| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a pH-measuring device capable of accurately determining the pH value of a liquid to be inspected, by preventing the influence of temperature difference of replaced liquid to be inspected and influence due to leakage of potassium chloride solution from salt bridge. <P>SOLUTION: The heat capacity of a pH standard liquid storage cell 11 is set equal to that of liquid to be inspected storage cell 21, the heat capacity of a primary-side communication section 12 is set equal to that of a secondary-side communication section 22; and the potential difference between two cells 11b and 11c for primary-side measurement, measured by primary-side measuring electrodes 4a and 4b, is used for correcting the pH value of the liquid Q to be inspected. <P>COPYRIGHT: (C)2008,JPO&INPIT |
