What does general iron mean in practice?
The assay covers dissolved and partial forms present in the sample prepared according to the laboratory procedure.
When does it matter?
For the selection of iron removal, it is important what part of the iron is already oxidized and what happens to the sample after contact with air.
Which solutions are related to it?
The sample is taken representatively and the result is combined with pH, turbidity, manganese, ammonium and oxidation conditions.