FINAL INTERNATIONAL ISO/FDIS DRAFT STANDARD 12782-4 ISO/TC190/SC7 Soil quality Parameters for geochemical Secretariat: DIN modelling of leaching and speciation of Voting begins on: 2012-03-15 constituents in soils and materials Voting terminates on: Part 4: 2012-05-15 Extraction of humic substances from solid samples Qualite du solParametres pourla modelisation géochimique de la lixiviation et de la spéciation des constituants des sols et des materiaux Partie 4: Extraction des substances humiques des échantillons solides Please see the administrative notes on page ili RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT, WITH THEIR COMMENTS, NOTIFICATION OF ANY RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE AND TO PROVIDE SUPPOR TING DOCUMENTATION IN ADDITIONTOTHEIREVALUATIONAS Reference number BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO LOGICAL, COMMERCIAL AND USER PURPOSES ISO/FDIS 12782-4:2012(E) DRAFT INTERNATIONAL STANDARDS MAY ON ISO OCCASION HAVE TO BECONSIDERED INTHE LIGHT OF THEIR POTENTIAL TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE MADE IN Copyright Intemational Organizationfor StandardizationNS. @ISO2012 IHS unde thout license from IHS Not for Resale ISO/FDIS 12782-4:2012(E) Copyright notice This ISO document is a Draft International Standard and is copyright-protected by ISO. Except as permitted under the applicable laws of the user's country, neither this IsO draft nor any extract from it may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, photocopying, recording or otherwise, without prior written permission being secured. Requests for permission to reproduce should be addressed to 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 22749 09 47 E-mail [email protected] Web www.iso.org Reproduction may be subject to royalty payments or a licensing agreement. Violators may be prosecuted. ISO 2012-All rights reserved No repr etworking permitted without license from IHS Not for Resale ISO/FDIS 12782-4:2012(E) ISO/CEN PARALLEL PROCESSING This final draft has been developed within the International Organization for Standardization (isO), and processed under the Iso-lead mode of collaboration as defined in the Vienna Agreement. The final draft was established on the basis of comments received during a parallel enquiry on the draft. This final draft is hereby submitted to the ISO member bodies and to the CEN member bodies for a parallel two-month approval vote in ISO and formal vote in CEN. Positive votes shall not be accompanied by comments Negative votes shall be accompanied by the relevant technical reasons. ii Not for Resale