Method for detecting chemical oxygen demand of water quality of mine production wastewater

The invention discloses a water quality chemical oxygen demand detection method for mine production wastewater, and relates to the technical field of water quality chemical oxygen demand detection. The method comprises the following steps: putting a to-be-detected water sample or a standard solution into a digestion tube, and sequentially adding a mercury sulfate solution, a potassium dichromate standard solution and a silver sulfate-sulfuric acid solution; covering the digestion tube, and putting the digestion tube into microwave digestion equipment; setting three-stage heating, keeping the temperature at 100-120 DEG C for 5 minutes, keeping the temperature at 130-150 DEG C for 5 minutes, keeping the temperature at 160-170 DEG C for 10 minutes, and naturally cooling after the heating is finished; fixing the volume of the solution in the digestion tube in a volumetric flask, uniformly shaking, standing, precipitating and filtering; and establishing a standard curve by utilizing a standard solution under set p