Ink formulations for printing and manufacture of reactive chemical sensors
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.
1 . A sensor system consisting of,
a solid support; and
an ink printed on a surface of the solid support, the ink consisting of:
a reactive chemical or dye, wherein the reactive chemical or dye is selected from the group consisting of n-1 naphthyl ethylenediamine dihydrochloride, nano or powdered zinc, sulfamic acid, sulfanilamide and any combination thereof; and
a resin; and
wherein the reactive chemical or dye is configured to undergo a chemical reaction with gunshot residue that produces a presumptive colorimetric indication.
2 . The sensor system of claim 1 , wherein the ink is present on the surface of the solid support and spaced apart from any other ink.
3 . The system of claim 1 , wherein the solid support is formed from a material selected from the group consisting of glass, metal, paper, textiles, organic membranes, and inorganic membranes.
4 . The sensor system of claim 1 , wherein the resin is selected from the group consisting of cellulose, polyvinyl alcohol (PVA), or polyvinylpyrollidone (PVP).
5 . The sensor system of claim 1 , wherein the resin is PVA.
6 . The system of claim 1 , wherein the resin minimizes interaction with and degradation of the reactive chemical or dye which provide the presumptive colorimetric indication.
7 . The sensor system of claim 1 , wherein the reactive chemical or dye is n-1 naphthyl ethylenediamine dihydrochloride and a ratio of the reactive chemical or dye with the resin is 10:30.
8 . The sensor system of claim 1 , wherein the reactive chemical or dye is sulfamic acid and a ratio of the reactive chemical or dye and the resin is 6:24.
9 . The sensor system of claim 1 , wherein the reactive chemical or dye is powdered zinc and sulfanilamide, and a ratio of the reactive chemical or dye with the resin is 2.8:20.
10 . A kit comprising:
the sensor system of claim 1 ;
a swab pre-wetted with a liquid;
a container that hermetically seals the sensor system and the pre-wetted swab in respective compartments that are separated from one another.
11 . The kit of claim 10 , wherein the swab is pre-wetted with water.