ISO 3360:1976
ISO 3360:1976

Status : Published (Under review)

This standard was last reviewed and confirmed in 2023. Therefore this version remains current.
Format Language
std 1 42 PDF
std 2 42 Paper
  • CHF42
Convert Swiss francs (CHF) to your currency


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.

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