| 摘要 |
PURPOSE:To diminish the deterioration by the contamination of an electrode part and to make a continous operation possible and also, to decrease a moving part, by carrying out corrections basing on pH value putting ammonia in a gas- liquid equilibrium state. CONSTITUTION:A prescribed quantity of an alkali agent AL is mixed with a water to be measured SA in a pH control vessel 1 and pH value is controlled. Said pH value is measured in a pH measuring vessel 5 and its measured result is sent to an operator 6. Ammonia vaporized in the vessel 5 is heated by a heater HE and is supplied to an ammonia measuring vessel 2. Concentration of the ammonia is measured by a measuring electrode EL in the vessel 2 and measured result is sent to the operator 6 and also, the temperature information measured by a thermometer TE and pressure information measured by a pressure guage PR, are sent to the operator 6. The concentration of the ammonia corrected basing on these data is found by the operator 6 and is sent to an indicator 4 through an oscillator 3. Deterioration by the contamination of an electrode part is prevented by measuring by vaporizing the ammonia and also, moving part such as an electromagnetic valve is decreased. |
