Abstract: A system is provided for identifying the presence of a target molecule or ion. The system comprises a solid support, and at least one chemical reagent applied to the solid support. Each chemical reagent produces a presumptive color indication that identifies or excludes the presence of a target molecule or ion.

Abstract: Provided herein, inter alia, a portable test device, mass manufacture methods thereof, and methods of use for presumptive identification of gunshot residues and/or explosive residues. The portable test device can be a kit including a colorimetric reagent(s), a solvent(s), and a swab(s). The colorimetric reagent(s) and solvents(s) and a swab(s) can be provided in hermetically sealed light, air and moisture proof packaging.

Abstract: A sample residue collection device is provided. The sample residue collection device can include a housing, a nib, and a liquid or solvent configured for receipt within the nib. The housing can include a body, a nib housing, and an enclosure cap. The device can be configured for detection and identification of samples residues by colorimetric indications. The device can optionally include a solvent reservoir positioned within the body and containing at least a portion of the liquid or solvent. The solvent reservoir can be in fluid communication with the nib. The housing and nib with solvent may be single use or interchangeable and replaceable, providing a multiple use device. Related apparatus, systems, techniques, and articles are also described.

Abstract: A portable detection kit for identifying the presence of narcotic compounds (NCs) includes at least one chemical dye, a catalytic reagent, at least one solvent, and a least one surfactant. The at least one dry chemical dye is configured to undergo physic-chemical interaction with at least one predetermined NC to produce a color visible change. The at least one predetermined NC is selected from the group consisting of fentanyl analogues (FAs) and narcotics containing nitrogen heterocyclic moiety.

Abstract: Provided herein, inter alia, are solvent and resin formulations comprising reduced fire and environmental risk, methods for producing sensor device for detection of any analyte, e.g., by printing reactive chemicals and dyes onto a substrate using large scale printing machines. Also provided is a method of preparing the reduced risk formulations and sensor device, and methods of using the sensor device. Further provided is a sensor system including an ink and a solid support. The ink includes at least one reactive chemical or dye, a co-solvent, and a resin composition chosen for reduced fire and environmental impact risk. The ink is applied (e.g., printed) on a surface of the solid support. The reactive chemical or dye is configured to undergo a chemical reaction with gunshot residue (e.g., post blast residues associated with historical and modern day black powders used in bullet manufacture) that produces a presumptive colorimetric indication.

Abstract: Provided herein is a portable test device, mass manufacture method and method of use for identification of at least one target drug of abuse. The portable detection kit can include a catalytic reagent, a solid support carrier, and an absorbent material. The colorimetric reagent and the catalytic reagent can be are affixed to the solid support carrier to form a reaction zone thereon. The colorimetric reagent and the catalytic reagent are configured to undergo chemical reaction with at least one target drug of abuse to produce a visible color change. The at least one target drug of abuse is selected from the group consisting of nicotine, cannabinoids, amphetamines, opioids, or cocaine. A target drug of abuse can be on vaping device surfaces and/or within vaping liquid formulations.

Abstract: A portable detection kit for identifying the presence of cannabinoids is provided and includes a colorimetric dye, a catalytic reagent, a solvent, a surfactant, and a delivery device containing a solvent or solvent mixture including the solvent. The delivery device is configured to deliver a portion of the solvent or solvent mixture to a target residue to form a sample residue. The colorimetric dye is configured to undergo a chemical reaction when the sample residue contains a cannabinoid. The chemical reaction is configured to produce a visible color change that corresponds to a predetermined cannabinoid of a plurality of cannabinoids.

Abstract: A system is provided for identifying the presence of a target molecule or ion. The system comprises a solid support, and at least one chemical reagent applied to the solid support. Each chemical reagent produces a presumptive color indication that identifies or excludes the presence of a target molecule or ion.

Abstract: A system is provided for identifying the presence of a target molecule or ion. The system comprises a solid support, and at least one chemical reagent applied to the solid support. Each chemical reagent produces a presumptive color indication that identifies or excludes the presence of a target molecule or ion.

Abstract: A system is provided for identifying the presence of a target molecule or ion. The system comprises a solid support, and at least one chemical reagent applied to the solid support. Each chemical reagent produces a presumptive color indication that identifies or excludes the presence of a target molecule or ion.