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NCJRS Abstract

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NCJ Number: 73257 Find in a Library
Title: Study of the Use of 2-Nitroso-1-Naphthol as a Trace Metal Detection Reagent
Journal: Journal of Forensic Sciences  Volume:25  Issue:4  Dated:(October 1980)  Pages:810-814
Author(s): C W Kokocinski; D J Brundage; J D Nicol
Date Published: 1980
Page Count: 5
Format: Article
Language: English
Country: United States of America
Annotation: A 0.5 percent 2-nitroso-1-napthol acetone solution was studied for its potential as a trace metal detection reagent.
Abstract: To prove or disprove the assumption that certain metallic objects used at a crime scene were actually used by the suspect or victim, forensic scientists have developed several trace metal detection techniques. Recently, it has been suggested that 2-nitroso-1-napthol can be used as a spray reagent to form reactions with various trace metals that are visible without special viewing and photographic equipment. To fully investigate the potential of this reagent, several factors affecting the color and pattern formation were studied at a forensic laboratory at the University of Illinois. Results of the experiment indicated that a metal object must be held for approximately 1.5 minutes for satisfactory color and pattern formation to be observed. Metal ions transferred through a brief period of holding can be detected within 3 hours. Best results were obtained on individuals with high levels of perspiration. That more than one metallic object was held can be revealed if the objects are made of different metals or have distinct shapes or sizes. Tables, photographs, and six references are included. (Author abstract modified)
Index Term(s): Criminal investigation; Evidence collection; Metal identification; Trace evidence
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