Patent ID: 11959870
Assignee: HACH COMPANY
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 10:
11. A device for measuring an analyte of a sample, comprising:
a measurement electrode and a ground electrode contacting the sample;
a low-slope reference electrode, in a reference electrode assembly, having a sensitivity to an analyte of less than about 55 mV/decade, wherein the electrolyte solution is in contact with the low-slope reference electrode, wherein the electrolyte solution is electrically coupled to the sample via at least one junction, wherein the low-slope reference electrode comprises an ion selective electrode for a particular ion in a solution comprising the particular ion;
a processor;
a memory device that stores instructions executable by the processor to:
measure a first potential between the measurement electrode and the ground electrode;
measure a second potential between the low-slope reference electrode and the ground electrode;
determine the analyte in the sample by comparing the first potential and the second potential, wherein the comparing represents a hydrogen ion activity in the sample.