ISO/TR TECHNICAL REPORT 18230 First edition 2015-08-15 Iron ores Determination of loss on ignition Non-oxidised ores Minerais de fer-Determination de la perte au feu-Minerais non oxydés Reference number IS0/TR 18230:2015(E) SO International Organization for Standardization -Zhejiang Instituteof Stal andardization5956617 IS02015 itted without license from IHS IS0/TR 18230:2015(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 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 Intenatinair PrganizationforStandardization Not for Resale, 2015/11/11 07:08:07 etworking permitted without license from IHS IS0/TR 18230:2015(E) Contents Page Foreword ..iv Introduction. 1 Scope.. .1 2 Principle. 3 Reagents 4 Apparatus ..1 5 Sampling and samples .2 5.1 Laboratory sample. .2 5.2 Preparation of test samples .2 6 Procedure 2 6.1 Number of determinations 2 6.2 Test portion. .2 6.3 Determination 2 6.3.1 Pre-treatment of crucible .2 6.3.2 Determination of LOI .3 7 Expression of results .3 7.1 Calculationofloss on ignition .3 7.2 General treatment of results 3 7.2.1 Repeatability and permissible tolerances 3 7.2.2 Determinationofanalyticalresult 4 7.2.3 Between-laboratories precision .4 7.2.4 Check for trueness. .4 7.2.5 Calculation of final result .5 8 Test report .5 Annex A (informative) Flowsheet of the procedure for the acceptanceof analytical values for test samples .6 Bibliography iii vided by IHS under I ithout license from IHS