ISO INTERNATIONAL STANDARD 2612 First edition 2023-12 Analysis of natural gas Biomethane Determination of ammonia content by tuneable diode laser absorption spectroscopy Analyse du gaz naturel Biométhane -Détermination de la teneur en ammoniac par spectroscopie d'absorption laser a diode accordable Reference number IS0 2612:2023(E) @ IS0 2023 IS0 2612:2023(E) COPYRIGHT PROTECTED DOCUMENT @IS02023 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 2023 - All rights reserved