Method for explosives detection

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) placing 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 that is a solution of a tetrabutylammonium hydroxide, an ethanol and a water from a fluid container on said swipe pad;
• d) activating a heater disposed under said sample element;
• e) heating said swipe pad to a first temperature from approximately 35 degrees to approximately 135 degrees centigrade to activate said first reagent fluid with said test sample;
• f) viewing said swipe pad to observe any color change in said test sample;
• g) applying a second reagent fluid that is a solution of a phosphoric acid, a sulfanilic acid, N-(1-naphthyl)ethylenediamine dihydrochloride and a water from a second fluid container on said swipe pad;
• h) activating said heater;
• i) heating said swipe pad to a second temperature from approximately 135 degrees to approximately 165 degrees centigrade to activate said second reagent fluid with said test sample;
• and
• j) viewing said swipe pad to observe any described sequence of color change in said test sample over time and heat profile that may occur.