Roche Diagnostics
Instructions for Use · Version 10.0 63
9180 Electrolyte Analyzer 4 Theoretical foundation
Electrode specifications
Reference electrode
The reference electrode completes the electrical circuit between the reference
electrolyte and electrical ground. This is accomplished by a cotton wool (saturated
with reference electrolyte)- calomel (Hg
2
Cl
2
)- mercury (Hg)-platinum wire-
connecting pin junction (see Figure 4-9 Reference electrode (p. 64))
Figure 4-9 Reference electrode
Use and care
Reference electrodes are manufactured for use in 9180 Electrolyte Analyzers.
Proper care should be used in handling and storage of the reference electrode. Never
use strong or abrasive cleaners such as alcohol or amphyl on the electrode.
Store the reference electrode in the transport housing provided with the electrode at
the time of purchase. Make sure that the transport housing is filled with reference
electrolyte solution (you may use the reference electrolyte solution remaining in the
reference electrode housing at the time of disassembly).
q
Do not rinse the reference electrode with distilled water. Do not allow the reference
electrode to become dry.
Calibration procedure
ISE calibration
The 9180 Electrolyte Analyzer uses a patented, novel approach for the simultaneous
calibration of Na
+
, K
+
, Ca
2+
and Cl
-
sensors, using only two aqueous base solutions.
A Platinum wire E Calomel (Hg
2
Cl
2
)
B Cable housing F Mercury (Hg)
C Glass tube G Serial number
D Cotton wool
G D
A B C
F E
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