Determination of Dissolved Oxygen
in Water by Titrimetric Method
(Winkler
method)
INTRODUCTION
The term Dissolved
Oxygen is used to describe the amount of oxygen dissolved in a unit volume of
water. It is a measure of the ability of water to sustain aquatic life. Dissolved oxygen
(DO) is essential for the maintenance of healthy lakes and rivers. Any
reduction in the amount of oxygen in a body of water, caused by a rise in
temperature or by pollution, may mean that certain animals can no longer live
there. The concentration of dissolved oxygen can therefore be taken as a
measure of the ability of water to support living things. lf the oxygen
concentration is less than half the maximum concentration then the water is of
poor quality.........
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