RADIOMETER ABL800 FLEX, Reference Manual

Page: 30 / 206

ABL800 FLEX Reference Manual 1. Potentiometric measuring principles
Electrolyte electrodes,
Continued
Calibration
solution values Cal 1 solution S1720 has the following nominal electrolyte concentrations:
c K
+
4.0 mmol/L
c Na
+
145 mmol/L
c Ca
2+
1.25 mmol/L
c Cl
−
102 mmol/L
Cal 2 solution S1730 has the following nominal electrolyte concentrations:
c K
+
40.0 mmol/L
c Na
+
20.0 mmol/L
c Ca
2+
5.0 mmol/L
c Cl
−
50 mmol/L
The precise concentration of each electrolyte ion is contained in the solution’s bar
codes.
Designations The following designations are used (X = K/Na/Ca/Cl):
E(X,Cal1) = Potential of the respective electrolyte electrode
chain from a calibration on Cal 1 solution
E(X,Cal2) = Potential of the respective electrolyte electrode
chain from a calibrration on Cal 2 solution
61.5 = Theoretical sensitivity of the K and Na electrodes at
37
o
C
30.75 = Theoretical sensitivity of the Ca electrode at 37
o
C
−
61.5
= Theoretical sensitivity of the Cl electrode at 37
o
C
c X (Cal1) = Concentration of the respective electrolyte ion in
Cal 1 solution
c X (Cal2) = Concentration of the respective electrolyte ion in
Cal 2 solution
E
0
(X,Cal1) = Standard potential of the respective electrolyte
electrode chain
c X (Cal1,nom) = Nominal concentration of the respective electrolyte
ion in Cal 1 solution
E(X,Cal 1,prev) = Potential of the respective electrolyte electrode chain
from the previous calibration on Cal 1 solution
Sens(X,Cal2,prev) = Sensitivity of the respective electrolyte electrode
from the last 2-point calibration
c X (Cal1,prev) Concentration of the respective electrolyte ion in
Cal 1 solution in the previous calibration
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