Résumé
PrévisualiserThree cases, defined by a preliminary test, are envisaged: silicates containing neither sulphides nor chlorates; silicates containing sulphides; silicates containing chlorates. The method based on boiling of an acidified test portion containing methyl orange and with a lead paper strip in the vapour. The presence of sulphides produces blackening of the paper and the presence of chlorates decolorizes the methyl orange. Volumetric*measurement of carbon dioxide evolved from silicates containing neither sulphides nor chlorates by reaction with a hydrochloric acid solution. The principle for the oxidation of sulphides and the reduction of chlorates are specified.
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État actuel: PubliéeDate de publication: 1976-07
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Edition: 1Nombre de pages: 5
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- ICS :
- 71.060.50 Sels
Acheter cette norme
Format | Langue | |
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std 1 40 | ||
std 2 40 | Papier |
- CHF40
Cycle de vie
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Actuellement
PubliéeISO 1691:1976
Les normes ISO sont réexaminées tous les cinq ans
Stade: 90.60 (En cours d'examen)
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