| 摘要 |
PURPOSE:To enable the simultaneous determination of the concn. of dissolved components with small-sized constitution by computing the concn. of the dissolved components in a liquid to be measured from the potential differences, etc., of plural electrodes in contact with the liquid to be measured. CONSTITUTION:This sensor is disposed with 8 pieces, etc., of the composite electrodes 6 which consists of alloys of platinum and silver of different compsn. ratios and a liquid junction part 3 of an external reference electrode 1 of a KCl/AgCl/Ag type which is disposed at the center. The electrodes 1, 6 are in contact with the liquid 8 to be measured in a container wall 7. The elution rate of silver is higher and the potential of the electrodes 6 is baser as the concn. of the silver of the electrodes 6 is higher. The combinations of the electrodes are selected according to the number of the components to be measured and the potentials of the electrodes 6 or the potential differences from the electrode 1 are measured through signal lead wires 4 running through a ceramics material 5. The concn. of the dissolved components such as oxygen, hydrogen and hydrogen peroxide in the liquid 8 is then determined by the computation based on statistics with the small-sized constitution having high temp. resistance. The adequate water quality measuring system for nuclear reactors is thus obtd. |
