ISO INTERNATIONAL STANDARD 13164-4 Second edition 2023-07 Water quality - Radon-222 Part 4: Test method using two-phase liquid scintillation counting Qualité de I'eauRadon 222- Partie 4: Méthode d'essai par comptage des scintillations en milieu liquide a deux phases Reference number ISO 13164-4:2023(E) Tso IS02023 IS0 13164-4:2023(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 or IsoO'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 ii @ IS0 2023 - All rights reserved