ISO 13658-2000 PDF

Full title and description

ISO 13658:2000 — Zinc sulfide concentrates — Determination of zinc content — Hydroxide precipitation and EDTA titrimetric method. This International Standard specifies a hydroxide‑precipitation pretreatment to remove interfering components followed by an EDTA complexometric titration (with appropriate indicators and corrections) for the assay of zinc in zinc sulfide ores and concentrates.

Abstract

This standard defines a laboratory procedure combining hydroxide precipitation (to remove Fe, Al, Mn and other interfering species) and EDTA titrimetry (using an appropriate indicator and cadmium correction where required) to determine the zinc mass fraction in zinc sulfide ores and concentrates. It is intended for materials with zinc contents in the approximate range 10 % (m/m) to 60 % (m/m).

General information

• Status: Published.
• Publication date: March 2000 (Edition 1, 2000-03).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 73.060.99 — Other metalliferous minerals.
• Edition / version: 1 (2000).
• Number of pages: 23.

Information above is drawn from the ISO catalogue entry and confirmed by several national adoption records.

Scope

Applies to the analytical determination of zinc mass fraction in zinc sulfide ores and concentrates (typical working range 10 % to 60 % Zn, m/m). The method covers sample dissolution and treatment steps to remove or mask interfering metals and insoluble residues, followed by EDTA titration and any necessary corrections (for example for cadmium) to report the zinc content for routine laboratory control and commercial assay purposes.

Key topics and requirements

• Applicable material: zinc sulfide ores and concentrates with ~10–60 % Zn (m/m).
• Principle: dissolution of sample, precipitation of Al/Fe/Mn as hydroxides, separation or masking of other interfering elements, then complexometric titration of zinc with EDTA using a suitable indicator (e.g., xylenol orange) at controlled pH.
• Interference handling: procedures to remove or account for Fe, Al, Mn, Cu, Pb and cadmium — cadmium is determined separately or corrected for to obtain accurate zinc values.
• Reagents and dissolution: specified reagents and digestion steps (e.g., oxidizing acids and, where required, fluoride/sulfate treatments for residues) to ensure complete extraction of zinc for titration.
• Precision and reporting: defined calculation and correction steps to report zinc mass fraction suitable for routine assay, quality control and commercial trading purposes.

Key method details and procedural requirements are described in the ISO text.

Typical use and users

Used by metallurgical laboratories, mining company assay and quality control teams, independent analytical laboratories, and trading/contracting parties who require standardized zinc assays for concentrates. The method is intended for routine laboratory analysis, contractual testing and internal quality assurance in the zinc concentrates supply chain.

Related standards

Related documents from the same technical committee (ISO/TC 183) and neighboring topics include standards for sampling and testing of sulfide concentrates and alternate zinc determination methods, for example ISO 13291 (zinc — solvent extraction and EDTA titrimetric method), ISO 12743 (sampling procedures), and other ISO methods for metal determinations in concentrates. National adoptions (e.g., Standards Australia adoption AS 2678.3‑2002) reproduce ISO 13658:2000 for local use.

Keywords

zinc sulfide, zinc concentrates, zinc determination, EDTA titrimetry, hydroxide precipitation, assay method, concentrate analysis, ISO 13658:2000.

FAQ

Q: What is this standard?

A: ISO 13658:2000 is an International Standard that specifies a hydroxide‑precipitation pretreatment and EDTA titrimetric procedure for determining zinc content in zinc sulfide ores and concentrates.

Q: What does it cover?

A: It covers sampling‑to‑analysis steps needed to dissolve concentrates, remove or mask common interferences (Fe, Al, Mn, etc.), perform EDTA titration of zinc (with indicator), and apply corrections (e.g., for cadmium) to report zinc mass fraction in the 10–60 % Zn range.

Q: Who typically uses it?

A: Metallurgical and mineral analysis laboratories, mining company QC/assay teams, independent assay houses, and commercial/contracting parties that require standardized zinc assays for trade and quality control.

Q: Is it current or superseded?

A: As published in March 2000 (Edition 1) the standard is listed in the ISO catalogue as published and has been subject to periodic review; it remains an active published International Standard in the ISO record. Users should check the ISO catalogue or national standards bodies for any later revisions or replacements before applying the method.

Q: Is it part of a series?

A: It belongs to the family of ISO/TC 183 standards addressing chemical analysis of copper, lead, zinc and nickel ores and concentrates; related standards address sampling, alternate zinc determination techniques and other metal assays in concentrates. National adoptions (identical reproductions) exist in some countries.

Q: What are the key keywords?

A: Key keywords include zinc sulfide concentrates, zinc determination, EDTA titration, hydroxide precipitation, concentrate analysis, ISO 13658.