LaMotte AG-103 Fresh Water Aquarium - Manual (Page 7)

DISSOLVED OXYGEN
For determining the dissolved oxygen content of water, this test kit uses
the azide modification of the Winkler Method and employs a LaMotte
Direct Reading Titrator in the final titration.
QUANTITY CONTENTS CODE
30 mL *Manganous Sulfate Solution *4167-G
30 mL *Alkaline Potassium Iodide Azide Solution *7166-G
50 g *Sulfamic Acid Powder *6286-H
60 mL *Sodium Thiosulfate Solution (0.025N) *4169-H
30 mL Starch Indicator 4170WT-G
1 Direct Reading Titrator, 0 - 10 Range 0377
1 Test Tube, 5-10-12.9-15-20-25 mL,
glass, w/cap 0608
1 Bottle, Water Sampling, 60 mL, glass 0688-DO
1 Spoon, 1.0 g 0697
*WARNING: Reagents marked with a * are considered hazardous substances.
Material Safety Data Sheets (MSDS) are supplied for these reagents. For your
safety, read label and accompanying MSDS before using.
NOTE: Read the LaMotte Direct Reading Titrator Instruction Manual
before performing the test procedure. The Titrator is calibrated in parts per
million (ppm) Dissolved Oxygen.
COL LEC TION & TREAT MENT OF THE WA TER SAM PLE
Steps 1 through 4 below describe proper sampling technique in shallow
water. For collection of sample at depths beyond arm’s reach, special water
sampling apparatus is required (e.g., the LaMotte Water Sampling
Chamber, Code 1060; Model JT-1 Water Samplers, Code 1077; or Water
Sampling Outfit, Code 3103).
1.
To avoid contamination, rinse the Water Sampling Bottle (0688-DO)
thoroughly with sample water.
2. Tightly cap the bottle. Submerge to the desired depth, and remove the
cap to allow the bottle to fill.
3. Tap the sides of the submerged bottle to dislodge any air bubbles clinging
to the inside of the bottle. Replace the cap while the bottle is still
submerged.
4. Retrieve the bottle. Examine it carefully to make sure that no air bubbles
are trapped inside of the bottle. Once a satisfactory sample has been
collected, proceed immediately with Steps 5 and 6 to “fix” the sample.
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