Device for monitoring algal toxin-LR in water body online

The utility model provides a device for monitoring algal toxin-LR in a water body online and belongs to the technical field of environment detection. The device comprises an anode chamber and a cathode chamber, wherein the anode chamber and the cathode chamber are separated through a proton exchange membrane; an external resistor is arranged between an anode and a cathode; the anode and the cathode are communicated through a lead wire; a paperless recorder is connected with the external resistor in parallel, and is used for monitoring a current/voltage of the external resistor; the paperless recorder is connected with a computer; the cathode is prepared from gold, or copper or titanium plated with the gold on the surface; an algal toxin-LR aptamer is fixedly arranged on the gold surface. The device provided by the utility model has the advantages of simple structure, convenience in operation, low detection limit, good selectivity, high stability and low energy consumption, and is applicable to real-time onlin