Patent ID: 8177958

Claim:
An electrochemical sensor for measuring an analyte, comprising: a first working electrode, wherein the first working electrode comprises a first set of redox species, and wherein the first set of redox species comprises one or more redox species that are sensitive to said analyte; a second working electrode, wherein the second working electrode comprises a second set of redox species, and wherein the second set of redox species comprises one or more redox species that are insensitive to said analyte: a counter electrode; a reference electrode; means for applying a square wave potential sweep between a first and a second pair of electrodes, wherein the first pair of electrodes comprises the first working electrode and the reference electrode and the second pair of electrodes comprises the second working electrode and the reference electrode; and means for detecting relative shifts between a first peak and a second peak in a square wave voltammogram, wherein the first peak is produced by one of oxidation and reduction of the first set of redox species and the second peak is produced by one of oxidation and reduction of the second set of redox species.