ISO INTERNATIONAL STANDARD 14719 First edition 2011-12-01 Chemical analysis of refractory material glass and glazes Determination of Fe2+ and Fe3+ by the spectral photometric method with 1,10-phenanthroline Analyse chimique de materiaux réfractaires, du verre et d'emaux- Dosage de Fe2+ et Fe3+ par la méthode spectrophotométrique en utilisant la 1,10-phénanthroline Reference number ISO 14719:2011(E) @ ISO 2011 THS unde nse from IHS Not for Resale ISO 14719:2011(E) COPYRIGHTPROTECTEDDOCUMENT @ISO2011 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 copyright@iso.org Web www.iso.org Published in Switzerland @ ISO 2011 - All rights reserved itted without license from IHS Not for Resale ISO 14719:2011(E) Contents Page Foreword .iv 1 Scope 2 Normative references 3 Terms and definitions . 4 Principle of Methods A and B 5 Sample preparation 2 6 Interferences 7 Sampledisintegrationandmeasurement 2 8 Calculationandexpressionofresults 9 9 Test report.... Annex A (informative) Precision. Bibliography.... Copyright International Organization for Standardizallon'ghts reserved ii from IHS Not for Resa