ISO INTERNATIONAL STANDARD 21253-2 First edition 2019-08 Water quality - Multi-compound class methods - Part 2: Criteria for the guantitative determination of organic substances using a multi-compound class analytical method Qualité de I'eau - Meéthodes d'analyse de composés multi-classes Partie 2: Criteres pour la détermination quantitative de composeés organiques avec une méthode d'analyse de composés multi-classes Reference number IS0 21253-2:2019(E) Tso @IS02019 IS0 21253-2:2019(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2019 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may 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 40i : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone:+41227490111 Fax: +41 22 749 09 47 Email: copyright@iso.org Website: www.iso.org Published in Switzerland ii @ IS0 2019 - All rights reserved