Winkler titration

Winkler titration

[′viŋ·klər tī‚trā·shən]
(analytical chemistry)
A chemical method for estimating the dissolved oxygen in seawater: manganous hydroxide is added to the sample and reacts with oxygen to produce a manganese compound which in the presence of acid potassium iodide liberates an equivalent quantity of iodine that can be titrated with standard sodium thiosulfate.
References in periodicals archive ?
Despite its difficulty, Winkler titration is the gold standard for measuring oxygen levels.
But given our observations and the warning issued by the microelectrode manufacturer, critics could have legitimately questioned the validity of microelectrode data collected by other teams if they had not also conducted Winkler titrations.