ISO 10280-1991 PDF

Full title and description

ISO 10280:1991 — Steel and iron — Determination of titanium content — Diantipyrylmethane spectrometric (spectrophotometric) method. This international standard specifies a chemical spectrophotometric procedure using diantipyrylmethane as the complexing reagent to determine titanium in steels and irons.

Abstract

ISO 10280:1991 defines a diantipyrylmethane spectrophotometric method for quantifying titanium in steel and iron. The method is intended for titanium contents approximately in the range 0.002 % to 0.80 % (mass fraction) and covers sample dissolution, complex formation, calibration and result calculation for routine laboratory determinations. The 1991 edition has been withdrawn and a new edition (ISO 10280:2025) has been published to replace it.

General information

• Status: Withdrawn / superseded (revised and republished as ISO 10280:2025).
• Publication date: May 1991 (Edition 1).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 77.080.01 — Ferrous metals in general.
• Edition / version: Edition 1 (1991).
• Number of pages: 8 pages (original ISO published document).

Scope

Applies to the determination of titanium in steels and irons by a diantipyrylmethane spectrophotometric procedure. The method describes sample preparation and dissolution, formation of the titanium–diantipyrylmethane complex, measurement of absorbance, calibration and calculation of results. It is intended for titanium concentrations from about 0.002 % to 0.80 % by mass and for routine chemical analysis in metallurgical and testing laboratories.

Key topics and requirements

• Sample preparation and dissolution procedures suitable for steel and iron matrices (acid digestion/pretreatment).
• Formation of the titanium–diantipyrylmethane complex and control of reaction conditions (pH, time, temperature).
• Use of spectrophotometric measurement (specified wavelength and instrumentation requirements).
• Calibration curve construction, use of standards and calculation of titanium mass fraction.
• Declared applicable concentration range (≈0.002 % to 0.80 %) and associated detection/quantification considerations.
• Interference identification and masking or correction procedures for common alloying elements and matrix effects.
• Precision, repeatability and result reporting conventions for laboratory test reports.
• Safety and chemical handling notes relevant to reagents and acids used in sample preparation.

Typical use and users

Used by metallurgical test laboratories, quality control departments in steelworks and foundries, materials testing services, and standards bodies. Typical applications include routine composition checks of steels and irons, verification of supplier certificates, research laboratories investigating alloying element effects, and regulatory or contract compliance testing. Laboratories use the method when a reliable, low-cost spectrophotometric determination of titanium is required within the stated concentration range.

Related standards

National and regional adoptions and related documents have existed (EN/ISO adoptions and national translations/editions, e.g., UNE-EN ISO 10280, ÖNORM EN ISO 10280), and the method sits among other ISO chemical analysis standards for steels produced by ISO/TC 17/SC 1. The 1991 edition has been superseded by the 2025 edition (ISO 10280:2025).

Keywords

ISO 10280, titanium determination, diantipyrylmethane, spectrophotometric method, steel analysis, iron analysis, chemical analysis, metallurgical testing, alloying elements, ISO/TC 17.

FAQ

Q: What is this standard?

A: ISO 10280:1991 is an ISO method for determining the titanium content of steels and irons using a diantipyrylmethane spectrophotometric procedure.

Q: What does it cover?

A: It covers sample dissolution, complex formation with diantipyrylmethane, spectrophotometric measurement, calibration, calculation and reporting of titanium results for concentrations roughly between 0.002 % and 0.80 % by mass.

Q: Who typically uses it?

A: Metallurgical and materials testing laboratories, steel and foundry quality-control personnel, standards organizations and researchers needing a routine chemical method for titanium in ferrous metals.

Q: Is it current or superseded?

A: ISO 10280:1991 has been withdrawn and superseded by a later edition — ISO 10280:2025 — which republished and updated the method. Users should refer to the 2025 edition for the current, authoritative procedure.

Q: Is it part of a series?

A: It is one of several ISO chemical analysis standards for steel and iron prepared under ISO/TC 17/SC 1 (methods of chemical analysis for iron and steel). Laboratories often use it alongside other ISO methods for determination of elements in ferrous materials.

Q: What are the key keywords?

A: Titanium, diantipyrylmethane, spectrophotometry, steel, iron, chemical analysis, ISO 10280.