ISO INTERNATIONAL STANDARD 23909 First edition 2008-04-15 Soil quality Preparation of laboratory samples from large samples Qualite du sol- Préparation des échantillons de laboratoire a partir d'échantillons de grande taille Reference number ISO 23909:2008(E) @ ISO 2008 by IHS under lic Not for Resale ISO 23909:2008(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by IsO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below COPYRIGHTPROTECTEDDOCUMENT @ ISO2008 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, 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 @ ISO 2008 - All rights reserved edwithoutlicense from IHS Not for Resale ISO 23909:2008(E) Contents Page Foreword Introduction 1 Scope 2 Normative references 3 Terms and definitions 4 Principle. 5 Apparatus 6 Procedure.. 6.1 General.. 6.2 Methods of sample division. 6.3 Reduction of sample size.. 7 Test report .... Annex A (informative) Minimum size of subsamples as a function of the maximum size of macro- aggregates or particles present in the sample.... 8 Bibliography Copyright internatinal organizaionfar standardizalion ghts reserved ii nse from IHS Not for Resale