BS 2690-105:1983

This standard BS 2690-105:1983 Methods of testing water used in industry is classified in these ICS categories:

• 13.060.50 Examination of water for chemical substances

Orthophosphate by formation of phosphomolybdic acid, reduction to molybdenum blue and spectrophotometric measurement. Condensated phosphates by prior hydrolysis to orthophospate. Organophosphorus compounds by prior oxidation to orthophosophate and condensed phosphates. All three methods applicable to up to 100 μg of PO₄ in up to 50 mL.