ISO 1917:1972
Hydrated sodium perborates for industrial use; determination of sodium oxide, boric oxide and available oxygen contents; volumetric methods
- Standard No.
- ISO 1917:1972
- Release Date
- 1972
- Published By
- International Organization for Standardization (ISO)
- Status
- 2002-05
- Latest
- ISO 1917:1972
- Scope
- Determination of the sodium oxide content by addition of an excess of a solution of hydrochloric acid and back titration with a standard volumetric solution of sodium hydroxide in presence of methyl red/bromocresol green as indicator. Subsequent titration of the boric oxide with the standard volumetric solution of sodium hydroxide in the presence of mannitol or sorbitol, using phenolphthalein as indicator. Determination of the available oxygen content in a test portion by titration in acid solution with a standard volumetric potassium permanganate solution. The equation for the reaction involved in the determination of available oxygen is given.
ISO 1917:1972 history
- 1972 ISO 1917:1972 Hydrated sodium perborates for industrial use; determination of sodium oxide, boric oxide and available oxygen contents; volumetric methods
