Lucille Harries carrying out Chemical Oxygen Demand analysis (COD analysis) using the closed tube technique
Lucille Harries carrying out Chemical Oxygen Demand analysis (COD analysis) using the closed tube technique. Orange dichromate ions oxidise organic compounds. Chromium(VI) ions are reduced to green chromium(III) ions. This is a REDOX reaction in which both reduction and oxidation simultaneously occur. The COD units of reporting is milligrams oxygen per litre, mg O2/l.
Transition metal ions such as iron(II) if present will undergo oxidation, contributing to the COD value, however they are normally present in insignificant amounts.
Links informing about COD analysis:
www.palintest.com/media/uploads/137.pdf
www.palintest.com/media/uploads/136.pdf
www.hannainst.com.au/Pro/what_is_cod.htm
en.wikipedia.org/wiki/Chemical_oxygen_demand
www.sigmaaldrich.com/analytical-chromatography/analytical...
www.hannainst.com/literature/litCOD.pdf
faculty.kfupm.edu.sa/CE/abukhari/CE370-Lab/COD%20Experime...
www.environment-agency.gov.uk/static/documents/Research/C...
Lucille Harries carrying out Chemical Oxygen Demand analysis (COD analysis) using the closed tube technique
Lucille Harries carrying out Chemical Oxygen Demand analysis (COD analysis) using the closed tube technique. Orange dichromate ions oxidise organic compounds. Chromium(VI) ions are reduced to green chromium(III) ions. This is a REDOX reaction in which both reduction and oxidation simultaneously occur. The COD units of reporting is milligrams oxygen per litre, mg O2/l.
Transition metal ions such as iron(II) if present will undergo oxidation, contributing to the COD value, however they are normally present in insignificant amounts.
Links informing about COD analysis:
www.palintest.com/media/uploads/137.pdf
www.palintest.com/media/uploads/136.pdf
www.hannainst.com.au/Pro/what_is_cod.htm
en.wikipedia.org/wiki/Chemical_oxygen_demand
www.sigmaaldrich.com/analytical-chromatography/analytical...
www.hannainst.com/literature/litCOD.pdf
faculty.kfupm.edu.sa/CE/abukhari/CE370-Lab/COD%20Experime...
www.environment-agency.gov.uk/static/documents/Research/C...