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Status : Active
Standard Type : Main
Document No : ISO 11456:2025
Document Year : 2025
Pages : 40
Edition : 1
Section Volume : Copper, lead, zinc and nickel ores and concentrates (ISO/TC 183.)
This document specifies an acid digestion and flame atomic absorption spectrometric (AAS) method, or inductively coupled plasma optical emission spectrometric (ICP-OES) method for the determination of the mass fraction of silver in copper and zinc sulfide concentrates.
The method is applicable to concentrates having silver contents in the following ranges.
— copper concentrates: 10 g/t to 800 g/t ;
— zinc concentrates: 10 g/t to 800 g/t