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

The information about the standard:

Designation standards: ISO 2366:1974
Publication date standards: 1.11.1974
The number of pages: 4
Approximate weight : 12 g (0.03 lbs)
Country: International technical standard
Category: Technical standards ISO

Annotation of standard text ISO 2366:1974 :

Description / Abstract: 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.