Aktívna norma | Vydaná: 01.11.1974

ISO 2366:1974

Cryolite, natural and artificial — Determination of sodium content — Flame emission and atomic absorption spectrophotometric methods
(Cryolithe naturelle et artificielle — Dosage du sodium — Méthodes par spectrophotométrie de flamme (émission) et par absorption atomique)

Dostupné jazyky: Anglicky, Francúzsky

Dostupné prevedenie: Elektronické PDF, Tlačené

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Podrobné informácie

Označenie: ISO 2366:1974

Dátum vydania: 01.11.1974

Stránok: 4

Krajina: Medzinárodná technická norma

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Anotácia

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.

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