ELECTROCHEMICAL MEASUREMENT INSTRUMENT AND ELECTROCHEMICAL MEASUREMENT METHOD

To perform electrochemical measurements under more diverse measurement conditions.SOLUTION: An electrochemical measurement instrument is available for the three-electrode method of measuring by changing the potential difference between a working electrode and a counter electrode with a reference electrode as the reference potential. The electrochemical measurement instrument includes a first holding part that accommodates a first solution, which is an electrolyte solution containing a substance to be measured, and a second holding part that accommodates a second solution, which is an electrolyte solution with a lower concentration of the substance than the first solution. A first working electrode and a first counter electrode are immersed in the first solution, the reference electrode is immersed in the second solution, and the reference electrode and the first counter electrode are electrically connected so as to have the same potential.SELECTED DRAWING: Figure 1 【課題】より多様な測定条件の下で電気化学測定を実行すること。【解決手段】参照電極を基準電位にして、作用電極と対極との間の電位差を変化させることにより測定する三電極法に利用可能な電気化学測定装置であって、測定対象の物質を含む電解質溶液である第１溶液を保持する第１保持部と、前記物質の濃度が前記第１溶液よりも低い電解質溶液である第２溶液を保持する第２保持部と、を備える。前記第１溶液に第１作用電極および第１対極が浸漬され、前記第２溶液に前記参照電極が浸漬され、前記参照電極と前記第１対極とが同電位となるように電気的に接続される。【選択図】図１