ISO INTERNATIONAL STANDARD 5815-1 Secondedition 2019-07 Water quality Determination of biochemical oxygen demand after n days (BODn) - Part 1: Dilution and seeding method with allylthiourea addition Qualite de I'eau - Détermination de la demande biochimique en oxygene apres n jours (DBOn) - Partie 1: Méthode par dilution et ensemencement avec apport d'allylthiouree Reference number ISO 5815-1:2019(E) @ IS0 2019 IS0 5815-1:2019(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2019 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may 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: +41 22 749 01 11 Fax: +41 22 749 09 47 Email: copyright@iso.org Website: www.iso.org Published in Switzerland ii @ IS0 2019 - All rights reserved