METHOF FOR CALIBRATING A pH DETECTOR

摘要

The proposed method for calibrating a pH detector consists in measuring electromotive force in the circuit between two electrodes that are immersed in calibration liquid and concurrently measuring the conductivity of the liquid with variable pH values. The measurement data are used for determining the calibration characteristic of the detector. As the calibration liquid, deionized water is used. The variation of the pH value is accomplished by saturating the water with carbon dioxide or by degassing the water. To plot the calibration characteristic, the measured values of the electromotive force and the calculated pH values are used. The pH values are calculated by the data on the conductivity of the calibration liquid.