ISO 2366:1974
$13.00
Cryolithe naturelle et artificielle — Dosage du sodium — Méthodes par spectrophotométrie de flamme (émission) et par absorption atomique
| Published By | Publication Date | Number of Pages |
| ISO | 1974-11 | 8 |
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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