Fruits, vegetables and derived products — Determination of zinc content — Part 1: Polarographic method
NORMA vydána dne 24.4.1986
Označení normy: ISO 6636-1:1986
Datum vydání normy: 24.4.1986
Počet stran: 3
Přibližná hmotnost: 9 g (0.02 liber)
Země: Mezinárodní technická norma
Kategorie: 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.