Résumé
PrévisualiserThe 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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État actuel: PubliéeDate de publication: 1974-11
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Edition: 1Nombre de pages: 4
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- ICS :
- 71.060.50 Sels
Acheter cette norme
| Format | Langue | |
|---|---|---|
| std 1 40 | ||
| std 2 40 | Papier |
- CHF40
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