Detection of recent holding of firearms: Improving the sensitivity of the PDT test

Joseph Almog; Karni L. Bar-Or; Amihud Leifer; Yair Delbar; Yinon Harush-Brosh

doi:10.1016/j.forsciint.2014.04.041

Detection of recent holding of firearms: Improving the sensitivity of the PDT test

Joseph Almog^*, Karni L. Bar-Or, Amihud Leifer, Yair Delbar, Yinon Harush-Brosh

^*Corresponding author for this work

Institute of Chemistry

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

Despite the significant improvement of the PDT test for detecting recent contact with firearms, there are still many occasions in which the modified reagent (Ferrotrace™) shows insufficient sensitivity. Two techniques have been devised and tested for the enhancement of the sensitivity of this process: exposure to water vapors and accelerated sweating. Exposure of the hand to water vapors after spraying with the reagent significantly improved the quality of the colored impressions. The average increase was by 1 quality-grade (on an arbitrary scale of 4 grades). The technique is very simple and does not require any particular skill or equipment. Mechanistic aspects of the process are also discussed.

Original language	English
Pages (from-to)	55-59
Number of pages	5
Journal	Forensic Science International
Volume	241
DOIs	https://doi.org/10.1016/j.forsciint.2014.04.041
State	Published - Aug 2014

Keywords

Ferrotrace™
Firearms
Iron complexation
Palmar sweat
Pyridyldiphenyl triazine (PDT)
Trace metal detection test (TMDT)

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10.1016/j.forsciint.2014.04.041

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title = "Detection of recent holding of firearms: Improving the sensitivity of the PDT test",

abstract = "Despite the significant improvement of the PDT test for detecting recent contact with firearms, there are still many occasions in which the modified reagent (Ferrotrace{\texttrademark}) shows insufficient sensitivity. Two techniques have been devised and tested for the enhancement of the sensitivity of this process: exposure to water vapors and accelerated sweating. Exposure of the hand to water vapors after spraying with the reagent significantly improved the quality of the colored impressions. The average increase was by 1 quality-grade (on an arbitrary scale of 4 grades). The technique is very simple and does not require any particular skill or equipment. Mechanistic aspects of the process are also discussed.",

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AU - Delbar, Yair

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KW - Iron complexation

KW - Palmar sweat

KW - Pyridyldiphenyl triazine (PDT)

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Detection of recent holding of firearms: Improving the sensitivity of the PDT test

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