ISO 2751:1973
Urea for industrial use; Determination of the buffer coefficient; Potentiometric method

Standard No.

ISO 2751:1973

Release Date

1973

Published By

International Organization for Standardization (ISO)

Status

Withdraw 2002-05

Latest

ISO 2751:1973

Scope

Applicable to solutions of conventional concentration. The principle consists in measurement, at (20 0.5) 0C, of the quantity of 0.05 N acid solution required to effect a pH change from 8 to 6 for a solution containing 100 g of urea in 1000 ml of solution. For the measurement a pH meter is used fitted with a glass electrode and a calomel electrode. The method has also been approved by the IUPAC.

ISO 2751:1973 history

• 1973 ISO 2751:1973 Urea for industrial use; Determination of the buffer coefficient; Potentiometric method