ISO 3360:1976

Phosphoric acid and sodium phosphates for industrial use (including foodstuffs) — Determination of fluorine content — Alizarin complexone and lanthanum nitrate photometric method

Publication date: 1 gush 1976

General information

Current stage: 90.93 Effective date: 29 nën 2023

Originator: ISO

Owner: ISO/TC 47

Type: International Standard

ICS: 67.220.20 71.060.30 71.060.50

Gjuha: frëngjisht anglisht

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Statusi: Publikuar

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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.

Life cycle

NOW

PUBLISHED
ISO 3360:1976
90.93 Standard confirmed
29 nën 2023