains all the features 

Record number 433616
Title Identification and age estimation of blood stains on colored backgrounds by near infrared spectroscopy
Author(s) Edelman, G.; Manti, V.; Ruth, S.M. van; Leeuwen, T. van; Aalders, M.
Source Forensic Science International 220 (2012)1-3. - ISSN 0379-0738 - p. 239 - 244.
Department(s) RIKILT B&T Authenticiteit en Nutrienten
BU Microbiological & Chemical Food Analysis
Publication type Refereed Article in a scientific journal
Publication year 2012
Keyword(s) least-squares regression - transmission spectroscopy - human serum - bloodstains - glucose - hemoglobin - resonance - proteins - spectra - albumin
Abstract Non-destructive identification and subsequent age estimation of blood stains are significant steps in forensic casework. The latter can provide important information on the temporal aspects of a crime. As previously shown, visible spectroscopy of blood stains on white backgrounds can successfully be used for their identification and age estimation. The use of this technique however, is hampered by dark backgrounds. In the present study the feasibility to use near infrared (NIR) spectroscopy was evaluated for blood stain identification and age estimation on dark backgrounds. Using NIR reflectance spectroscopy, blood stains were distinguished from other substances with 100% sensitivity and 100% specificity. In addition, Partial Least Squares Regression analysis was applied to estimate the age of blood stains on colored backgrounds. The age of blood stains up to 1 month old was estimated successfully with a root mean squared error of prediction of 8.9%. These findings are an important step toward the practical implementation of blood stain identification and age estimation in forensic casework, where a large variety of backgrounds can be encountered.
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