ISO INTERNATIONAL STANDARD 10258 Third edition 2018-02 Copper sulfide concentrates Determination of copper content - Titrimetric methods Concentrés desulfuredecuivre-Dosageducuivre-Methodes titrimétriques Reference number IS0 10258:2018(E) ISO @IS0 2018 IS0 10258:2018(E) COPYRIGHTPROTECTEDDOCUMENT IS02018 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 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, Switzerland Tel. +41 22 749 01 11 Fax+4122 749 09 47 [email protected] www.iso.org Published in Switzerland ii @ IS0 2018 - All rights reserved IS0 10258:2018(E) Contents Page Foreword ..iv 1 Scope ..1 2 Normativereferences 3 Terms and definitions 4 Principle 4.1 Method 1 (Long iodide method) .1 4.2 Method 2 (Short iodide method) 5 Reagents ..2 6 Apparatus ..4 .4 7 Sample. 7.1 Test sample .4 7.2 Test portion ..4 8 Procedure .4 8.1 Number ofdeterminations .4 8.2 Blanktest .5 8.3 DeterminationMethod 1:Longiodidemethod .5 8.3.1 Decomposition oftestportion .5 8.3.2 Separation of copper. 5 8.3.3 Dissolution of copper precipitate .6 8.3.4 Titration 6 8.3.5 FAAS determination ofcopper in the insolubleresidue, filtrate, and filter paper..6 8.4 DeterminationMethod 2:Shortiodidemethod 7 8.4.1 Decompositionof thetestportion. 7 8.4.2 Titration 7 9 Expression of results .8 10 Precision ..8 10.1 Expression of precision .8 10.2 Method for obtaining the final result (see Annex B .9 10.3 Precisionbetweenlaboratories .9 10.4 Checkoftrueness .10 11 Test report .11 Annex A (informative)Procedureforthepreparation and determination of themass ofa predried test portion .12 AnnexB (normative)Flowsheetoftheprocedurefortheacceptanceofanalytical values for .14 testsamples AnnexC(informative)Derivationofprecisionformulae ..15 Bibliography .20 IS0 2018-All rights reserved ili