ISO INTERNATIONAL STANDARD 11653 First edition 1997-08-15 Steel Determination of high cobalt content Potentiometric titration method after separation by ion exchange Aciers - Dosage du cobalt en fortes teneurs Methode par titrage potentiometrique apres separation paréchange d'ions ISO Reference number ISO 11653:1997(E) Not for Resale ISO11653:1997(E) Foreword 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 with isO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. 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 International Standard ISO 11653 was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 1, Methodsofdeterminationofchemicalcomposition. Annexes A and B of this International Standard are for information only. @ISO1997 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 the publisher. InternationalOrganizationforStandardization Case postale 56 : CH-1211 Geneve 20 . Switzerland Internet [email protected] X.400 C=ch; a=400net; p=iso; o=isocs; S=central Printed in Switzerland Copyrightlntemational Organization for Standardization Noreproduction or networking permitted without license from IHS Not fr Resale ISO 11653:1997(E) INTERNATIONALSTANDARD ISO Steel -- Determination of high cobalt content -- Potentiometric titration method after separation by ion exchange 1 Scope This International Standard specifies a method for the determination of cobalt in steel using a potentiometric titration method after separation by ion exchange. The method is applicable to a cobalt content of between 5,0 % (m/m) and 17,o % (m/m) 2 .Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 648:1977, Laboratory glassware One-mark pipettes. Iso 1042:— 1), Laboratory glassware -- One-mark volumetric flasks. ISO 3696:1987, Water for analytical laboratory use Specification and test methods ISO 5725-1:1994, Accuracy (trueness and precision) of measurement methods and results - Part 1: General principles and definitions. ISO 5725-2:1994, Accuracy (trueness and precision) of measurement methods and results - Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method. IsO 5725-3:1994, Accuracy (trueness and precision) of measurement methods and results - Part 3: Intermediate measures of the precision of a standard measurement method. IsO 14284 :1996, Steel and iron - Sampling and preparation of samples for the determination of chemical composition. 3 Principle Dissolution of a test portion in a mixture of nitric and hydrochloric acids. hydrochloric acid. 1) To be published. (Revision of iSO 1042:1983)