Dissolve Oxygen Lab Report
Winkler Method for Dissolve Oxygen
I. INTRODUCTION
They are two ways of determining dissolve oxygen in water the titrimetric by Winkler and electrometric. Winkler method is a technique used to measure dissolved oxygen in freshwater systems. Dissolved oxygen is used as an indicator of the health of a water body, where higher dissolved oxygen concentrations are correlated with high productivity and little pollution. This test is performed on-site, as delays between sample collection and testing may result in an alteration in oxygen content. The process includes divalent manganese salt precipitation by strong alkali to divalent manganese hydroxide. Next is the addition of potassium iodide or potassium hydroxide to create a pinkish brown precipitate.
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