ISO 3694:1977

Ammonium sulphate for industrial use — Determination of chloride ions content — Potentiometric method

Applicable to products having chloride ion contents of equal to or more than 0.0005 % (m/m). Potentiometric titration of the ions with silver nitrate solution in a nitric acid-acetone-water medium, using a silver measurement electrode and a calomel referende electrode.