LaMotte Dissolved Oxygen Water Quality - Manual (Page 6)

TEST PROCEDURE
PART 2 - ADDING THE REAGENTS
4
Be careful not to
introduce air into the
sample while adding
the reagents.
At this point
the sample has
For Kit Code 5860:
Add 8 drops of
*Sulfuric Acid, 1:1
(6141WT).
Cap and gently invert the bottle
to mix the contents until the
For Kit Code 7414:
Immediately use the 1.0 g
spoon (0697) to add one
level measure of *Sulfamic
Acid Powder (6286).
OR
NOTE: 2.
3.
Allow the precipitate
to settle below the
shoulder of the bottle.
5.
6. NOTE:
precipitate and the reagent
have totally dissolved. The
solution will be clear yellow
to orange if the sample
contains dissolved oxygen.
been "fixed" and contact
between the sample and the
atmosphere will not affect the
test result. Samples may be
held at this point and titrated
later.
Immediately add
8 drops of
*Manganous
Sulfate Solution
(4167)
Add 8 drops of
*Alkaline
Potassium Iodide
Azide (7166).
AND
Remove the cap
from the bottle.
1.
4.
Cap the bottle and mix
by inverting several
times. A precipitate will
form.