Parameters Determining Current; Polarization Voltage - Mettler Toledo InPro 6000 G Series Bedienungsanleitung

10.3 Parameters determining current
l = k
I = Electrode current
k = Constant
D = Coefficient of diffusion of O
a = Solubility of O
A = Cathode surface
pO = Oxygen partial pressure in the solution
2
X = Thickness of gas-permeable membrane
10.4 Polarization voltage
100
90
80
70
60
50
40
30
20
10
0
D a A
in the membrane material
2
Typical current voltage
curves in agitated
0.1 mol/l KCl
No. 1 Nitrogen
No. 2 21% Oxygen
No. 3 100% Oxygen
«A»
0.2 0.4 0.6
pO
2
x
in the membrane
2
No. 3
No. 2
No. 1
«D»
0.8 1.0 1.2
– E (Volts)