Résumé
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.
Informations générales
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État actuel: AnnuléeDate de publication: 1978-05Stade: Annulation de la Norme internationale [95.99]
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Edition: 1Nombre de pages: 3
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Comité technique :ISO/TC 34/SC 3ICS :67.080.01
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Cycle de vie
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Actuellement
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Révisée par
PubliéeISO 5518:2007