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DISSOLVED OXYGEN
WINKLER COLORIMETRIC METHOD • CODE 3688-SC
QUANTITY
CONTENTS
30 mL
*Manganese Sulfate Solution
30 mL
*Alkaline Potassium Iodide Azide
30 mL
*Sulfuric Acid 1:1
1
Sample Tube, screw cap
1
Cap
*WARNING: Reagents marked with an * are considered to be potential health hazards.
To view or print a Safety Data Sheet (SDS) for these reagents go to www.lamotte.com.
Search for the four digit reagent code number listed on the reagent label, in the
contents list or in the test procedures. Omit any letter that follows or precedes the
four digit code number. For example, if the code is 4450WT-H, search 4450. To obtain
a printed copy, contact LaMotte by email, phone or fax.
Emergency information for all LaMotte reagents is available from Chem-Tel:
(US, 1-800-255-3924) (International, call collect, 813-248-0585).
Dissolved oxygen is vital to the survival of aquatic organisms. Naturally present,
dissolved oxygen enters the water when plants photosynthesize. Wind and wave action
also cause oxygen from the air to dissolve into water. Dissolved oxygen is consumed
by aquatic animals and by the oxidation, or chemical breakdown, of dead and decaying
plants and animals. The concentration of dissolved oxygen in natural waters can range
from 0 to 14 ppm and is eff ected by temperature and salinity.
APPLICATION:
RANGE:
MDL:
METHOD:
INTERFERENCES:
COD3 Plus Colorimeter 10.16
This method is applicable for the determination of dissolved
oxygen in drinking water, all surface waters and wastewater.
0.0–11.0 Dissolved Oxygen
0.6 ppm
This method uses the azide modifi cation of the Winkler
Method with a colorimetric determination of the yellow iodine
produced from the reaction with the dissolved oxygen.
The presence of other oxidizing agents may cause positive
interferences. Reducing may cause negative interferences.
Nitrite interferences are eliminated with the azide
modifi cation.
CODE
*4167-G
*7166-G
*6141WT-G
29180
28570
Dissolved Oxygen
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