ISO 2366:1974

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

Publication date: Nov 1, 1974

General information

Current stage: 90.60 Effective date: Mar 7, 2018

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 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.

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PUBLISHED
ISO 2366:1974
90.60 Close of review
Mar 7, 2018

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