LaMotte WATER SAMPLER – FLUSHING STYLE 1060 - Manual (Page 3)

B. COLLECTING A DISSOLVED OXYGEN WATER SAMPLE
The dissolved oxygen test is performed with reagents furnished in
LaMotte’s Dissolved Oxygen Kits, Code 7414 or 5860.
*WARNING: Reagents marked with an * are considered to be potential health
hazards. To view or print a Material Safety Data Sheet (MSDS) for these
reagents go to www.lamotte.com. To obtain a printed copy, contact LaMotte by
e-mail, phone or fax.
1. Remove the rod with stopper from the test tube.
2. To the sample, add 8 drops of *Manganous Sulfate Solution (4167)
and 8 drops of *Alkaline Potassium Iodide Azide (7166).
3. Stopper the tube and gently mix by inverting.
4. Allow the test tube to stand undisturbed until the precipitate settles
two inches below the top of the tube.
5. Use a 1.0 g spoon (0697) to add one measure of *Sulfamic Acid
Powder (6286), or add 8 drops of *Sulfuric Acid, 1:1 (6141WT). Cap
the test tube and mix until the precipitate has completely dissolved.
Contact of the water sample with air will not affect it now. By following
instructions provided with the Dissolved Oxygen Kit, the “fixed” sample
may either be titrated in the field or returned to the laboratory for final
titration.
C. TAKING SOUNDINGS WITH THE GRADUATED LINE
The two pound weight can be used for taking soundings. Attach the
weight to the graduated line by the snap clamp and lower it into the water.
Measure the depth at which the sounding lead strikes the bottom. The
line is graduated in meters with every fifty meters marked by a plastic
band.