Abstract: A microfluidic device for the detection of drugs, explosives, chemical warfare, or other substances which is able to directly accept a swab into the device for testing. This device additionally contains on-board reagents to perform colorimetric testing for threshold determination directly in the device. These features are useful in a wide array of situations, such as at security checkpoints, environmental monitoring, clinical analysis, which require testing completely unknown substances and therefore must test for multiple different substances in one test. This is especially useful for police and other law enforcement officials who often must use field-deployable platforms making accurate field-testing critical for safety.

Abstract: A microfluidic device for the detection of drugs, explosives, chemical warfare, or other substances which is able to directly accept a swab into the device for testing. This device additionally contains on-board reagents to perform colorimetric testing for threshold determination directly in the device. These features are useful in a wide array of situations, such as at security checkpoints, environmental monitoring, clinical analysis, which require testing completely unknown substances and therefore must test for multiple different substances in one test. This is especially useful for police and other law enforcement officials who often must use field-deployable platforms making accurate field-testing critical for safety.

Abstract: A substance determination system comprises a chip comprising: a substrate; a microfluidic channel disposed on the substrate; a reagent enclosed in the microfluidic channel; and a substance inlet to the microfluidic channel; a centrifugal device configured to rotate the chip; and a micro-processor device configured to assess the reagent in the crofluidic channel. A method for identifying a substance comprises: inserting a substance into an inlet in a microfluid detection device having a reagent disposed in a microfluid circuit connected to a mixing domain; spinning the microfluid detection device to move the substance and the reagent to the mixing domain; capturing a digital image of a reaction between the substance and the reagent; analyzing the digital image of the reaction to determine a color parameter; comparing the color parameter to a reference parameter of a reference composition; and assessing the comparison to determine if the substance is the reference composition.