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The Determination of Chemical Oxygen Demand in Waters …

ENVIRONMENT AGENCYThe Determination of Chemical Oxygen demandin Waters and effluents (2007)Methods for the Examination of Waters and Associated MaterialsThis document was archived on 12/11 document was archived on 12/11/2018. The Determination of Chemical Oxygen Demand in Waters and effluents (2007) Methods for the Examination of Waters and Associated Materials This booklet contains guidance on methods for the Determination of Chemical Oxygen Demand using potassium dichromate solution, and notes for the disposal and recovery of selected reagents. This document revises the document published in 1986. Five methods are described and these include: A A reference large scale (10 ml) flask digestion procedure with mercury suppression. B A small scale (2 ml) flask digestion procedure with mercury suppression and spectrophotometric Determination .

A A reference large scale (10 ml) flask digestion procedure with mercury suppression. B A small scale (2 ml) flask digestion procedure with mercury suppression and spectrophotometric determination. C A mercury-free large scale (10 ml) flask digestion procedure using chromium(III) potassium sulphate and silver nitrate solutions.

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