▎ 摘　　要

NOVELTY - The utility model claims a test paper for graphene electrode and its establishment based on electrochemistry heavy metal detection instrument, the graphene paper printed electrode comprises PET substrate and which is printed by a printing process of working electrode, counter electrode and reference electrode. silver conductive line and an insulating layer; the working electrode is printing the graphene, the pair of electrodes are printed carbon, said reference electrode is printed silver/silver chloride, based on electrochemistry heavy metal detection instrument, comprising a tri-electrode electrochemical sensor electrochemical detection system and its input end is connected, the three-electrode electrochemical sensor adopts the graphite printing paper electrode; this utility model adopts graphite printing paper electrode and matching content of the heavy metal ion electrochemical analysis system testing lake samples, 10 were test recovery rate is 92.5%. RSD is less than 5%, the test time is less than 15, the detection limit is less than 1 mol/L, with the atomic absorption method comparing relative deviation less than 5%, so the graphene paper electrode and electrochemical analyzer of the utility model has high accuracy and practicability.