ISO INTERNATIONAL STANDARD 5931 First edition 2000-08-15 Carbonaceous materials used in the production of aluminium Calcined coke and calcined carbon products Determination of total sulfur by the Eschka method Produits carbonés utilisés pour la production de I'aluminium - Coke calciné et produits carbonés calcinés -Dosage du soufre total par la methode Eschka Reference number ISO 5931:2000(E) ISO @ISO2000 Standardization No reproduction or networking permitted without license from IHS ISO 5931:2000(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 downloading this file, 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 @ISO2000 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, elec- ber 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.ch Printed in Switzerland ISO2000-All rights reserved No reproduction or networking pemitted without license from IHS Not for Resale ISO 5931:2000(E) Contents Page 1 Scope 2 Normative references 3 Principle 4 Reagents 1 5 Apparatus 2 6 Preparation of test sample 2 7 Procedure 3 8 Expression of results 4 9 Precision 5 10 Test report 5 Annex ADerivationoffactorsusedinthecalculationinclause8 6 Bibliography.. on forStandardizationuserved ili NoreroductionornetworkingpemittedwithoutlicensefromHS ISO 5931:2000(E) Foreword ISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodies(lsO mittees. 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 non-governmental, in liai- sonwithISO,alsotakepartinthework.TSOcollaboratescloselywiththeInternationalElectrotechnicalCommission (lEC)onallmattersofelectrotechnicalstandardization International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 3 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. patent rights. IsO shall not be held responsible for identifying any or all such patent rights. International Standard ISO 5931 was prepared by Technical Committee ISO/TC 47, Chemistry, Subcommittee SC 7, Annex A of this International Standard is for information only @ ISo 2000 - All rights reserved No reproduction or networking permitted without license from IHS ISO 5931:2000(E) Introduction Instrumental methods for a more rapid determination of total sulfur are now available. If such a method is to be used, method (see clause 9). V Nreroductiononeworkingemitedwithout licensefromH Not for Resale withISC No reproduction or networking pemitted without license from IHS Not fr Resale ISO 5931:2000(E) INTERNATIONAL STANDARD Carbonaceous materials used in the production of aluminium - Calcined coke and calcined carbon products Determination of total sulfur by the Eschka method 1 Scope This International Standard specifies a reference method for determining the total sulfur content of calcined coke and calcined carbon products by the Eschka method, provided that they contain a minimum of O,1 % by mass and prefer- ably less than 4 % by mass of sulfur. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International