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NCJRS Abstract

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NCJ Number: 239079 Add to Shopping cart Find in a Library
Title: Application of Raman Spectroscopy for an Easy-to-Use, on-Field, Rapid, Nondestructive, Confirmatory Identification of Body Fluids
Author(s): Igor K. Lednev
Date Published: July 2012
Page Count: 80
Sponsoring Agency: National Institute of Justice (NIJ)
Washington, DC 20531
National Institute of Justice/NCJRS
Rockville, MD 20849
NCJRS Photocopy Services
Rockville, MD 20849-6000
Grant Number: 2009-DN-BX-K186
Sale Source: National Institute of Justice/NCJRS
Box 6000
Rockville, MD 20849
United States of America

NCJRS Photocopy Services
Box 6000
Rockville, MD 20849-6000
United States of America
Document: PDF
Type: Report (Study/Research)
Format: Document; Document (Online)
Language: English
Country: United States of America
Annotation: This project developed a novel method for the non-destructive, confirmatory identification of body-fluid traces based on Raman spectroscopy combined with advanced statistics.
Abstract: The study showed the potential of Raman spectroscopy for the nondestructive, confirmatory identification of body-fluid traces, including stains on various substrates and contaminated mixtures. In addition, a program was developed for the automatic identification of body fluids in dry mixtures. The project confirmed the prior hypothesis that the Raman spectroscopic signature of each body fluid is unique and can be used for identification. A library of Raman signatures for blood, semen, vaginal fluid, saliva, and sweat was created, and software for the automatic identification of an unknown sample was developed. The method was expanded to include body-fluid stains on various substrates and contaminated stains. The project demonstrated that mixed samples of body fluids can be identified through automatic mapping if two body fluids are not thoroughly mixed. The dry traces of blood and semen were successfully identified on several substrates of practical importance. Human body fluids were collected from anonymous groups of donors, whose age, race, and gender were disclosed in order to ensure the required diversity and sample size. Samples of each body fluid were obtained from donors who represented five races. Drug traces of body fluids were tested using Raman microscope equipped with a computer-controlled stage for rapid mapping. A new approach to identification used multidimensional spectroscopic signatures to account for sample heterogeneity and variations with donor. The developed software algorithms compared experimental Raman spectra with the library of Raman signatures, providing quantitative measures of similarity. 23 figures, 6 tables, and 22 references
Main Term(s): Forensic sciences
Index Term(s): Blood/body fluid analysis; Evidence collection; NIJ final report; Spectroscopy
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