Patent ID: 8969095
Filing Date: 2015-03-03
Classification: G01N,Y10T

Abstract:
1. A method for detecting the presence of explosive elements comprising: a) swiping an object to obtain a test sample using a sample element having a swipe pad; b) positioning said sample element in a sample holder in a testing device and retaining said sample element with a sample retainer; c) applying a first reagent fluid from a fluid container on said swipe pad, the first reagent being a mixture of a titanium metal oxide salt complex, one of an aniline or aniline derivative in a water solution, and ethanol; d) evaluating said swipe pad for yellow color indicating peroxide; e) activating a heater disposed under said sample element programmed to raise said swipe pad from approximately a temperature of 35 degrees to 115 degrees centigrade; f) evaluating said swipe pad for yellow color intensity indicating HMTD or TATP; g) evaluating said swipe pad for blue color indicating chlorate; h) applying a second reagent fluid from a fluid container on said swipe pad, the second reagent being a mixture of tetrabutylammonium hydroxide and ethanol and water; i) activating said heater programmed to raise said swipe pad from approximately 115 degrees centigrade to approximately 135 degrees centigrade and maintaining the temperature for at least approximately 6 to 8 seconds; j) evaluating said swipe pad for yellow-orange color for tetryl, blue hue colors for DNT and DNB, and brick red for TNT; k) activating said heater programmed to raise said swipe pad from approximately 135 degrees centigrade to approximately 165 degrees centigrade; l) applying a third reagent fluid from a fluid container on said swipe pad, the third reagent being a mixture of phosphoric acid, sulfanilic acid, N-(1-naphthyl)ethylenediamine dihydrochloride and a solvent; and m) evaluating said swipe pad for purple-fuchsia hue for HME/HE nitrates-nitrites, and for sugar.