LaMotte Dissolved Oxygen Water Quality Test Kit - Manual (Page 13)

13
DISSOLVED OXYGEN TEST PROCEDURE
Part 3 - The Titration
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1. 2.
3. 4.
5.
NOTE: If small air bubbles appear in the titrator barrel, expel them by
partially fi lling the barrel and pumping the titration solution back into the
reagent container. Repeat until bubble disappears.
Fill the titration tube
(0608) to the 20 mL line
with the fi xed sample.
Cap the tube.
Depress plunger of
the Titrator (0377).
Insert the Titrator into
the plug in the top of the
*Sodium Thiosulfate,
0.025N (4169) titrating
solution.
Invert the bottle and
slowly withdraw the
plunger until the large
ring on the plunger is
opposite the zero (0)
line on the scale.
Turn the bottle
upright and remove
the Titrator. NOTE: If the sample
is a very pale yellow,
go to Step 9.
continued . . .