One, Two, Four-Triazine-Based Chromogenic Reagents for the Detection of Microtraces of Various Metals Left on Human Skin

• NCJ Number: 231227
• Journal: Journal of Forensic Sciences Volume: 55 Issue: 3 Dated: May 2010 Pages: 747-752
• Author(s): Andrzej Olejniczak, M.Sc.; Aleksandra W. Cyganiuk, M.Sc.; Jerzy P. Lukaszewicz, Ph.D.
• Date Published: May 2010
• Length: 6 pages
• Publication Format: Article
• Publication Type: Report (Study/Research)
• Language: English
• Country: United States of America

Annotation

This article extends the application of 1,2,4-triazine-based chromogenic reagents to the detection of nonferrous metal traces left on contact with canvas and human skin.

Abstract

The possibility of detection of iron traces resulting from contact with objects made of stainless steel was investigated as well. Additionally, the ability of triazines to form chromatic complexes with Zn2+, Ni2+, Co2+, Cu2+, Cr3+, and Al3+ ions was studied spectrophotometrically. Molar absorption coefficients, ranging from 8.8 to 29.9 ~ 10 to the third power/M/cm, provide high sensitivity of 1,2,4-triazines toward nonferrous ions, thus, enabling the detection at concentrations as low as a few ƒÊM. The method was sensitive enough to detect traces resulting from a 1-min contact with a stainless steel made object, which is commonly considered as a corrosion-resistant material. The amounts of metal ions transferred to the skin after a 2-min contact with objects made of brass, zinc, and copper were sufficient to develop chromatic imprints. 3 tables, 3 figures, and 23 references (Published Abstract)