Reference number
ISO 2749:1973
ISO 2749:1973
© ISO 2024
ISO 2749:1973
Urea for industrial use — Measurement of the pH of a solution of urea of conventional concentration (100 g/l) — Potentiometric method
Edition 1
1973-11
1973-11
Retirada
Resumen
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.