ISO 3360:1976
Phosphoric acid and sodium phosphates for industrial use (including foodstuffs); Determination of fluorine content; Alizarin complexone and lanthanum nitrate photometric method
- Standard No.
- ISO 3360:1976
- Release Date
- 1976
- Published By
- International Organization for Standardization (ISO)
- Latest
- ISO 3360:1976
- Scope
- Applicable to products the F content of which is equal to or more than 0.5 mg/kg. Specifies the separation of the element from a test portion by steam distillation in a phosphoric acid medium. Formation of a blue-coloured complex with a combined reagent alizarin complexone/lanthanum nitrate in a buffered medium at the pH of 4.6. Addition of acetone to increase the stability of the complex and the sensitivity. Photometric measurement of the complex at a wavelength of about 600 nm.
ISO 3360:1976 history
- 1976 ISO 3360:1976 Phosphoric acid and sodium phosphates for industrial use (including foodstuffs); Determination of fluorine content; Alizarin complexone and lanthanum nitrate photometric method
