BS EN ISO 6878:2004

This standard BS EN ISO 6878:2004 Water quality. Determination of phosphorus. Ammonium molybdate spectrometric method is classified in these ICS categories:

• 13.060.50 Examination of water for chemical substances

This International Standard specifies methods for the determination of

• orthophosphate (see Clause 4);

• orthophosphate after solvent extraction (see Clause 5);

• hydrolysable phosphate plus orthophosphate (see Clause 6);

• total phosphorus after decomposition (see Clauses 7 and 8).

The methods are applicable to all kinds of water including seawater and effluents. Phosphorus concentrations within the range of 0,005 mg/l to 0,8 mg/l may be determined in such samples without dilution.

A solvent extraction procedure allows smaller phosphorus concentrations to be determined with a detection limit of about 0,000 5 mg/l.