ISO INTERNATIONAL STANDARD 20899 First edition 2018-09 Water quality Plutonium and neptunium Test method using ICP- MS Qualite de I'eau - Plutonium et neptunium - Methode d'essai par ICP-MS Referencenumber IS020899:2018(E) so @IS02018 IS020899:2018(E) COPYRIGHTPROTECTEDDOCUMENT @ISO2018 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 countryof therequester. ISO copyright office CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone:+41227490111 Fax:+4122749 09 47 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2018 - All rights reserved IS020899:2018(E) Contents Page Foreword ..iv Introduction. 1 Scope. ..1 2 Normative references ..1. 3 Terms, definitions, symbols and abbreviated terms. ..2 4 Principle ..3 5 Reagents. .4 6 Apparatus .5 7 Sampling. .5 8 Sample preparation .5 8.1 General .5 8.2 Storage .5 8.3 Chemical separation .5 9 Measurement procedure. .6 9.1 General .6 9.2 Quantification with internal calibration and isotopic dilution .6 10 Expression ofresults .6 10.1 General 6 10.2 Mass bias evaluation .7 10.3 Internal calibration and isotopic dilution .7 11 Uncertainties for isotopic dilution .8 12 Instrumentaldetectionlimit ..8 13 Limitofquantification ..8 14 Activity concentration determination ..9 15 Testreport .9 AnnexA (informative)Chemical separation of plutonium and neptuniumby specific resin ..10 Bibliography .12 @IS0 2018 -All rights reserved iii