ISO 10280-2025 PDF

Full title and description

ISO 10280:2025 — Steel and iron — Determination of titanium content — Diantipyrylmethane spectrophotometric method. This International Standard specifies a diantipyrylmethane-based spectrophotometric procedure for measuring titanium in steels and irons, intended for routine laboratory analysis and quality control.

Abstract

The document describes a diantipyrylmethane spectrophotometric method applicable to titanium contents in steel and iron in the range 0.002 % to 0.80 % (mass fraction). The standard covers sample dissolution and residue treatment, formation of the titanium–diantipyrylmethane complex and spectrophotometric measurement, plus requirements for reagents, calibration and expression of results.

General information

• Status: Published.
• Publication date: September 2025 (ISO registry).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 77.080.01 (Ferrous metals in general).
• Edition / version: Edition 2 (2025).
• Number of pages: 12 (ISO official PDF). Note: some national/adopted versions or draft publications (EN/DIN editions) report different pagination in their publication formats.

Scope

Specifies a spectrophotometric method employing 4,4'-diantipyrylmethane for determination of titanium in steels and irons. Applicable range is approximately 0.002 % to 0.80 % (mass fraction). The scope includes procedures for sample decomposition (acid dissolution and treatment of insoluble residues), formation of the coloured titanium complex, instrument measurement, calibration, quality-control checks and expression of results.

Key topics and requirements

• Analytical principle: formation of a yellow titanium–diantipyrylmethane complex and spectrophotometric measurement at the prescribed wavelength.
• Sample preparation: specified acid dissolution procedures and fusion/treatment of any insoluble residue to ensure complete titanium recovery.
• Reagents and standards: defined reagent grades (including diantipyrylmethane reagent) and preparation of calibration standards.
• Calibration and measurement: recommended calibration range, blank correction, check standards and wavelength/photometric performance checks.
• Applicability and limits: lower and upper determination limits (0.002 % to 0.80 % mass fraction) and associated uncertainty/quality-control guidance.
• Reporting: expression of results, repeatability/accuracy notes and handling of interferences.

These topics reflect the method content and normative requirements of the ISO publication.

Typical use and users

Used by industrial and commercial metallurgical laboratories, steelmakers, foundries, independent testing houses, quality-control and R&D laboratories involved in composition analysis of steels and irons. It is intended for routine chemical analysis where a validated spectrophotometric procedure for titanium is required.

Related standards

Key related documents include the withdrawn ISO 10280:1991 (previous edition), the EN/BSI national adoptions (EN ISO 10280:2025 / BS EN ISO 10280), and other methods for titanium analysis such as ASTM E878 (diantipyrylmethane method for iron ores) and EN standards using FAAS for titanium (e.g., EN 10211). Standards covering analysis of titanium in titanium alloys (for different matrices) such as ISO 22962 are also relevant when working across materials.

Keywords

titanium determination, diantipyrylmethane, spectrophotometry, steel analysis, iron analysis, chemical analysis, ISO 10280, metallurgical laboratory, sample dissolution, calibration

FAQ

Q: What is this standard?

A: ISO 10280:2025 is an International Standard that specifies a diantipyrylmethane spectrophotometric method for determining titanium content in steels and irons.

Q: What does it cover?

A: It covers sample decomposition and residue treatment, formation of the titanium–diantipyrylmethane complex, spectrophotometric measurement, calibration, quality-control checks and how to express results for titanium contents from about 0.002 % to 0.80 % (mass fraction).

Q: Who typically uses it?

A: Metallurgical and chemical analysis laboratories in steelworks, foundries, independent testing facilities, and R&D groups that require a validated routine method for titanium in ferrous materials.

Q: Is it current or superseded?

A: ISO 10280:2025 is the current published edition (Edition 2, 2025) and supersedes ISO 10280:1991 (withdrawn).

Q: Is it part of a series?

A: It is part of the body of ISO standards on chemical analysis and test methods for ferrous metals (ISO/TC 17/SC 1). Related analysis methods and national/adopted versions (EN ISO) exist; users should check for any regional adoptions or national normative changes.

Q: What are the key keywords?

A: Titanium, diantipyrylmethane, spectrophotometry, steel, iron, chemical analysis, calibration, sample dissolution.