LaMotte Dissolved Oxygen Water Quality - Manual (Page 7)

TEST PROCEDURE
PART 3 - THE TITRATION
5
Fill the titration
tube (0608) to the
20 mL line with the
fixed sample. Cap
the tube.
If small air bubbles appear in
the Titrator barrel, expel them
by partially filling the barrel
and pumping the titration
solution back into the reagent
container. Repeat until bubble
disappears.
NOTE:
2.
Depress plunger
of the Titrator
(0377).
Insert the Titrator
into the plug in the
top of the *Sodium
Thiosulfate, 0.025N
(4169) titrating
solution.
3.
5.
Turn the bottle
upright and remove
the Titrator.
NOTE:
If the sample is a very
pale yellow, go to Step 9.
4.
Invert the bottle and
slowly withdraw the
plunger until the
large ring on the
plunger is opposite
the zero (0) line on
the scale.
continued . . .
1.
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0