UNE 55-751-1985 Surface agents. Determination of arsenic in concentrated phosphates used as raw materials in detergent manufacturing. Photometric method using silver ethyl sulfide
The purpose of this standard is to establish a photometric method with silver diethyldithiocarbamate for the determination of arsenic in condensed phosphates used as raw materials for detergent formulations. The method is applicable to products whose arsenic (As) content is equal to or greater than 0.2 mg/kg.