Graphene three-electrode coplanar standard electrode

The utility model provides a graphene three-electrode coplanar standard electrode, which is characterized in that three electrodes which are mutually coplanar are fixedly arranged on an electrode substrate and are sequentially a first electrode, a second electrode and a third electrode from left to right. The first electrode comprises a first pin (1), a first guide part (4) and a first detection layer (7), the second electrode comprises a second pin (2) and a second guide part (5), and the third electrode comprises a third pin (3), a third guide part (6) and a second detection layer (8). Holes are dug in the electrode substrate to form electrode modification holes (9), the electrode modification holes (9) are formed over the second electrode, and the middle end of the second guide part (5) is provided with a conduction hole (10). A back electrode is arranged on the back of the electrode substrate and specifically comprises a back pin (11), a back guide part (12) and an electrode modification ring (13), the ba