ISO INTERNATIONAL STANDARD 21078-2 First edition 2006-12-01 Determination of boron(Ill) oxide in refractory products Part 2: Acid extraction method for the determination of boron(lll) oxide in binder components Dosage de I'oxyde de bore(lll) dans les produits refractaires - Partie 2: Methode d'extraction acide pour le dosage de I'oxyde de bore(ll) dans les composants de liant Referencenumber ISO 21078-2:2006(E) ISO @ ISO 2006 ISO 21078-2:2006(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 instailed on the computer performing the editing. In accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. 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 @ISO2006 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing 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 [email protected] Web www.iso.org Published in Switzerland @ ISO 2006 - All rights reserved ISO 21078-2:2006(E) Contents Page 1 Scope 2 Normative references 3 Terms and definitions 4 Preparation of the test sample 5 Reagents... 2 6 Mass of test portion for extraction . 2 7 Preparation of the test solution 2 8 Blank solution . 3 9 Classification of determination methods 3 10 Determination of boron(Ill) oxide by sodium hydroxide titrimetry 3 11 Determination of boron(ll) oxide by inductived coupled plasma/atomic emission spectrometry .... 5 12 Curcumine absorption spectrophotometry (Rothocyanine method) 6 13 Quality assurance and control 9 14 Expression of test results 9 15 Test report 10 ganizationfor Stand ii ISO 21078-2:2006(E) Foreword ISsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (isO member bodies). The work of preparing International Standards is normally carried out through iSO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. IsO shall not be held responsible for identifying any or all such patent rights. ISO 21078-2 was prepared by Technical Committee ISO/TC 33, Refractories. Iso 21078 consists of the following parts, under the general title Determination of boron(lll) oxide in refractory products: Part 1: Determination of total boric oxide in oxidic materials for ceramics, glass and glazes Part 2: Acid extraction method for the determination of boron(lll) oxide in binder components @ ISO 2006 - All rights reserved INTERNATIONAL STANDARD ISO 21078-2:2006(E) Determination of boron(lll) oxide in refractory products - Part 2: Acid extraction method for the determination of boron(lll) oxide in binder components 1 Scope This part of IsO 21078 specifies procedures of chemical analysis for the determination of boron(Il) oxide used as a binder component added to aluminosilicate refractories, using an acid extractio