U.S. flag

An official website of the United States government, Department of Justice.

NCJRS Virtual Library

The Virtual Library houses over 235,000 criminal justice resources, including all known OJP works.
Click here to search the NCJRS Virtual Library

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

NCJ Number
Journal of Forensic Sciences Volume: 55 Issue: 3 Dated: May 2010 Pages: 747-752
Andrzej Olejniczak, M.Sc.; Aleksandra W. Cyganiuk, M.Sc.; Jerzy P. Lukaszewicz, Ph.D.
Date Published
May 2010
6 pages
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.
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)