ISO INTERNATIONAL STANDARD 14720-1 Firstedition 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 matieres premieres pour produits réfractaires-Dosage du soufre dans les matieres premieres non oxydantes sous forme de poudreet degranulés- Partie 1: Méthodes d'essai par infrarouge Reference number IS0 14720-1:2013(E) LSO @ IS0 2013 I without license from IHS Not for Resale IS0 14720-1:2013(E) COPYRIGHTPROTECTEDDOCUMENT ISO2013 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 Case postale 56:CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @ IS0 2013 - All rights reserved No reproductic networking permited without license from IHS Not for Resale IS0 14720-1:2013(E) Contents Page Foreword ..iv 1 Scope. 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 Testreport .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 iii se with IS thout license from IHS Not for Resale