Résumé
PrévisualiserThe method is principle to coating materials having lead contents in the range of about 0,01 % (m/m) to 2 % (m/m), may also be applicable to products with a total lead content of more than 2 % (m/m) when the requirements of precision does not exceed the specified values. two methods are given. The principle of the dry ashing method consists in evaporation of a test portion to dryness and ashing at 475 C and extraction of any lead in the residue with hydrochloric acid; that of the wet oxidation method consists in wet oxidation of a test portion with a mixture of sulfuric acid and hydrogen peroxide or with sulfuric acid and nitric acid and extraction of any lead in the residue with EDTA and ammonia solution.
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État actuel: PubliéeDate de publication: 1984-10
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Edition: 1Nombre de pages: 6
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- ICS :
- 87.040 Peintures et vernis
Acheter cette norme
| Format | Langue | |
|---|---|---|
| std 1 40 | ||
| std 2 40 | Papier |
- CHF40
Cycle de vie
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