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US 7,745,227 B2Granted
System for analysis of explosives
AssigneeLawrence Livermore National Security, LLC
InventorJeffrey S. Haas
Life of this patent
Estimating the term…
Abstract
A system for analysis of explosives. Samples are spotted on a thin layer chromatography plate. Multi-component explosives standards are spotted on the thin layer chromatography plate. The thin layer chromatography plate is dipped in a solvent mixture and chromatography is allowed to proceed. The thin layer chromatography plate is dipped in reagent 1. The thin layer chromatography plate is heated. The thin layer chromatography plate is dipped in reagent 2.
Claims2
A method for analyzing samples for
- explosives, comprising the steps of:
- providing a thin layer chromatography plate,
- providing a tank,
- providing a solvent mixture,
- providing a reagent 1,
- providing a reagent 2, and
- performing the following combination of steps in the following order:
- Step 1, mark locations for the samples on said thin layer chromatography plate,
- Step 2, spot samples on said thin layer chromatography plate at said locations,
- Step 3, spot multi-component explosives standards on said thin layer chromatography plate at said locations,
- Step 4, add said solvent mixture to said tank,
- wherein said solvent mixture is formulated as follows:
- 80 ml hexane+10 ml isopropanol+3 ml N,N-dimethylformamide+5 ml p-xylene+5 ml of methoxyethanol,
- Step 5, dip said thin layer chromatography plate in said solvent mixture and allow chromatography to proceed,
- Step 6, dip said thin layer chromatography plate in said reagent I and monitor for color to indicate explosives,
- Step 7, heat said thin layer chromatography plate, and
- Step 8, dip said thin layer chromatography plate in said reagent 2 and monitor for color to indicate explosives.
14 more elements
A method for analyzing samples for
- explosives, comprising the steps of:
- providing a thin layer chromatography plate,
- providing a tank,
- providing a solvent mixture,
- providing a reagent 1,
- providing a reagent 2, and
- performing the following combination of steps in the following order:
- Step 1, mark locations for the samples on said thin layer chromatography plate,
- Step 2, spot samples on said thin layer chromatography plate at said locations,
- Step 3, spot multi-component explosives standards on said thin layer chromatography plate at said locations,
- Step 4, add said solvent mixture to said tank,
- Step 5, dip said thin layer chromatography plate in said solvent mixture and allow chromatography to proceed,
- Step 6, dip said thin layer chromatography plate in said reagent I and monitor for color to indicate explosives,
- wherein Step 6 of dipping said thin layer chromatography plate in reagent I comprises dipping said thin layer chromatography plate in reagent I formulated as follows:
- 10 ml of tetra-butylammonium hydroxide 40% in water, i.e., 1.5N is added to 90 ml of an iso-propanol/water (50:50) mixture, and adding 0.5 grams of sodium hydroxide to that mixture,
- Step 7, heat said thin layer chromatography plate, and Step 8, dip said thin layer chromatography plate in said reagent 2, and monitor for color to indicate explosives,
- Step 8, dip said thin layer chromatography plate in said reagent 2 and monitor for color to indicate explosives.
14 more elements
Dependencies are inferred from the claim text.