Electrolytes - Siemens Rapidlab 1200 Operator's Manual

1-40

Electrolytes

The Rapidlab 1260 and 1265 systems analyze blood samples for Na
addition to pH and the blood gases. These systems also report the anion gap and a value
for calcium adjusted to pH of 7.40.
The sensors used for electrolytes are based on ion-selective electrode (ISE) technology.
Each sensor has a membrane that is highly selective for a specific ion.
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Figure 1-33
The recognition mechanism in the ISE is the membrane. Each sensor has a membrane
selective for the specific substance that it measures.
02087462 Rev. V
Rapidlab 1200 Operator's Guide: System Overview and Intended Use
Electrical contact
Electrolyte solution
Silver/silver chloride electrode
Electrolyte Sensor
+ + - ++
, K , Cl , and Ca in