prEN ISO 14720-2

Testing of ceramic materials - Determination of sulfur in non-oxidic ceramic raw materials and ceramic materials - Part 2: Inductively coupled plasma optical emission spectrometry (ICP-OES) or ion chromatography (IC) after burning in the oxygen flow (ISO/DIS 14720-2:2025)

This part of ISO 14720 defines a method for the determination of sulfur in powdered and granular non-oxidic ceramic raw materials and materials, which are completely oxidized at a higher temperature in an oxygen atmosphere, e.g. carbon and graphite materials.
For materials which are not completely oxidizable under these conditions, it is possible to determine sulfur that can be released under these conditions, e.g. the adherent sulfur.
This part of ISO 14720 is applicable for materials with mass fractions of sulfur ≤ 10 % and mass fractions of ash < 20 %, The defined method is limited for materials with mass fractions of barium < 10 mg/kg, because the sulfur bonded in barium sulfate is not detectable with this method.
For the lower detection limit of this method, a mass fraction of sulfur of 0,5 mg/kg in the case of inductively coupled plasma optical emission spectrometry (ICP/OES) and 5 mg/kg in the case of ion chromatography (IC) has to be considered as a recommended value.

Prüfung keramischer Werkstoffe - Bestimmung des Schwefelgehaltes in nichtoxidischen keramischen Roh- und Werkstoffen - Teil 2: Optische Emissionsspektrometrie mit induktiv gekoppeltem Plasma (ICP-OES) oder Ionenchromatographie (IC) nach Verbrennung im Sauerstoffstrom (ISO/DIS 14720-2:2025)

Essai des matières céramiques - Détermination de la teneur en soufre des matières premières céramiques non oxydes et des matériaux céramiques non oxydes - Partie 2: Spectrométrie d'émission optique avec plasma couplé inductif (ICP-OES) ou chromatographie ionique (IC) après combustion dans le courant d'oxygène (ISO/DIS 14720-2:2025)

Preskušanje keramičnih materialov - Ugotavljanje žvepla v neoksidativnih keramičnih surovinah in osnovnih materialih - 2. del: Atomska emisijska spektrometrija z induktivno sklopljeno plazmo (ICP AES) ali ionska kromatografija (IC) po izpostavitvi ognju v pretoku kisika (ISO/DIS 14720-2:2025)

General Information

• Status: Not Published
• Publication Date: 21-Sep-2026
• ICS: 81.060.10 - Raw materials
• Technical Committee: CEN/TC 187 - Refractory products and materials
• Drafting Committee: CEN/TC 187/WG 4 - Chemical analysis
• Current Stage: 4020 - Submission to enquiry - Enquiry
• Start Date: 27-Feb-2025
• Completion Date: 27-Feb-2025
• Ref Project: oSIST prEN ISO 14720-2:2025 - Testing of ceramic materials - Determination of sulfur in non-oxidic ceramic raw materials and ceramic materials - Part 2: Inductively coupled plasma optical emission spectrometry (ICP-OES) or ion chromatography (IC) after burning in the oxygen flow (ISO/DIS 14720-2:2025)

Relations

• Revises: EN ISO 14720-2:2013 - Testing of ceramic raw and basic materials - Determination of sulfur in powders and granules of non-oxidic ceramic raw and basic materials - Part 2: Inductively coupled plasma optical emission spectrometry (ICP/OES) or ion chromatography after burning in an oxygen flow (ISO 14720-2:2013)
• Effective Date: 17-Apr-2024

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2025
Preskušanje keramičnih materialov - Ugotavljanje žvepla v neoksidativnih
keramičnih surovinah in osnovnih materialih - 2. del: Atomska emisijska
spektrometrija z induktivno sklopljeno plazmo (ICP AES) ali ionska kromatografija
(IC) po izpostavitvi ognju v pretoku kisika (ISO/DIS 14720-2:2025)
Testing of ceramic materials - Determination of sulfur in non-oxidic ceramic raw materials
and ceramic materials - Part 2: Inductively coupled plasma optical emission spectrometry
(ICP-OES) or ion chromatography (IC) after burning in the oxygen flow (ISO/DIS 14720-
2:2025)
Prüfung keramischer Werkstoffe - Bestimmung des Schwefelgehaltes in nichtoxidischen
keramischen Roh- und Werkstoffen - Teil 2: Optische Emissionsspektrometrie mit
induktiv gekoppeltem Plasma (ICP-OES) oder Ionenchromatographie (IC) nach
Verbrennung im Sauerstoffstrom (ISO/DIS 14720-2:2025)
Essai des matières céramiques - Détermination de la teneur en soufre des matières
premières céramiques non oxydes et des matériaux céramiques non oxydes - Partie 2:
Spectrométrie d'émission optique avec plasma couplé inductif (ICP-OES) ou
chromatographie ionique (IC) après combustion dans le courant d'oxygène (ISO/DIS
14720-2:2025)
Ta slovenski standard je istoveten z: prEN ISO 14720-2
ICS:
81.060.10 Surovine Raw materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
International
Standard
ISO/DIS 14720-2
ISO/TC 33
Testing of ceramic materials -
Secretariat: BSI
Determination of sulfur in non-
Voting begins on:
oxidic ceramic raw materials and
2025-02-24
ceramic materials —
Voting terminates on:
2025-05-19
Part 2:
inductively coupled plasma optical
emission spectrometry (ICP-OES)
or ion chromatography (IC) after
burning in the oxygen flow
Essai des matières céramiques — Détermination de la teneur
en soufre des matières premières céramiques non oxydes et des
matériaux céramiques non oxydes —
Partie 2: Spectrométrie d'émission optique avec plasma couplé
inductif (ICP-OES) ou chromatographie ionique (IC) après
combustion dans le courant d'oxygène
ICS: 81.060.10
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 14720-2:2025(en)
DRAFT
ISO/DIS 14720-2:2025(en)
International
Standard
ISO/DIS 14720-2
ISO/TC 33
Testing of ceramic materials -
Secretariat: BSI
Determination of sulfur in non-
Voting begins on:
oxidic ceramic raw materials and
ceramic materials —
Voting terminates on:
Part 2:
inductively coupled plasma optical
emission spectrometry (ICP-OES)
or ion chromatography (IC) after
burning in the oxygen flow
Essai des matières céramiques — Détermination de la teneur
en soufre des matières premières céramiques non oxydes et des
matériaux céramiques non oxydes —
Partie 2: Spectrométrie d'émission optique avec plasma couplé
inductif (ICP-OES) ou chromatographie ionique (IC) après
combustion dans le courant d'oxygène
ICS: 81.060.10
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
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or ISO’s member body in the country of the requester.
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TO SUBMIT, WITH THEIR COMMENTS,
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Published in Switzerland Reference number
ISO/DIS 14720-2:2025(en)
ii
ISO/DIS 14720-2:2025(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Interferences . 2
5.1 Inductively coupled plasma optical emission spectrometry (ICP-OES) .2
5.1.1 Spectral interferences .2
5.1.2 Physical interferences .2
5.2 Ion chromatography (IC) .2
6 Apparatus . 3
7 Reagents . 3
8 Sampling and sample preparation . 4
9 Preparation . 4
9.1 Combustion device .4
9.2 Oxygen (7.10) .4
9.3 Inductively coupled plasma optical emission spectrometer (6.7) .4
9.4 Ion chromatograph (6.8) . .4
10 Calibration . 4
10.1 Inductively coupled plasma optical emission spectrometer .4
10.2 Ion chromatograph .4
11 Performance . 5
11.1 Determination of the blank value .5
11.2 Determination of the sulfur content .5
12 Calculation and report of the results . 5
13 Precision . 6
13.1 Repeatability .6
13.2 Reproducibility .6
14 Test report . 6
Annex A (informative) Example of a combustion device . 7
Annex B (informative) Example for suitable operating parameters for the determination of
sulfur by ion chromatography . . 8
Annex C (informative) Example for suitable operating parameters for the determination of
sulfur by inductively coupled plasma optical emission spectroscopy . 9
Annex D (informative) Results of the round-robin test . 10
Annex E (informative) Information regarding the validation of the uncertainty of the mean
value .13
Annex F (informative) Commercial Certified Reference Materials (CRM) . 14
Bibliography .15

iii
ISO/DIS 14720-2:2025(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
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
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with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 14720-2 was prepared by Technical Committee ISO/TC 33, Refractories.
ISO 14720 consists of the following parts, under the general title Testing o
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