Ссылочный номер
ISO 2751:1973
ISO 2751:1973
Urea for industrial use — Determination of the buffer coefficient — Potentiometric method
Версия 1
1973-11
В время отменен
ISO 2751:1973
7731
Отозвано (Версия 1, 1973)

Тезис

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.

Общая информация

  •  : Отозвано
     : 1973-11
    : Отмена международного стандарта [95.99]
  •  : 1
  • ISO/TC 47
    71.080.30 
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