# US 11,079,369 B2 · Development of dry-deposit trace explosives detection test standards, solutions and methods for deposition

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- Number: US 11,079,369 B2
- Document ID: US11079369B2
- Status: Granted
- Kind: B2
- Application number: 16/037,692
- Filed: 2018-07-17
- Published: 2019-01-24
- Granted: 2021-08-03
- Earliest claimed: 2017-07-19
- Assignees: The Government of the United States of America, as represented by the Secretary of Homeland Security
- Applicants: The Government of the United States of America, as represented by the Secretary of Homeland Security
- Inventors: James E. Deline
- Web page: https://patentgrep.com/patent/US11079369B2

## CPC

- G01N 33/227: {Explosives, e.g. combustive properties thereof}
- G01N 1/2813: {Producing thin layers of samples on a substrate, e.g. smearing, spinning-on (G01N1/30 takes precedence)}
- G01N 1/38: Diluting, dispersing or mixing samples
- G01N 2001/2893: {Preparing calibration standards}
- G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q)

## Abstract

Various embodiments of the present invention are directed towards a system and method to dispense an explosive compound onto a substrate. An example device includes a solvent having the explosive compound dissolved in the solvent to form a sample. A delivery mechanism dispenses the sample in a dispersed manner to sufficiently vaporize the solvent to prevent wicking while dispersing a residue of the explosive compound on the substrate to enable detection by explosive detection tools.

## Claims

### Claim 1

A method to dispense an explosive compound onto a substrate, comprising:
dissolving the explosive compound in a solvent to form a sample;
disposing the sample in a canister;
pressurizing the canister;
coupling the canister to a delivery mechanism, that has a valve, so that the valve couples with the canister;
actuating the delivery mechanism to open the valve;
dispensing the sample from the delivery mechanism and toward the substrate in a dispersed manner so as to sufficiently vaporize the solvent, to prevent wicking, while dispersing a residue of the explosive compound on the substrate, to enable detection by explosive detection tools.

### Claim 2 (depends on 1)

The method of claim 1, further comprising actuating the delivery mechanism to dispense nanodroplets of the sample to cause formation of the residue of the explosive compound on the substrate in a predefined pattern comprising a simulated human fingerprint.