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NCJ Number: 234051 Find in a Library
Title: Evaluation of Portable UV-VIS Spectrophotometer for Determination of Time Since Deposition (TSD) of Bloodstains at a Crime Scene - Technology Evaluation
Author(s): John Ballantyne; Erin Hanson
Corporate Author: National Forensic Science Technology Ctr (NFSTC)
United States of America
Date Published: October 2009
Page Count: 10
Sponsoring Agency: National Forensic Science Technology Ctr (NFSTC)
Largo, FL 33773
National Institute of Justice (NIJ)
Washington, DC 20531
NCJRS Photocopy Services
Rockville, MD 20849-6000
Grant Number: 2008-MU-MU-K003
Sale Source: NCJRS Photocopy Services
Box 6000
Rockville, MD 20849-6000
United States of America

National Forensic Science Technology Ctr (NFSTC)
7881 114th Avenue North
Largo, FL 33773
United States of America
Document: PDF
Type: Report (Study/Research) ; Test/Measurement
Format: Document
Language: English
Country: United States of America
Annotation: The Forensic Technologies Center of Excellence (FTCoE) evaluated the performance and features of Implen’s NanoPhotometer, a portable UV-VIS spectrophotometer intended to determine the time since deposition (TSD) of bloodstains at a crime scene.
Abstract: The evaluation demonstrated the NanoPhotometer’s potential to obtain an assessment of the time since deposition of dried blood stains on-site and to simultaneously obtain confirmation of the presence of blood and recover autosomal short tandem repeat (STR) profiles of the donor of the stain from the same bloodstain extract. The use of the NanoPhotometer with 1nm interval measurements allowed for differentiation of blood stains that differed in age by minutes, hours, and days. This instrument could also be used for other purposes in the laboratory, since it has additional functional applications, such as concentration determinations, multi-wavelength scans, absorbance measurements, kinetic assays, and standard curves. A minimal amount of training is needed to operate the NanoPhotometer, such that it can be operated by both technical and non-technical personnel. There are no significant health or safety issues in the operation of this instrument. 3 figures and 1 table
Main Term(s): Criminology
Index Term(s): Blood stains; Blood/body fluid analysis; DNA fingerprinting; Equipment evaluation; NIJ grant-related documents; Police equipment; Time of offense determination
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