ISO 2749:1973Withdrawn

Urea for industrial use — Measurement of the pH of a solution of urea of conventional concentration (100 g/l) — Potentiometric method

Urée à usage industriel — Mesurage du pH d'une solution d'urée à concentration conventionnelle de 100 g/l — Méthode potentiométrique

Abstract / scope

Describes the measurement of a solution of a test sample by means of a pH meter fitted with one glass electrode and one calomel electrode. The pH meter has a sensitivity of 0.05 pH units. The calibration of the pH meter is carried out at (20 0.5) 0C by means of buffer solutions. The method has also been approved by the IUPAC.