BS EN ISO 6878:2004

Water quality. Determination of phosphorus. Ammonium molybdate spectrometric method. | Status: Confirmed, Current

1 Scope 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.