Agriculture Reference
In-Depth Information
To pH meter
Measuring
electrode
Reference
site
Saturated KCl AgCl
solution*
Reference
capillary
H
+
sensitive glass
bulb
Figure 5.4.
Typical setup for a combination pH electrode. Note that the saturated KCl/AgCl solu-
tion can be different depending on the electrode manufacturer.
proton
sensing
bulb
D
C
B
A
Figure 5.5.
A combination pH electrode is shown (
A
). The dark-colored tip is the pH sensing
glass electrode. The reference electrode is not visible. A reference electrode (
B
) for ISE mea-
surement along with a nitrate-selective electrode (
C
) are also shown. Electrode
D
is used for mea-
suring salt content in aqueous solutions.
