Experimental system for detecting COD of water body based on ozone chemiluminescence method

The invention provides an experimental system for detecting COD of a water body based on an ozone chemiluminescence method, which belongs to the field of sewage treatment. The system comprises a micro-fluidic chip, an ozone preparation unit, a liquid sample introduction unit and a data acquisition unit. The ozone preparation unit comprises an ozone generator, an oxygen bottle, a primary pressure reducing valve, a precise air pressure regulator and a precise digital pressure gauge; the liquid sample introduction unit comprises a micro-injection pump and a standard injector; and the data acquisition unit comprises a photomultiplier, a data acquisition card and a computer. Ozone generated by the ozone preparation unit and a glucose solution in the liquid sample introduction unit enter the micro-fluidic chip through a pipeline and are subjected to chemiluminescence reaction in the micro-fluidic chip, and weak light generated in the reaction process is acquired by a photomultiplier in the data acquisition unit, co