Cryolite, natural and artificial Conventional test for evaluation of free fluorides content

Available format(s)

Hardcopy , PDF 1 User , PDF 3 Users , PDF 5 Users , PDF 9 Users

Language(s)

English

Published date

21-10-2009

Publisher

International Organization for Standardization

ISO/TR 4277:2009 describes a conventional test for the evaluation of the free fluorides content of natural, artificial and recovered cryolite.

This method is applicable to products having free fluorides content greater than 0,15 % (mass fraction) of AIF₃ or 0,4 % (mass fraction) of NaF.

DocumentType	Technical Report
Pages	6
PublisherName	International Organization for Standardization
Status	Current

Standards	Relationship
PD ISO/TR 4277:2009	Identical
NEN NPR ISO/TR 4277 : 2009	Identical

ISO 1693:1976	Cryolite, natural and artificial Determination of fluorine content Modified Willard-Winter method
ISO 3393:1976	Cryolite, natural and artificial, and aluminium fluoride for industrial use — Determination of moisture content — Gravimetric method
ISO 2367:1972	Cryolite (natural and artificial) — Determination of aluminium content — 8- Hydroxyquinoline gravimetric method
ISO 3699:1976	Anhydrous hydrogen fluoride for industrial use — Determination of water content — Karl Fischer method
ISO 2366:1974	Cryolite, natural and artificial — Determination of sodium content — Flame emission and atomic absorption spectrophotometric methods
ISO 2830:1973	Cryolite, natural and artificial — Determination of aluminium content — Atomic absorption method
ISO 3391:1976	Cryolite, natural and artificial — Determination of calcium content — Flame atomic absorption method
ISO 3392:1976	Cryolite, natural and artificial, and aluminium fluoride for industrial use — Determination of water content — Electrometric method
ISO 3429:1976	Sodium fluoride primarily used for the production of aluminium — Determination of iron content — 1,10- Phenanthroline photometric method
ISO 3566:1976	Sodium fluoride primarily used for the production of aluminium — Determination of chlorides content — Turbidimetric method
ISO 1619:1976	Cryolite, natural and artificial — Preparation and storage of test samples
ISO 6374:1981	Cryolite, natural and artificial, and aluminium fluoride for industrial use — Determination of phosphorus content — Atomic absorption spectrometric method after extraction
ISO 3430:1976	Sodium fluoride primarily used for the production of aluminium — Determination of silica content — Reduced molybdosilicate spectrophotometric method
ISO 5938:1979	Cryolite, natural and artificial, and aluminium fluoride for industrial use — Determination of sulphur content — X-ray fluorescence spectrometric method
ISO 5930:1979	Cryolite, natural and artificial, and aluminium fluoride for industrial use Determination of phosphorus content Reduced molybdophosphate photometric method
ISO 4277:1977	Cryolite, natural and artificial Conventional test for evaluation of free fluorides content
ISO 1694:1976	Cryolite, natural and artificial Determination of iron content 1,10- Phenanthroline photometric method
ISO 3431:1976	Sodium fluoride primarily used for the production of aluminium — Determination of soluble sulphates content — Turbidimetric method
ISO 4280:1977	Cryolite, natural and artificial, and aluminium fluoride for industrial use Determination of sulphate content Barium sulphate gravimetric method
ISO 1620:1976	Cryolite, natural and artificial — Determination of silica content — Reduced molybdosilicate spectrophotometric method