Resumen
Method A is applicable to products having a total iron content from 1 to 25 % (m/m), and method B is applicable to products having a total iron content from 0.2 to 2 % (m/m). ISO 7990 should be read in conjunction with ISO 4297. Specifies principle, reactions (method A only), reagents, apparatus, sampling and samples, procedure and expression of results.
Informaciones generales
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Estado: PublicadoFecha de publicación: 1985-12Etapa: Norma Internacional confirmada [90.93]
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Edición: 1Número de páginas: 6
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Comité Técnico :ISO/TC 132ICS :73.060.20
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Ciclo de vida
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Anteriormente
RetiradaISO/R 313:1963
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Ahora