ISO INTERNATIONAL STANDARD 11426 Fourth edition 2021-03 Jewellery and precious metals Determination of gold - Cupellation method (fire assay) Joaillerie, bijouterie et métaux précieux - Dosage de I'or - Méthode de coupellation (essai au feu) . Reference number IS0 11426:2021(E) OSI @ ISO 2021 IS0 11426:2021(E) COPYRIGHTPROTECTEDDOCUMENT IS02021 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 or ISo's member body in the country of the requester. ISO copyright office CP 401 · Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Email: [email protected] Website: www.iso.org Published in Switzerland i @ IS0 2021 - All rights reserved