Patent ID: 9291595
Filing Date: 2016-03-22
CPC Classification: G01N

Claim Text:
1. A method to monitor the concentration of metal ions or oxygen ions in a non-aqueous electrolyte, the method comprising: a first step of applying a constant potential to a working electrode put in said non-aqueous electrolyte to measure the current with respect to the constant potential; a second step of varying the constant potential between an oxidation potential and a reduction potential applied to the working electrode while maintaining the concentration of the metal ions or oxygen ions in the non-aqueous electrolyte; a third step of detecting a linear relationship between the concentration of the metal ions or oxygen ions in the non-aqueous electrolyte and the current by repeatedly performing the first step and the second step, wherein the concentration of the metal ions or oxygen ions is changed each time a combination of the first step and the second step is repeated; and a fourth step of calculating the concentration of the metal ions or oxygen ions in the non-aqueous electrolyte in pyroprocessing of the non-aqueous electrolyte by using the linear relationship; wherein a reduction potential having a constant magnitude and an oxidation potential having a constant magnitude are repeatedly applied to the working electrode in the first step and the second step.