ISO/TC 34 Lebensmittelerzeugnisse,
ISO/TC 34 Food products,
ISO/TC 34 Produits alimentaires,
ISO Internationale Organisation für Normung,
ISO International Organization for Standardization,
ISO Organisation Internationale de Normalisation
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Media type:
Standard
Title:
ISO 6636-1
:
Fruits, vegetables and derived products; determination of zinc content; part 1: polarographic method
Other titles:
Obst, Gemüse und deren Erzeugnisse; Bestimmung des Zinkgehalts; Teil 1: Polaragraphisches Verfahren
Fruits, légumes et produits dérivés; détermination de la teneur en zinc; partie 1: méthode polarographique
Description:
The method consists in ashing of a test portion in a muffle furnace at 525+25 C, treating the ash obtained with hydrochloric acid, neutralizing with ammonia solution and determing of the value using an ammonia/ammonium chloride electrolyte. Copper, tin, lead and cadmium do not interfere.