ISO 5374:1978

Condensed phosphates for industrial use (including foodstuffs) — Determination of chloride content — Potentiometric method

Applicable to products having contents expressed in chlorine equal to or more than 30 mg/kg. Potentiometric titration of the chloride ions with standard volumetric silver nitrate solution in a nitric acid-acetone-water medium, at a temperature below 20 0C, using a silver measurement electrode and a colomel reference electrode or a pair of silver-mercury(I) sulphate electrodes. Has also been approved by the IUPAC.