ISO INTERNATIONAL STANDARD 22016 First edition 2015-05-15 Determination of sulfur in refractory products and raw materials by gravimetric, photometric and titrimetric methods Dosage du soufre dans les produits réfractaires et les materiaux bruts par gravimétrie, et des méthodes photométriques et titrimeétriques Reference number ISO 22016:2015(E) SO International Organization for Standardization Institute of Sta andardization5956617 IS02015 vided by IHS under ted without license from IHS IS0 22016:2015(E) COPYRIGHTPROTECTEDDOCUMENT IS0 2015, Published in Switzerland 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. IsOcopyrightoffice Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org PrganizationforStandardization etworking permitted without license from IHS IS0 22016:2015(E) Contents Page Foreword ..iv 1 Scope .1 2 Normative references ..1 3 Terms and definitions ..1 4 Apparatus 4.1 General ..1 4.2 Apparatus specified in method B 5 Reagents .3 5.1 General. .3 5.2 Standard solutions for method B .5 6 Sample preparation ..5 7 Determination of sulfur. 7.1 General .6 7.2 Method A ..6 7.2.1 MethodA1 6 7.2.2 Method A2 .7 7.3 MethodB 8 7.3.1 Principle .8 7.3.2 Mass of test portion .8 7.3.3 Procedure .8 7.3.4 Blanktest. .9 7.3.5 Calculation. .9 7.4 Method C .9 7.4.1 Principle .9 7.4.2 Mass of test portion .9 7.4.3 Procedure. .9 7.4.4 Calculation. .10 8 Test report .10 Annex A (informative) Statistical results of sulfur analyses in refractories and raw materials. ...11. Bibliography .13 iii see=Zhejiang Institute of Standardization 5956617 vided by IHS under lic withoutlicense from IHS