Biosensor, biosensor chip and biosensor device

摘要

A biosensor includes a working electrode 101, a counter electrode 102 opposing the working electrode 101, a working electrode terminal 103 and a working electrode reference terminal 10 connected to the working electrode 101 by wires, and a counter electrode terminal 104 connected to the counter electrode 102 by a wire. By employing a structure with at least three electrodes, it is possible to assay a target substance without being influenced by the line resistance on the working electrode side.

主权项

1. A method for performing assays of a fluid using a biosensor that comprises a first electrode set including a working electrode and a counter electrode; a working electrode terminal and a first reference terminal that are connected to the working electrode; a counter electrode terminal and a second reference terminal that are connected to the counter electrode; and a second electrode set including two electrodes; wherein the second electrode set is disposed near the first electrode set; the method comprising:
connecting the biosensor to a measurement circuit; performing an assay of the fluid based on a current flowing through the working electrode terminal or the counter electrode terminal; controlling a voltage between the working electrode and the counter electrode using a voltage detected by the first reference terminal and a voltage detected by the second reference terminal; and performing another assay of the fluid based on a current flowing between the two electrodes of the second electrode set.