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NCJRS Abstract

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NCJ Number: 222348 Find in a Library
Title: Dual Fingerprint Reagents with Enhanced Sensitivity: 5-Methoxy- and 5-Methylthioninhydrin
Journal: Journal of Forensic Sciences  Volume:53  Issue:2  Dated:March 2008  Pages:364-368
Author(s): Joseph Almog Ph.D.; Asne Klein M.Sc.; Inbal Davidi M.Sc.; Yaron Cohen M.Sc.; Myriam Azoury M.Sc.; Michal Levin-Elad Ph.D.
Date Published: March 2008
Page Count: 5
Type: Report (Study/Research)
Format: Article
Language: English
Country: United States of America
Annotation: This study's objective was to find more "true" dual reagents that could, in a single reaction, produce fluorescent impressions of latent fingerprints with sufficiently intense color to be observed by the naked eye.
Abstract: The study was successful in creating true dual fingerprint reagents that developed latent fingerprints on paper as colored impressions that also fluoresce in the visible domain. Pre-mixed solutions of 5-methylthioninhydrin (MTN) and 5-methoxyninhydrin (MN) with zinc or cadmium salts are true dual fingerprint reagents. These new formulations are superior to the previously reported dual reagent, Nin/ZNCl2 in all technical aspects. Their major advantages are fluorescence detection at room temperature; more intense color and much more intense fluorescence; and lower concentrations of the ninhydrin analogues. MTN dual reagents are comparable to DFO in the fluorescence mode, and are superior to DFO in producing colored fingermarks. A comprehensive study of the potential and advantages of MTN/metal sale reagent is underway. Genipin continues to be the dual reagent of choice for fingerprints on brown wrapping paper. This report provides detailed descriptions of materials and methods used, working solutions, amino acid stains and "depleted" fingerprints, development conditions, and light absorption and fluorescence observation. 4 figures and 20 references
Main Term(s): Criminology; Fingerprint detection techniques
Index Term(s): Evidence collection; Foreign criminal justice research; Forensic sciences; Investigative techniques; Israel; Latent fingerprints
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