Cryolite, natural and artificial — Determination of sodium content — Flame emission and atomic absorption spectrophotometric methods

Available format(s)

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

Language(s)

English, French

Published date

01-11-1974

Publisher

International Organization for Standardization

The methods are applicable as alternatives to products for which the molar ratio NaF/AlF3 is equal to about 3. The principle of the flame emission method consists in atomization of the test solution in a flame of oxygen/hydrogen and determination by measurement of the intensity of the radiation at 589 nm. The principle of the flame atomic absorption method is based on atomization in an air/acetylene flame and measuremnt of the absorption of the 589 nm line emitted by a sodium hollow-cathode lamp. The preparation of the test solution is carried out by dissolution of a test portion in hydrochloric acid and water after attack by concentreted sulphuric acid.

DocumentType	Standard
Pages	4
PublisherName	International Organization for Standardization
Status	Current

Standards	Relationship
BS 5050:1974	Similar to
NBN T 03 436 : 1983	Identical

PD ISO/TR 4277:2009	Cryolite, natural and artificial. Conventional test for evaluation of free fluorides content
ISO/TR 4277:2009	Cryolite, natural and artificial Conventional test for evaluation of free fluorides content