ISO 2367:1972

Cryolite (natural and artificial) — Determination of aluminium content — 8- Hydroxyquinoline gravimetric method

Publication date: Dec 1, 1972

General information

Current stage: 90.93 Effective date: Nov 15, 2022

Originator: ISO

Owner: ISO/TC 226

Type: International Standard

ICS: 71.060.50

Languages: French English

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Status: Published

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Scope

The method can be applied provided the Fe203 content does not exceed 0,15 . It can also be applied to products with molar ratio of NaF to AlF3 between approximately 3 and 1,7. The principle consists in dissolution of a test portion by acid fusion using potassium pyrosulphate and recovery by hydrochloric acid. Separation of the mixture by precipitation of aluminium, with ammonium benzoate , in an acetic reducing medium. Dissolution of the precipitate and reprecipitation as aluminium tri(quinolin-8-oxide) in an acetic buffer medium. Filtration, washing, drying of the precipitate at a temperature of 130 °C and weighing.

Life cycle

NOW

PUBLISHED
ISO 2367:1972
90.93 Standard confirmed
Nov 15, 2022

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