oSIST prEN ISO 10280:2025
(Main)Steel and iron - Determination of titanium content - Diantipyrylmethane spectrometric method (ISO/DIS 10280:2025)
Steel and iron - Determination of titanium content - Diantipyrylmethane spectrometric method (ISO/DIS 10280:2025)
Stahl und Eisen - Bestimmung von Titan - Spektralphotometrisches Verfahren mit Diantipyrylmethan (ISO/DIS 10280:2025)
Aciers et fontes - Dosage du titane - Méthode spectrophotométrique au diantipyrylméthane (ISO/DIS 10280:2025)
La présente Norme internationale prescrit une méthode spectrophotométrique de dosage du titane au diantipyrylméthane dans les aciers et les fontes. La méthode est applicable aux teneurs en titane comprises entre 0,002 % (m/m) et 0,80 % (m/m).
Jeklo in železo - Določanje titana - Spektrofotometrijska metoda z diantipirilmetanom (ISO/DIS 10280:2025)
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Standards Content (Sample)
SLOVENSKI STANDARD
01-april-2025
Jeklo in železo - Določanje titana - Spektrofotometrijska metoda z
diantipirilmetanom (ISO/DIS 10280:2025)
Steel and iron - Determination of titanium content - Diantipyrylmethane spectrometric
method (ISO/DIS 10280:2025)
Stahl und Eisen - Bestimmung von Titan - Spektralphotometrisches Verfahren mit
Diantipyrylmethan (ISO/DIS 10280:2025)
Aciers et fontes - Dosage du titane - Méthode spectrophotométrique au
diantipyrylméthane (ISO/DIS 10280:2025)
Ta slovenski standard je istoveten z: prEN ISO 10280
ICS:
77.080.01 Železne kovine na splošno Ferrous metals in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT
International
Standard
ISO/DIS 10280
ISO/TC 17/SC 1
Steel and iron — Determination
Secretariat: JISC
of titanium content —
Voting begins on:
Diantipyrylmethane spectrometric
2025-02-20
method
Voting terminates on:
2025-05-15
Aciers et fontes — Dosage du titane — Méthode
spectrophotométrique au diantipyrylméthane
ICS: 77.080.01
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
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Reference number
ISO/DIS 10280:2025(en)
DRAFT
ISO/DIS 10280:2025(en)
International
Standard
ISO/DIS 10280
ISO/TC 17/SC 1
Steel and iron — Determination
Secretariat: JISC
of titanium content —
Voting begins on:
Diantipyrylmethane
spectrometric method
Voting terminates on:
Aciers et fontes — Dosage du titane — Méthode
spectrophotométrique au diantipyrylméthane
ICS: 77.080.01
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2025
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
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Published in Switzerland Reference number
ISO/DIS 10280:2025(en)
ii
ISO/DIS 10280:2025(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagents . 1
6 Apparatus . 3
7 Sampling and preparation of the test samples . 3
8 Procedure . 3
8.1 Test portion .3
8.2 Blank test .3
8.3 Determination .3
8.3.1 Dissolution of the test portion .3
8.3.2 Treatment of insoluble residue .4
8.3.3 Colour development .4
8.3.4 Spectrophotometric measurements .5
8.4 Establishment of the calibration curve .5
8.4.1 Preparation of the calibration solutions .5
8.4.2 Spectrophotometric measurement .6
8.4.3 Calibration curve.6
9 Expression of results . 7
9.1 Method of calculation .7
9.2 Precision . . .7
10 Special case . 8
11 Test report . 8
Annex A (informative) Additional information on the international precision tests. 9
Annex B (informative) .11
Graphical representation of precision data
Bibliography .12
iii
ISO/DIS 10280:2025(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
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This document was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 1, Methods of
determination of chemical composition.
This second edition cancels and replaces the first edition (ISO 10280:1991) which has been technically
revised.
The main changes are as follows:
— Normative references: updated;
— Clause 3: added;
— Precision data: re-evaluated.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
DRAFT International Standard ISO/DIS 10280:2025(en)
Steel and iron — Determination of titanium content —
Diantipyrylmethane spectrometric method
1 Scope
This document specifies a diantipyrylmethane spectrophotometric method for the determination of
titanium in steel and cast iron.
The method is applicable to titanium contents between 0,002 % (mass fraction) and 0,80 % (mass fraction).
2 Normative references
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 648, Laboratory glassware — Single-volume pipettes
ISO 1042, Laboratory glassware — One-mark volumetric flasks
ISO 3696, Water for analytical laboratory use — Specification and test methods
ISO 14284, Steel and iron — Sampling and preparation of samples for the determination of chemical composition
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 https:// www .electropedia .org/
4 Principle
Dissolution of a test portion in hydrochloric, nitric and sulphuric acids.
Fusion of the residue with potassium hydrogen sulphate.
Formation of a yellow complex with 4,4'-diantipyrylmethane.
Spectrophotometric measurement of the coloured complex at a wavelength of about 385 nm.
5 Reagents
During the analysis, unless otherwise stated, use only reagents of recognized analytical grade and only
grade 2 water as specified in ISO 3696.
5.1 Iron, of high purity containing less than 2 μg/g titanium.
5.2 Potassium hydrogen sulphate (KHSO ).
ISO/DIS 10
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