lecture 23 potentiometry, ion-selective electrodes. reading: ch....
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Lecture 23Potentiometry, Ion-Selective Electrodes.
Reading: Ch. 14
Outline
1. Potentiometry (15-1)
2. Reference Electrode (15-1)
3. How ion-selective electrodes work (15-4)
4. Glass pH-electrode (15-5)
Junction potential
+ _
How do ion-selective electrodes work?
distance
activ
ity o
r co
ncen
trat
ion
[ ]pb,Na
potHNapb,H
0 aaln ++ ++= KF
RTEEPB
Nikolsky equation:
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