Selective solid-phase microextraction of explosives using fibers coated with the La(III) complex of p-di(4,4,5,5,6,6,6-heptafluoro-1,3-hexanedionyl)benzene
| Autor: | Scott D. Harvey |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Detection limit
Chromatography Polydimethylsiloxane Organic Chemistry Analytical chemistry General Medicine Solid-phase microextraction Biochemistry Gas Chromatography-Mass Spectrometry Analytical Chemistry Taggant chemistry.chemical_compound Explosive Agents chemistry Organometallic Compounds Dimethylpolysiloxanes Fiber Gas chromatography Gas chromatography–mass spectrometry Benzene Solid Phase Microextraction Trinitrotoluene |
| Zdroj: | Journal of Chromatography A. 1213:110-117 |
| ISSN: | 0021-9673 |
| DOI: | 10.1016/j.chroma.2008.10.054 |
| Popis: | This research demonstrates enhanced capture of explosives on polydimethylsiloxane (PDMS) solid-phase microextraction (SPME) fibers coated with a metal β-diketonate polymer, [La(III) complex of p-di(4,4,5,5,6,6,6-heptafluoro-1,3-hexanedionyl)benzene, La(dihed)], compared to PDMS control fibers. SPME sampling was performed in an explosives bunker where the concentration of 2,4,6-trinitrotoluene (TNT) was estimated at less than 3 parts-per-trillion (v/v). Analysis by gas chromatography/mass spectrometry showed an approximate 10-fold enhancement in the quantity of 2,4-dinitrotoluene captured on La(dihed) over the control fiber. La(dihed) sampling also resulted in a strong signal for TNT, whereas this explosive was well below the detection limit (1 pg on fiber) on the control fiber. |
| Databáze: | OpenAIRE |
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