| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and an apparatus in which a potential window can be measured precisely by a method wherein an immersion potential is measured in an uncharged state, a charging operation is performed by a prescribed voltage, an immersion potential in a completely discharged state is measured and a decomposition potential is computed on the basis of its change. SOLUTION: A positive electrode and a negative electrode which measure a decomposition- electric-charge amount and a reference electrode which is used as the reference of the electrodes are housed in a measuring cell 16. An immersion potential is measured in an uncharged state that the positive electrode and the negative electrode which are immersed in an electrolytic solution in the measuring cell 16 are short-circuited. Then, a prescribed voltage is applied across the positive electrode and the negative electrode by a power supply 26 for charging and discharge. An operation which discharges and short-circuits it is repeated. At this time, the potential of the electrodes which measure the decomposition-electric-charge amount is measured by a measuring-electrode-potential measuring part 28. On the basis of the potential, of the electrodes at an object to be measured, which is measured by the measuring-electrode-potential measuring part 28, the value of the decomposition-electric-charge amount is computed by a decomposition-electric-charge-amount computing part 30. The above operation is controlled by a control computer 32. |
