▎ 摘　　要

NOVELTY - The detector has an electrochemical detection system connected at an input end of a three-electrode electrochemical sensor. A graphene printing paper electrode is provided with a polyethylene terephthalate substrate, a counter electrode, a reference electrode, a silver conductive substrate and an insulating layer. The working electrode is located at a center of the polyethylene terephthalate substrate. Silver conductive base lines extend outwardly out of the insulating layer to form contact ends. A layer of ruthenium film is inclined on a surface of the working electrode. USE - Graphene test paper electrode based electrochemical heavy metal detector. ADVANTAGE - The detector has high detecting accuracy and practicability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a graphene test paper electrode based electrochemical heavy metal detecting method. DESCRIPTION OF DRAWING(S) - The drawing shows a front view of a graphene test paper electrode based electrochemical heavy metal detector.