AS ISO 19976.1:2020 Copper, lead and zinc sulfide concentrates一 Determination of cadmium Part 1: Flame atomic absorption spectrometric method

AS ISO 19976.1:2020 Copper, lead and zinc sulfide concentrates一 Determination of cadmium Part 1: Flame atomic absorption spectrometric method. This document specifies a flame atomic absorption spectrometric method for the determination of the mass fraction of cadmium in copper, lead and zinc sulfide concentrates as follows: a) for copper sulfide concentrates, the method is applicable to the determination of mass fractions of cadmium from 0,01 % to 0,30 %; b) for lead sulfide concentrates, the method is applicable to the determination of mass fractions of cadmium from 0,01 % to 0,30 %; c) for zinc sulfide concentrates, the method is applicable to the determination of mass fractions of cadmium from 0,05 % to 0,30 %. 2 Normative reference The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. Iso 385, Laboratory glassware — Burettes Iso 648, Laboratory glassware — Single-volume pipettes ISO 1042, Laboratory glassware — One-mark volumetric flasks ISO 4787, Laboratory glassware — Volumetric instruments — Met hods for testing of capacity and for use ISO 9599, Copper, lead, zinc and nickel sulfide concentrates — Determination of hygroscopic moisture content of the analysis sample — Gravimetric method ISO 12743, Copper, lead, zinc and nickel concentrates — Sampling procedures for determination of metal and moisture content ISO Guide 35, Reference materials — Guidance for characterization and assessment of homogeneity and stability 3 Terms and definitions No terms and definitions are listed in this document. ISO and IEC maintain terminological databases for use in standardization at the following addresses: — ISO Online browsing platform: available at https://www.iso.org/obp — IEC Electropedia: available at http://www.electropedia.org/ 4 Principle Dissolve the test portion in hydrochloric acid and nitric acid. Add hydrofluoric acid to remove silicon. Then add perchloric acid and determine the iron concentration in the test portion using an atomic absorption spectrometer (AAS) with a deuterium lamp for background correction at 228,8 nm. 5 Reagents During the analysis, use only reagents ot recognized analytical grade and distilled water or water ot equivalent purity.AS ISO 19976.1 pdf download.