ISO INTERNATIONAL STANDARD 12979 First edition 1999-12-01 Carbonaceous materials used in the production of aluminium Pitch for electrodes Determination of C/H ratio in the quinoline-insoluble fraction Produits carbonés utilisés pour la production de I'aluminium Brais pour electrodes Determination du rapport C/H dans la fraction insoluble dans laquinoleine Reference number ISO 12979:1999(E) ISO @ ISO 1999 THS under ted without license from IHS Not for Resale ISO 12979:1999(E) PDFdisclaimer 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 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. 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 @ISO1999 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-1211Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 734 10 79 E-mail [email protected] Web www.iso.ch Printed in Switzerland @ISo1999-All rightsreserved py IHS unde ermittedwithoutlicense from IHS Not for Resale ISO 12979:1999(E) Contents Page Scope 2 Normative references. 3 Principle. 4 Isolation of quinoline-insoluble material for analysis.. 4.1 Reagents.... 4.2 Apparatus .... 4.3 Sampling and preparation of the test sample.. 4.4 Procedure ... 4.5 Calculation and expression of results... 5 Analysisofguinoline-insolublematerialforcarbonandhydrogencontent 5.1 Reagents.. .5 5.2 Apparatus.. 5.3 Preparation of the apparatus.. 5.4 Procedure.... 5.5 Calculation and expression of results. 5.6 Ash content.... 10 6 Precision 11 6.1 Repeatability 6.2 Reproducibility.. 7 Test report. ii d by IHS under lic cense from IHS Not for Resale