Siemens Rapidlab 1200 - Electrolytes

1-40 Rapidlab 1200 Operator’s Guide: System Overview and Intended Use
02087462 Rev. V
Electrolytes
The Rapidlab 1260 and 1265 systems analyze blood samples for Na
+
, K
+
, Cl
-
, and Ca
++
in
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.
Figure 1-33 Electrolyte Sensor
The recognition mechanism in the ISE is the membrane. Each sensor has a membrane
selective for the specific substance that it measures.
1 Electrical contact
2 Electrolyte solution
3 Silver/silver chloride electrode