Portable detection and quantification method for delta 9 THC

A device for quantification of delta-9-tetrahydrocannabinol (Δ-9 THC) in a sample, the device comprising:

• a light source for providing a light with a wave-length range of 550-625 nm;
• a sample holder made from a material that can allow the light to pass;
• a testing solution;
• a heating element for applying heat to a reaction mixture;
• a reference element as a standard;
• a light filter allowing a light with wavelength range of 550-625 nm to pass, the light filter comprising a grating, prism, and/or made from a polymer and/or a transparent resin;
• a photodiode detector;
• and
• a printed card with color bars or colored numbers, a cellular phone app that can measure color differences, or a turbidity meter;
• wherein a reaction mixture is generated by adding the sample and a testing solution into the sample holder;
• wherein the light is shone through the testing solution containing the sample and through the standard, and through the light filter;
• wherein both optical paths, the sample and the standard, are sealed from each other so that there is no light bleed between the two;
• wherein the standard is made from general purpose polystyrene (GPPS) with a combination of solvent violet 13 and solvent violet 38;
• wherein a chromophore is produced in the reaction mixture, wherein the heating element can be used to speed up the complete production of the chromophore;
• wherein the photodiode detector measures the absorption of the chromophore.