SIST EN ISO 14720-1:2013

SLOVENSKI STANDARD
SIST EN ISO 14720-1:2013
01-maj-2013
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Testing of ceramic raw and basic materials - Determination of sulfur in powders and
granules of non-oxidic ceramic raw and basic materials - Part 1: Infrared measurement
methods (ISO 14720-1:2013)
Prüfung keramischer Roh- und Werkstoffe - Bestimmung des Schwefel-gehaltes in
pulver- und kornförmigen nichtoxidischen keramischen Roh- und Werkstoffen - Teil 1:
Infrarotmessverfahren (ISO 14720-1:2013)
Essais des matières premières pour produits réfractaires - Dosage du soufre dans les
matières premières non oxydantes sous la forme de poudre et granulés - Partie 1:
Méthodes d'essai aux infrarouges (ISO 14720-1:2013)
Ta slovenski standard je istoveten z: EN ISO 14720-1:2013
ICS:
81.060.10 Surovine Raw materials
SIST EN ISO 14720-1:2013 en,fr
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 14720-1:2013

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SIST EN ISO 14720-1:2013


EUROPEAN STANDARD
EN ISO 14720-1

NORME EUROPÉENNE

EUROPÄISCHE NORM
March 2013
ICS 81.060.10
English Version
Testing of ceramic raw and basic materials - Determination of
sulfur in powders and granules of non-oxidic ceramic raw and
basic materials - Part 1: Infrared measurement methods (ISO
14720-1:2013)
Essais des matières premières pour produits réfractaires - Prüfung keramischer Roh- und Werkstoffe - Bestimmung
Dosage du soufre dans les matières premières non des Schwefelgehaltes in pulver- und kornförmigen
oxydantes sous forme de poudre et de granulés - Partie 1: nichtoxidischen keramischen Roh- und Werkstoffen - Teil
Méthodes d'essai par infrarouge (ISO 14720-1:2013) 1: Infrarotmessverfahren (ISO 14720-1:2013)
This European Standard was approved by CEN on 16 February 2013.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same
status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.





EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2013 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 14720-1:2013: E
worldwide for CEN national Members.

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SIST EN ISO 14720-1:2013
EN ISO 14720-1:2013 (E)
Contents Page
Foreword . 3

2

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SIST EN ISO 14720-1:2013
EN ISO 14720-1:2013 (E)
Foreword
This document (EN ISO 14720-1:2013) has been prepared by Technical Committee ISO/TC 33 "Refractories"
in collaboration with Technical Committee CEN/TC 187 “Refractory products and materials” the secretariat of
which is held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by September 2013, and conflicting national standards shall be
withdrawn at the latest by September 2013.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Endorsement notice
The text of ISO 14720-1:2013 has been approved by CEN as EN ISO 14720-1:2013 without any modification.

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SIST EN ISO 14720-1:2013

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SIST EN ISO 14720-1:2013
INTERNATIONAL ISO
STANDARD 14720-1
First edition
2013-03-01
Testing of ceramic raw and basic
materials — Determination of sulfur
in powders and granules of non-oxidic
ceramic raw and basic materials —
Part 1:
Infrared measurement methods
Essais des matières premières pour produits réfractaires — Dosage
du soufre dans les matières premières non oxydantes sous forme de
poudre et de granulés —
Partie 1: Méthodes d’essai par infrarouge
Reference number
ISO 14720-1:2013(E)
©
ISO 2013

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SIST EN ISO 14720-1:2013
ISO 14720-1:2013(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2013
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
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Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2013 – All rights reserved

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SIST EN ISO 14720-1:2013
ISO 14720-1:2013(E)

Contents Page
Foreword .iv
1 Scope . 1
2 Principle . 1
3 Apparatus . 1
4 Reagents . 2
5 Sampling and sample preparation . 2
6 Calibration . 2
7 Performance . 2
7.1 Preparation of analysis . 2
7.2 Determination of blank value . 3
7.3 Determination of sulfur content . 3
8 Calculation and report of the results. 3
9 Precision . 3
9.1 Repeatability . 3
9.2 Reproducibility . 3
10 Test report . 3
Annex A (informative) Results of the round-robin test . 5
Annex B (informative) Information regarding the validation of the uncertainty of the mean value 7
Annex C (informative) Commercial Certified Reference Materials (CRM) .8
Bibliography . 9
© ISO 2013 – All rights reserved iii

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SIST EN ISO 14720-1:2013
ISO 14720-1:2013(E)

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, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely 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 14720-1 was prepared by Technical Committee ISO/TC 33, Refractories.
ISO 14720 consists of the following parts, under the general title Testing of ceramic raw and basic
materials — Determination of sulfur in powders and granules of non-oxidic ceramic raw and basic materials:
— Part 1: Infrared measurement methods
— Part 2: Inductively coupled plasma optical emission spectrometry (ICP/OES) or ion chromatography
after burning in an oxygen flow
iv © ISO 2013 – All rights reserved

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SIST EN ISO 14720-1:2013
INTERNATIONAL STANDARD ISO 14720-1:2013(E)
Testing of ceramic raw and basic materials —
Determination of sulfur in powders and granules of non-
oxidic ceramic raw and basic materials —
Part 1:
Infrared measurement methods
1 Scope
This part of ISO 14720 defines a method for the determination of sulfur in powdered and granular non-
oxidic ceramic raw materials and materials, such as silicon carbides, silicon nitrides, graphites, carbon
blacks, cokes, carbon powders. If proved by the recovery rate, this method can also be applied for other
non-metallic powdered and granular materials, e.g. silicon dioxide.
This part of ISO 14720 is applicable for materials with mass fractions of sulfur from 0,005 % to 2 %.
This part of ISO 14720 can also be applied for materials with higher mass fractions of sulfur after
verification of the particular case.
2 Principle
The sample and added combustion accelerators (mostly tungsten- or iron-granules) are heated in an
inductive furnace under oxygen atmosphere. The high-frequency field of the furnace couples with
electrically conductive components of sample and combustion accelerators. The sample is heated to
temperatures above 1 800 °C and the total sulfur content of the sample is released as sulfur dioxide. The
reaction gas is transferred to the infrared absorption cell of the analyser. The molecular absorption of
...