Patent ID: 6498492
Filing Date: 2002-12-24
Classification: G01N

Abstract:
A process of measuring conductivity of a solution comprising steps of:a) coupling a common electrode and an ion-sensitive sensor to an analyzer, the ion-sensitive sensor having an ion-specific electrode and a reference electrode, the ion-specific electrode being designed to provide an electrical potential based on the pH of the solution, the reference electrode being designed to be coupled to the ion-specific electrode through the solution to provide a reference electrical potential; b) applying the ion-sensitive sensor and a common electrode to the solution; and c) operating the analyzer to perform steps of: i) applying an alternating current having a peak-to-peak value, IREFâˆ’PEAK, to the reference electrode, ii) measuring a peak voltage, VIONâˆ’PEAK, between the ion-specific electrode and the common electrode, and iii) identifying the conductivity of the solution based on the relationship CSOL=IREF-PEAKVION-PEAK.