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ISO 2998:1974Withdrawn

Sodium tripolyphosphate and sodium pyrophosphate for industrial use — Determination of orthophosphate content — Photometric method using the reduced molybdophosphate

Tripolyphosphate et pyrophosphate de sodium à usage industriel — Dosage de l'orthophosphate — Méthode photométrique au molybdophosphate réduit

Abstract / scope

Specifies a photometric method, using the reduced molybdophosphate, for the determination of orthophosphate content of sodium tripolyphosphate and sodium pyrophosphate for industrial use. Applicable to products with orthophosphate contents between 0,05 and 1,0 % (m/m).