Investigations of Thin Layer Chromatographic Techniques Used for Forensic Explosives Analysis in the Early 1970s

Volume 38, Issue 4 (July 1993)

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ISSN: 0022-1198
CODEN: JFSCA
Page Count: 10

Investigations of Thin Layer Chromatographic Techniques Used for Forensic Explosives Analysis in the Early 1970s
Hiley, RW
Principal Scientific Officer, Forensic Explosives Dept., Defence Research Agency,

(Received 26 October 1992; accepted 5 January 1993)

Abstract

The article describes three brief experimental studies of the thin layer chromatographic (TLC) techniques used for forensic explosive investigations at Royal Armament Research and Development Establishment at Woolwich (RARDE Woolwich) in 1974. The first study demonstrated that 200 ng amounts of nitroglycerine (NG) and pentaerythritol tetranitrate (PETN) in TLC spots visualized using the sodium hydroxide/Griess system can be recovered and reanalyzed using a second TLC eluent. In the second study the characteristics of a titanium(III) chloride/4-dimethylaminobenzaldehyde visualization system for nitrotoluenes were investigated. In the third study it was shown that under certain conditions the rate of PETN spot color development after Griess reagent spray could be very slow in comparison with that of NG.

Keywords:
criminalistics, forensic science, thin-layer chromatography, explosives, nitroglycerine, pentaerythritol tetranitrate, Griess reagent, titanium(III) chloride, dimethylaminobenzaldehyde

Paper ID: JFS13483J
DOI: 10.1520/JFS13483J
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Author Title Investigations of Thin Layer Chromatographic Techniques Used for Forensic Explosives Analysis in the Early 1970s Symposium , 0000-00-00 Committee E30

		SEDL / Journals / Journal of Forensic Sciences (JOFS) / Citation Page Volume 38, Issue 4 (July 1993) Click here to download this paper now for $25 PDF (496K) View License Agreement ISSN: 0022-1198 CODEN: JFSCA Page Count: 10 Investigations of Thin Layer Chromatographic Techniques Used for Forensic Explosives Analysis in the Early 1970s Hiley, RW Principal Scientific Officer, Forensic Explosives Dept., Defence Research Agency, (Received 26 October 1992; accepted 5 January 1993) Abstract The article describes three brief experimental studies of the thin layer chromatographic (TLC) techniques used for forensic explosive investigations at Royal Armament Research and Development Establishment at Woolwich (RARDE Woolwich) in 1974. The first study demonstrated that 200 ng amounts of nitroglycerine (NG) and pentaerythritol tetranitrate (PETN) in TLC spots visualized using the sodium hydroxide/Griess system can be recovered and reanalyzed using a second TLC eluent. In the second study the characteristics of a titanium(III) chloride/4-dimethylaminobenzaldehyde visualization system for nitrotoluenes were investigated. In the third study it was shown that under certain conditions the rate of PETN spot color development after Griess reagent spray could be very slow in comparison with that of NG. Keywords: criminalistics, forensic science, thin-layer chromatography, explosives, nitroglycerine, pentaerythritol tetranitrate, Griess reagent, titanium(III) chloride, dimethylaminobenzaldehyde Paper ID: JFS13483J DOI: 10.1520/JFS13483J ASTM International is a member of CrossRef. Author Title Investigations of Thin Layer Chromatographic Techniques Used for Forensic Explosives Analysis in the Early 1970s Symposium , 0000-00-00 Committee E30