Résumé
The method consists in calcination of a test portion in the presence of sulphuric acid solution and weighing of the ash in form of sulphate.
Cycle de vie
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Précédemment
PubliéeISO 4322:1977
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Actuellement
The method consists in calcination of a test portion in the presence of sulphuric acid solution and weighing of the ash in form of sulphate.