Fruits, vegetables and derived products — Determination of zinc content — Part 1: Polarographic method
NORM herausgegeben am 24.4.1986
Bezeichnung normen: ISO 6636-1:1986
Ausgabedatum normen: 24.4.1986
Zahl der Seiten: 3
Gewicht ca.: 9 g (0.02 Pfund)
Land: Internationale technische Norm
Kategorie: Technische Normen ISO
Description / Abstract: 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.