INTERNATIONAL ISO STANDARD 11459 First edition 1997-10-15 Iron ores - Certified reference materials - Preparation and certification for use in chemical analysis Minerais de fer- Materiaux de reference certifiés - Préparation et certificationpourI'emploi en analyse chimique This material is reproduced from iso documents under International Organization for Standardization (Iso) Copyright License number IHS/ICC/1996. Not for resale. No part of these ISo documents may be reproduced in any form, electronic retrieval system or otherwise,exceptas alowed in the copyright law of the country of use, or with the prior written consent of Iso (Case postale 56, 1211 Geneva 20, Switzerland, Fax +41 22 734 10 79), IHs or the iso Licensor'smembers. ISo Reference number ISO 11459:1997(E) ISO 11459:1997(E) Foreword ISO (the International Organization for Standardization) is a worldwide 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 non-governmental, in liaison with IsO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) onall 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 11459 was prepared by Technical Committee ISO/TC 102, Iron ores, Subcommittee SC 2, Chemical analysis. Annexes A and B form an integral part of this International Standard. AnnexesCandDareforinformationonly. 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 photocopyingand microfilm, withoutpermission inwritingfromthepublisher. International Organization for Standardization Casepostale56.CH-1211Geneve20Switzerland Internet [email protected] C=ch; a=400net; p=iso; 0=isocs; s=central X.400 Printed in Switzerland i @ISO IS011459:1997(E) Introduction This International Standard is intended for use in conjunction with other International Standards for the chemical analysis of iron ores prepared by ISO/TC 102. It follows the principles described in ISO Guides 30, 31, 33 and 35 (see clause 2 and annex D) on the same subject prepared by ISO/REMCO, modified to take into account the special needs of the iron oreanalyticalcommunity. The accuracy (precision and trueness) of International Standard methods for the chemical analysis of iron ore has been assessed under international conditions during the development of this International Standard. This standard document are met. To ensure that these conditions are met, an accuracy control mechanism is included in all recently published International Standards for the chemical analysis of iron ores. The precision control is achieved by using methods described in ISO 5725-2. The trueness control is achieved by using certified reference material (CRM) iron ores. To work properly, the CRM must be prepared Standard is designed to give the minimum requirement for producing CRM iron ores of sufficient quality for use in conjunction with Internationa! Standards for the chemical analysis of iron ores. ili