Selective gas-phase capture of explosives on metal β-diketonate polymers
| Autor: | Thomas J. Wenzel, Scott D. Harvey |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
chemistry.chemical_classification
Organic peroxide Chromatography Gas Chromatography Polymers Air Organic Chemistry Nitro compound General Medicine Biochemistry Peroxide Analytical Chemistry chemistry.chemical_compound Explosive Agents chemistry Lanthanum Metals Organometallic Compounds Kovats retention index Trinitrotoluene Indicators and Reagents Gas chromatography Nitrate ester Benzene |
| Zdroj: | Journal of Chromatography A. 1192:212-217 |
| ISSN: | 0021-9673 |
| DOI: | 10.1016/j.chroma.2008.03.078 |
| Popis: | A variety of metal beta-diketonate polymers were assessed for gas-phase selective retention of nitro aromatic, nitrate ester, and peroxide explosives. The La(III) complex of p-di(4,4,5,5,6,6,6-heptafluoro-1,3-hexanedionyl)benzene [La(dihed)] showed 13-42 times the retention for the nitro aromatic compounds compared to a control column (identical column but lacking the 5% loading of the metal beta-diketonate polymer). Nitrate esters, the peroxide explosive triacetone triperoxide, and the taggant 1,4-dimethyl-1,4-dinitrobutane were too strongly retained to elute from the La(dihed) column; however, these compounds could be eluted from the less retentive Cu(dihed) or Zn(dihed) columns. A Kováts index of 2124 for 2,4,6-trinitrotoluene (TNT) on the La(dihed) column compared to 1662 on the control illustrates the excellent discrimination against nonpolar hydrocarbons, the principal matrix interference expected in air samples. A proof-of-principle experiment demonstrated analysis of an extrapolated 47 part-per-trillion (ppt) (v/v) of TNT in an air extract concentrate. |
| Databáze: | OpenAIRE |
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