Patent ID: 7883617

Claim:
An electrochemical analysis method comprising: arranging a working electrode and a counter electrode in an electrolyte solution to be measured, wherein the working electrode is a boron-doped electroconductive diamond electrode and the electrolyte solution to be measured contains electrolytes including element (M1), which is a low-oxidation state of element (M) and electrolytes including element (M2) which is a high-oxidation state of element (M); applying a negative potential to the working electrode so that the element (M2) is electrodeposited on a surface of the working electrode to cause an electrodeposition reaction and form an electrodeposit; maintaining the potential of the working electrode at an electrodeposition potential of the element (M1), after the step of applying the negative potential; and sweeping the potential of the working electrode toward a positive potential, after the step of maintaining the potential of the working electrode, to thereby elute the electrodeposited element (M1), while detecting electric current changes in response to potential changes to thereby analyze a substance to be measured, the substance being dissolved as the element (M) of the electrolyte in the electrolyte solution to be measured.