ISO INTERNATIONAL STANDARD 14720-2 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 2: Inductively coupled plasma optical emission spectrometry (IcP/oES) or ion chromatography after burning in an oxygen flow Essais des matieres premieres pour produits refractaires - Dosage du soufre dans les matierespremieres non oxydantes sous forme de poudre et de granules - Partie 2: Spectrométrie d'emission optique avec plasma induit par haute fréquence (ICP/OES) ou chromatographie ionique apres combustion dans un courant d'oxygene Reference number IS0 14720-2:2013(E) TSO @ IS0 2013 nse from IHS Not for Resale IS0 14720-2:2013(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 14720-2:2013(E) Contents Page Foreword ..iv 1 Scope .1 2 Normative references .1 3 Terms and definitions ..1 4 Principle ..1 5 Interferences ..2 5.1 ICP/OES .2 5.2 Ion chromatography .2 6 Apparatus ..3 7 Reagents .3 8 Sampling and sample preparation ..4 9 Preparation. ..4 9.1 Combustion device ..4 9.2 Oxygen (Z.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 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 ofthe 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 se with IS thout license from IHS Not for Resale