ISO INTERNATIONAL STANDARD 16729 First edition 2013-11-01 Soil quality Digestion of nitric acid soluble fractions of elements Qualité du sol - Digestion des éléments solubles dans I'acide nitrique Reference number IS0 16729:2013(E) LSO IS02013 IHS under ted without license from IHS Not for Resale IS0 16729:2013(E) COPYRIGHTPROTECTEDDOCUMENT ISO2013 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. ISO copyright office Case postale 56:CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland @ IS0 2013 - All rights reserved No reproductic networking permited without license from IHS Not for Resale IS0 16729:2013(E) Contents Page Foreword ..iv Introduction. 1 Scope. ..1 2 Normative references 3 Principle 4 Interferences and sources of errors 5 Reagents ..2 6 Apparatus ..3 7 Digestion procedure ..4 8 Test report ..5 Annex A (informative) Repeatability and reproducibility data ..6 Bibliography .8 Copyrhtnteatonal Onadiza rights reserved iii d by IHS under lic se with ISt ed without license from IHS Not for Resale