ISO INTERNATIONAL STANDARD 23596 First edition 2023-08 Rare earth Determination of rare earth content in individual rare earth metals and their compounds Gravimetric method Terres rares-Determination dela teneur en terresrares dans les differents métaux des terres rares etleurs composes-Méthode gravimetrique Referencenumber IS023596:2023(E) ISO IS02023 IS023596:2023(E) COPYRIGHTPROTECTEDDOCUMENT ISO2023 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying,or posting on the internet or an intranet, without prior written permission. Permission can be requested from either Iso at the address below orISo's memberbody in the countryoftherequester. Iso copyright office CP401:Ch.de Blandonnet8 CH-1214 Vernier, Geneva Phone:+4122 749 0111 Email: [email protected] Website:www.iso.org Published inSwitzerland ii @IS02023-All rights reserved