Rapidlab 1200 Operator’s Guide: System Overview and Intended Use 1-41
02087462 Rev. V
The potassium sensor membrane is designed as a charge separator. The positively
charged potassium ions selectively interact with the membrane when the sample
interfaces with the membrane. The negatively charged chloride ions do not
interact with the membrane. The charge separation causes the membrane potential
measured by the electrochemical cell.
Figure 1-34 Illustrated Electrolyte Sensor
1 Internal electrolyte solution
2 Membrane
3 Electrolyte solution
4 Randomly oriented ions
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