ISO INTERNATIONAL STANDARD 29681 First edition 2009-12-15 Paper, board and pulps Determination of pH of salted water extracts Papier, carton et pates - Détermination du pH des extraits d'eau salée Reference number ISO 29681:2009(E) @ ISO 2009 by IHS under lic Not for Resale ISO 29681:2009(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 COPYRIGHT PROTECTED DOCUMENT @ ISO2009 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 @ IS0 2009 - All rights reserved ed without license from IHS Not for Resale ISO 29681:2009(E) Contents Page Foreword iv Introductior 1 Scope .2 Normative references 3 Terms and definitions 4 Principle. 5 Reagents 6 Apparatus and equipment. 7 Sampling and preparation of sample ... 8 Procedure.... 8.1 Soaking in salted water.. 8.2 Calibration of the pH-electrodes. 8.3 Measurement 9 Calculatior 10 Precisior 10.1 Repeatability 10.2 Reproducibility 10.3 Comparison of results obtained using ISO 6588-1 and ISO 6588-2 11 Test report 5 AnnexA(informative)Preparationofstandardbuffersolutions .6 Annex B (informative) Comparison of results between ISO 29681 and ISO 6588-1 and ISsO 6588-2... Bibliography.. Copyright International Organization for Standardizalon ghts reserved ii se from IHS Not for Resale