Dry transfer method for the preparation of explosives test samples
AssigneeThe United States of America as represented by the Secretary of Transportation
InventorRobert T. Chamberlain
Life of this patent
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Abstract
A method of preparing samples for testing explosive and drug detectors of the type that search for particles in air. A liquid containing the substance of interest is placed on a flexible Teflon® surface and allowed to dry, then the Teflon® surface is rubbed onto an item that is to be tested for the presence of the substance of interest. The particles of the substance of interest are transferred to the item but are readily picked up by an air stream or other sampling device and carried into the detector.
Claims15
The method of preparing samples for testing to determine the presence of a substance of interest which comprises preparing a liquid containing the substance of interest;
- depositing said liquid on a flexible Teflon® surface;
- allowing said liquid to dry;
- transferring said substance of interest on said Teflon(& surface to an item;
- and testing said item to determine the presence of said substance of interest.
The method of preparing samples for testing to determine the presence of a substance of interest which comprises preparing a liquid containing said substance of interest;
- depositing said liquid on a non-porous flexible surface;
- allowing said liquid to dry;
- transferring said substance of interest on said non-porous flexible surface to an item;
- and testing said item to determine the presence of said substance of interest.
Dependencies are inferred from the claim text.