International Organization for Standardization (ISO)
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ISO 5813:1983
Scope
Specifies the so-called Winkler procedure modified in order to make allowance for certain interferences. It is the reference procedure and applicable to all types of water having concentrations greater than 0,2 mg/l, up to double saturation, which are free from interfering substances.
ISO 5813:1983 history
1983ISO 5813:1983 Water quality; Determination of dissolved oxygen; Iodometric method