ISO INTERNATIONAL STANDARD 20565-1 First edition 2008-12-01 Chemical analysis of chrome-bearing refractory products and chrome-bearing raw materials (alternative to the X-ray fluorescence method) - Part 1: Apparatus, reagents, dissolution and determination of gravimetric silica Analysechimiquedesproduitsrefractairescontenantduchromeetdes matieres premieres contenant du chrome (methode alternative a la methode parfluorescence de rayons X) Partie 1: Appareillage, reactifs, mise en solution et détermination de la teneur en silice par gravimétrie Reference number ISO 20565-1:2008(E) @ ISO 2008 Standardization No reproduction or networking permitted without license from IHS Not for Resale ISO20565-1:2008(E) PDFdisclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The iso Central Secretariat accepts no liability in this area. Adobeis atrademarkofAdobeSystemsIncorporated 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 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 CoDvriaht ational Oraanization for Standardization @ ISO 2008 - All rights reserved bv IHS unde rith ISO No reproduction or networking permitted without license from IHS Nt fr Resale ISO20565-1:2008(E) Contents Page Foreword, iv 1 Scope 2 Normativereferences 3 Terms and definitions .. 2 4 Apparatus 2 5 Reagents. 5.1 Stock reagents 5.2 Indicators. 5.3 Standard solutions 6 Sample preparation . 11 7 Basic procedure.. .12 8 Determination of loss on ignition (gravimetric). 12 9 Decomposition of the sample and preparation of solutions used in the analysis... 12 9.1 General decomposition techniques... 12 9.2 Dissolution methods by fusion .... 12 9.3 Dissolutionmethodsbyhydrofluoricacidattack... 9.4 Separation methods by ion-exchange.... .16 10 Calculation and expression of test results .. ..19 11 Examinationand adoption of test results.. 19 12 Testreport ...19 Annex A (informative) References for stock solutions and blank solutions in Iso 20565-1:2008 ....20 andardization'ghts reserved ii with ISC Noreproductionornetworking pemitted withoutlicensefrom IHS Not for Resale