Measured parameters

Analytical Methods

Comments on methods

pH and temperature

Electrochemical glass electrode (NF T 90-008)

In situ measurement using HANNA brand pH-meter

Total Kjeldahl Nitrogen (TKN)

Method after selenium mineralization (NF T 90-010)

Digestion of 50 ml of sample and determination by titrimetry after distillation.

Chemical Oxygen Demand (COD)

Potassium dichromate oxidizability method (NF T 90-101)

Oxidation by excess dichromate in an acidic medium followed by a dosage of the excess dichromate by the mixed iron and ammonium sulfate.