Patent ID: 9188510
Filing Date: 2015-11-17
Classification: G01N,Y10T

Abstract:
1. A method to analyze a swiped sample to identify a chemical composition, comprising: applying one or more test chemicals to a pad with one or more processor controlled dispensers; adjusting the temperature of the pad to a predetermined temperature range at a rate of 10-20° C. per minute to 140° C. using a processor controlled heater; pumping a selected chemical reactant from one of the reservoirs to the pad in a volume of 20-30 μL, upon contact with one or more chemicals in concert with heating and time profiles, displaying a sequence of a plurality of color reactions indicative of one from multiple analytes, including explosives, drugs, or household chemicals; capturing using a camera an image of the pad after the application of chemical at the predetermined temperature range; capturing images between 5-15 seconds and storing as a background image; subtracting the background image from the image for generating a difference value from the two images; and searching a known database to identify the substance.