ISO INTERNATIONAL STANDARD 17489 IULTCS/IUC 33 First edition 2013-11-01 Leather Chemical tests Determination of tan content in synthetic tanning agents Cuir - Essais chimiques Détermination de la teneur en tanin dans les agents de tannage synthétiques Reference numbers ISO 17489:2013(E) Iso IULTCS/IUC33:2013(E) Copyright intematinal Organization for Standardization @IS02013 n or networking permitted without license from IHS Not for Resale IS0 17489:2013(E) IULTCS/IUC 33:2013(E) COPYRIGHT PROTECTED DOCUMENT @IS02013 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. 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 Not for Resale IS0 17489:2013(E) IULTCS/IUC 33:2013(E) Contents Page Foreword .iv Introduction. .V 1 Scope. ..1 2 Normative references ..1 3 Terms and definitions 4 Principle ..1 5 Reagents. ..1 6 Apparatus ..1 7 Procedure .2 7.1 Preparation of the synthetic tanning agent solution for analysis .2 7.2 Determination of the total residual dry content (duplicate determination) .2 7.3 Determination of the non-tanning agent content (i.e. non-adsorbable fraction) .3 8 Calculation and expression of results ..3 9 Test report .3 Annex A (informative) Interlaboratory trial results for the determination of the tan content ..4 Annex B (informative) Sources of chemicals Bibliography 6 iii thout license from IHS Not for Resale