Norm

ISO 1691:1976 en

Sodium and potassium silicates for industrial use - Determination of carbonates content - Gas-volumetric method

31,57

Over deze norm

Status Definitief
Aantal pagina's 5
Gepubliceerd op 01-07-1976
Taal Engels
Three 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.

Details

ICS-code 71.060.50
Nederlandse titel Sodium and potassium silicates for industrial use - Determination of carbonates content - Gas-volumetric method
Engelse titel Sodium and potassium silicates for industrial use - Determination of carbonates content - Gas-volumetric method

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