International Standard
ISO 2367:1972
Cryolite (natural and artificial) — Determination of aluminium content — 8- Hydroxyquinoline gravimetric method
Reference number
ISO 2367:1972
ISO 2367:1972
Edition 1
1972-12
1972-12
© ISO 2024
International Standard
p
ISO 2367:1972
7206
Published
(Edition 1, 1972)
This standard was last reviewed and confirmed in 2022.
Therefore this version remains current.
Abstract
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.
General information
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Status: PublishedPublication date: 1972-12Stage: International Standard confirmed [90.93]
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Edition: 1Number of pages: 3
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Technical Committee :ISO/TC 226ICS :71.060.50
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