ISO INTERNATIONAL STANDARD 17586 First edition 2016-02-15 Soil quality Extraction of trace elements using dilute nitric acid Qualité du sol - Extraction d'eléments traces a I'aide d'acide nitrique dilué Reference number ISO 17586:2016(E) ISO International Organization for Standardization e=ZHEJIANG INST OF STANDARDIZATION C1 5956617 @IS02016 vided by IHS under I No reproduction or networking permitted without license from IHS IS0 17586:2016(E) COPYRIGHTPROTECTEDDOCUMENT IS0 2016, 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 Internationai ibr DrganizationforStandardization Licensee-ZHEJIANG INST OF STANDARDIZzRoISQ6- All rights reserved Not for Resale, 2016/4/26 02:28:19 networking permited withoutlicense from IHS IS0 17586:2016(E) Contents Page Foreword ..iv 1 Scope 2 Normative references 3 Terms and definitions 4 Principle 5 Interferences ..2 6 Reagents ..2 7 Apparatus ? 8 Procedure .3 8.1 Sample preparation .3 8.2 Determining water content .3 8.3 Extraction .3 8.4 Phase separation .4 8.5 Blank test .4 8.6 Measurement oftrace elements 9 Calculation ..4 10 Expression of results 11 Test report Annex A (informative) Precision. ..7 Annex B (informative) Notes on homogenization, initial sample mass and extraction ..13 Bibliography ..14 iii nSee=ZHEJIANG INST OF STANDARDIZATION C1 5956617 thout license from IHS