This method describes how to determine the fluoride content of drinking water photometrically with a cuvette test.
Water intended for use as an ingredient in the production of beer (brewing liquor) or other foods
Fluoride is found in almost all ground and surface waters and is normally present in concentrations < 1 mg/l.
Fluoride ions form a colorless complex with zirconium. This causes the red color of surface treatments containing zirconium to fade.