ISO INTERNATIONAL STANDARD 9277 Third edition 2022-11 Determination of the specific surface area of solids by gas adsorption - BET method Détermination de I'aire massigue (surface spécifique) des solides par adsorption de gazMéthode BET Reference number ISO 9277:2022(E) ISO @IS02022 IS0 9277:2022(E) COPYRIGHT PROTECTED DOCUMENT @ IS02022 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: +4122 749 0111 Email: copyright@iso.org Website: www.iso.org Published in Switzerland ii @ IS0 2022 - All rights reserved