| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a residual chlorine concentration meter whose measurement accuracy is always stable regardless the passage of time compared to conventional ones. <P>SOLUTION: In the concentration meter having a working electrode 1 and a pair electrodes 2 for residual chlorine concentration measurement, a counter electrode 4 is disposed in the state of facing the working electrode 1, and when cleaning an oxide film adhering to the working electrode 1, an electric application is performed so that the working electrode 1 is put into a negative state and the counter electrode 4 is put into a positive state, and electrolysis is performed by making a current flow so that water is generated from oxygen in the oxide film formed on the surface of the working electrode 4 and hydrogen ions in a liquid to be inspected. <P>COPYRIGHT: (C)2008,JPO&INPIT |
