Resumen
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.
Informaciones generales
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Estado: RetiradaFecha de publicación: 1985-12Etapa: Retirada de la Norma Internacional [95.99]
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Edición: 2Número de páginas: 2
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Comité Técnico :ISO/TC 27/SC 5ICS :73.040
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Ciclo de vida
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Anteriormente
RetiradaISO 1017:1975
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Ahora
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Revisada por
PublicadoISO 1017:2006