ISO 2597-2-2019 PDF

Full title and description

ISO 2597-2:2019 — Iron ores — Determination of total iron content — Part 2: Titrimetric methods after titanium(III) chloride reduction. This international standard specifies two titrimetric procedures (mercury-free) for measuring total iron in natural iron ores, concentrates and agglomerates (including sinter products), using potassium dichromate as titrant after reduction of Fe(III) with tin(II) chloride and titanium(III) chloride; the excess reductant is oxidized either by dilute potassium dichromate (Method 1) or by perchloric acid (Method 2).

Abstract

This document details two titrimetric, mercury-free methods for determining total iron content in iron ores and related materials. The procedures use reduction of Fe(III) (Sn(II) and Ti(III) chloride) followed by back-titration with potassium dichromate; Method 1 oxidizes excess reductant with dilute potassium dichromate, Method 2 with perchloric acid. Applicable concentration range is approximately 30 % to 72 % (mass fraction) Fe.

General information

• Status: Published (International Standard) — confirmed in periodic review (confirmed 2025).
• Publication date: April 2019 (Edition 3, published April 2019; date shown on some adoption pages as 3 April 2019).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 73.060.10 (Iron ores).
• Edition / version: Edition 3 (2019).
• Number of pages: 15 pages (ISO published document length).

Scope

ISO 2597-2:2019 applies to the determination of total iron content in natural iron ores, iron ore concentrates and agglomerates (including sinter products) having total iron contents in the approximate range 30 % to 72 % (mass fraction). It standardizes two titrimetric procedures using potassium dichromate as titrant after chemical reduction, providing laboratories and industry with validated steps to obtain reproducible total-iron results without the use of mercury.

Key topics and requirements

• Two mercury-free titrimetric methods for total iron determination (Method 1: oxidation of excess reductant by dilute potassium dichromate; Method 2: oxidation by perchloric acid).
• Reduction steps using tin(II) chloride and titanium(III) chloride to convert Fe(III) to Fe(II) prior to titration.
• Use of potassium dichromate as the analytical titrant (back-titration approach).
• Applicability limits and recommended concentration range (≈30 %–72 % mass fraction Fe).
• Procedural details and quality controls intended for routine laboratory and plant QC environments (sample preparation, reagents, end‑point criteria, calculation).

Typical use and users

Primary users are metallurgical and geochemical testing laboratories, mining company QC/assay teams, ore concentrator laboratories, standards bodies and regulators. Typical uses include incoming ore quality assessment, concentrate specification testing, process control in beneficiation and sintering operations, and reference-method comparisons in laboratory accreditation.

Related standards

Key related documents in the ISO 2597 series and other methods for total-iron determination include: ISO 2597-1 (titrimetric method after tin(II) chloride reduction — Edition 2006) and ISO/TS 2597-4:2019 (potentiometric titration method). Other national/adopted versions and track‑change publications exist for regional use.

Keywords

iron ores; total iron; titrimetric method; titanium(III) chloride; tin(II) chloride; potassium dichromate; perchloric acid; assay; ore testing; ISO 2597-2:2019.

FAQ

Q: What is this standard?

A: ISO 2597-2:2019 is an ISO International Standard specifying two titrimetric (mercury-free) methods for determining total iron content in iron ores and related materials.

Q: What does it cover?

A: It covers sample applicability, reagents and reduction steps (Sn(II) and Ti(III) chloride), two endpoint/oxidation options (dilute potassium dichromate or perchloric acid) and calculations for reporting total iron in the approximate range 30 %–72 % mass fraction.

Q: Who typically uses it?

A: Metallurgical and geochemical laboratories, mining companies and plant QC teams, regulators and standards committees use it for routine assay and process control. Accredited testing labs often use the method as a reference or routine procedure.

Q: Is it current or superseded?

A: The 2019 edition (Edition 3) is published and showed confirmation in ISO’s periodic review; it supersedes the 2015 edition. Users should check national adoption/confirmation records for local updates, but ISO lists the 2019 edition as the current international publication.

Q: Is it part of a series?

A: Yes — ISO 2597 is a multi‑part series addressing determination of total iron in iron ores. Relevant parts include ISO 2597-1 (titrimetric after Sn(II) reduction) and ISO/TS 2597-4 (potentiometric titration), among related technical specifications and national adoptions.

Q: What are the key keywords?

A: iron ores; total iron; titration; potassium dichromate; titanium(III) chloride; tin(II) chloride; mercury-free methods; assay; ISO 2597-2:2019.