14
A chloride electrode may be used as an indicator to follow
the progress of a chloride tiration with silver nitrate. The
electrode can be used in colored samples where other
indicators suffer from interferences. During the titration the
sensor follows the decrease in chloride concentration while
small additions of silver nitate titrant are added. The silver
reacts with the chloride ions forming a precipitate of silver
chloride. At the stoichiometric end point, a large change in
mV occurs. Measurements may be automated by use of
the Hanna Titrator HI 901 or titrated manually.
XIII.
XIII.
XIII.
XIII.
XIII.pH
pH
pH
pH
pH
The HI 4107 and HI 4007 electrodes may be used in
solutions with pH values between 2 and 11. Samples that
fall beyond this range should be adjusted with acetate pH
buffer. See Section VI.
Titration
Titration
Titration
Titration
Titration
XIV. S
XIV. S
XIV. S
XIV. S
XIV. Storage and Care of the HI 4007 and
torage and Care of the HI 4007 and
torage and Care of the HI 4007 and
torage and Care of the HI 4007 and
torage and Care of the HI 4007 and
HI 4107 sensors
HI 4107 sensors
HI 4107 sensors
HI 4107 sensors
HI 4107 sensors
The HI 4007 sensor can be stored in very dilute standards
(<10
-4
M) for short periods of time and should be stored
dry with the protective cap on when not in use.
The model HI 4107 combination electrode can be left in
dilute standards (<10
-4
M) for short time periods.
For long term storage, the electrode should be drained and
washed of salts with distilled ot deionized water. Unscrew
the upper cap and move outer sleeve up cable. Wrap the
ceramic junction on the inner stem with Parafilm
®
or
other sealing wrap. Place the protective cap provided over
the sensor membrane. Store dry disassembled electrode in
storage box provided with electrode.
