Resumen
The method consists in homogenizing the product, followed by dilution and acidification of a test portion, extraction of the acid by diethyl ether, then alkaline re-extraction of this acid and purifying by oxidation using acidified potassium dichromate, determination of the acid with a suitable spectrophotometer. The method cannot be applied in the presence of p-chlorobenzoic acid and cinnamic acid, respectively.
Informaciones generales
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Estado: RetiradaFecha de publicación: 1978-05Etapa: Retirada de la Norma Internacional [95.99]
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Edición: 1Número de páginas: 3
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Comité Técnico :ISO/TC 34/SC 3ICS :67.080.01
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Ciclo de vida
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Ahora
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Revisada por
PublicadoISO 5518:2007