Resumen
The method consists in preparing of a test solution as specified in ISO 5317, precipitating of potassium ions by sodium tetraphenylborate in a weakly alkaline medium in the presence of disodium ethylenediaminetetraacetate dihydrate (EDTA, disodium salt) and formaldehyde, followed by filtrating of the precipitate, drying and weighing.
Informaciones generales
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Estado: RetiradaFecha de publicación: 1983-12Etapa: Retirada de la Norma Internacional [95.99]
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Edición: 1Número de páginas: 3
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Comité Técnico :ISO/TC 134ICS :65.080
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