ISO 2124:1972
Sodium and potassium silicates for industrial use; Determination of silica content; Titrimetric method
- Standard No.
- ISO 2124:1972
- Release Date
- 1972
- Published By
- International Organization for Standardization (ISO)
- Status
- 2002-05
- Latest
- ISO 2124:1972
- Scope
- The principle consists in neutralization of the alkalinity of a test portion, previously dissolved, in presence of methyl red as indicator. Addition of sodium fluoride, which reacts with the silicic acid, forming a euaivalent quantity of sodium hydroxide. Addition of a measured volume of standard volumetric hydrochloric acid solution in excess, followed for diluting by ethanol. Filtration of the silicic compound thus obtained, which is insoluble under these conditions. Titration of the excess of hydrochloric acid in the filtrate with standard volumetric sodium hydroxide solution in presence of methyl red as indicator.
ISO 2124:1972 history
- 1972 ISO 2124:1972 Sodium and potassium silicates for industrial use; Determination of silica content; Titrimetric method
