Résumé
A sample of toluene-soluble extract from brown coal or lignite obtained by the procedure describes in ISO 975 is extracted with acetone at a temperature of 18 to 22 °C. The soluble fraction is filtered or centrifuged off and after evaporation of the solvent dried to constant mass. The percentage of acetone-soluble material is calculated from the mass of reidue after drying.
Informations générales
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État actuel: AnnuléeDate de publication: 1985-12Stade: Annulation de la Norme internationale [95.99]
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Edition: 2Nombre de pages: 2
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Comité technique :ISO/TC 27/SC 5ICS :73.040
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Cycle de vie
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Précédemment
AnnuléeISO 1017:1975
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Actuellement
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Révisée par
PubliéeISO 1017:2006