Method for measuring chemical oxygen demand in high-chlorine wastewater

The invention relates to a method for measuring COD of high-chlorine wastewater by utilizing a TOC analyzer, which comprises the following steps of: 1, drawing a standard curve by taking potassium hydrogen phthalate as a reference reagent and adopting a non-dispersive infrared detection method; 2, cleaning a microsyringe of the TOC analyzer with a high-chlorine wastewater sample; 3, taking a high-chlorine wastewater sample by using a microsyringe, carrying out high-temperature catalytic combustion, and detecting the amount of generated CO2; and 4, calculating the COD value of the high-chlorine wastewater sample according to the standard curve. Serious interference of chloride ions on a detection result can be eliminated, the measurement result is close to a theoretical value, and the accuracy is high; the temperature in the high-temperature combustion tube is uniform by controlling the sample injection amount and temperature, so that chloride salts in a sample are prevented from being gasified to block the co