ISO INTERNATIONAL STANDARD 2597-2 Third edition 2019-04 Iron ores Determination of total iron content - Part 2: Titrimetric methods after titanium(III) chloride reduction Minerais de fer - Dosage du fer total - Partie 2: Methodes titrimetriques apres reduction au chlorure de titane(II) Reference number ISO 2597-2:2019(E) [so @ IS0 2019 IS0 2597-2:2019(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2019 All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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 CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Fax: +41 22 749 09 47 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2019 - All rights reserved IS0 2597-2:2019(E) Contents Page Foreword ..iv 1 Scope .1 2 Normative references ..1 3 Terms and definitions 4 Principle .2 4.1 Decomposition of the test portion .2 4.1.1 Acid decomposition. .2 4.1.2 Fusion-filtration. 2 4.2 Titration of iron 2 5 Reagents ..2 6 Apparatus. ..4 7 Sampling and samples 7.1 Laboratory sample .4 7.2 Preparation of test samples .5 7.2.1 General. 5 7.2.2 Ores having significant contents of combined water or oxidizable compounds... 5 7.2.3 Ores outside the scope of Z.2.2 .5 8 Procedure .5 8.1 Number of determinations ..5 8.2 Blank test and check test. .5 8.3 Determination of hygroscopic moisture content. .6 8.4 Testportion ..6 8.5 Determination .6 8.5.1 Decomposition of the test portion .6 8.5.2 Reduction. .7 9 Expression of results .8 9.1 Calculation of total iron content .8 9.2 General treatment of results .9 9.2.1 Repeatability and permissible tolerance ..9 9.2.2 Determination of analytical result 10 9.2.3 Between-laboratories precision 10 9.2.4 Check for trueness. .10 9.2.5 Calculation of final result ..11 9.2.6 Oxidefactors .12 10 Test report ..12 Annex A (normative) Flowsheet of the procedure for the acceptance of analytical values for test samples ..13 Annex B (normative) Procedure of Japanese weighing method ..14 Bibliography .15 @ IS0 2019 - All rights reserved ii