Fruits, vegetables and derived products — Determination of zinc content — Part 1: Polarographic method
NORMA vydaná dňa 24.4.1986
Označenie normy: ISO 6636-1:1986
Dátum vydania normy: 24.4.1986
Počet strán: 3
Približná hmotnosť: 9 g (0.02 libier)
Krajina: Medzinárodná technická norma
Kategória: Technické normy 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.