ISO INTERNATIONAL STANDARD 10708 First edition 1997-02-01 Water quality -- Evaluation in an aqueous medium of the ultimate aerobic biodegradability of organic compounds Determination of biochemical oxygen demand in a two-phase closed bottle test Qualite de I'eau -- Evaluation en milieu aqueux de la biodegradabilité aerobie ultime des composés organiques - Determination de la demande biochimique en oxygene en fiole fermée a deux phases This material is reproduced from Iso documents under International Organization for Standardization (IsO) Copyrignt License number IHS/IcC/1996. Not for resale. No part of these Iso documents may be reproduced in any form, electronic retrievai system or otherwise, except as allowed in the copyright law of the country of use, or with the prior written consent of Iso (Case postale 56, 1211 Geneva 20, Switzeriand, Fax +41227341079),IHSortheISOLicensor'smembers. X ISO Reference number ISO 10708:1997(E) Copyright IntemationalOrganizationfor Standardization No reproduction or networking permitted without license from IHS Not for Resale ISO 10708:1997(E) Contents 1Scope 2 Normative reference.. 3 Definitions 4Principle 5 Test environment. 6Reagents 7 Apparatus.. 8Procedur 9 Calculation and expression of results. 10 Validity of the test... 10 11 Test report .10 Annex A (informative) Calculation of the theoretical oxygen demand (ThOD)... 12 Annex B (informative) Determination of the chemical oxygen demand (CoD). Annex C (informative) Correction for oxygen uptake for interference by nitrification 14 Annex D (informative) Example of a degradation curve... Annex E (informative) Bibliography . @ISO1997 or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm,without permission in writing from thepublisher. International OrganizationforStandardization Casepostale56.CH-1211Geneve20.Switzerland Internet [email protected] X.400 C=ch; a=400net; p=iso; O=isocs; s=central Printed in Switzerland ii yright International Organization for Standardizatio @ISO ISO10708:1997(E) Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards bodies (IsO member bodies). The work of preparing International Standards is normally carried out through IsO technical the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with IsO, also take part in the work. isO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard iSO 10708 was prepared by Technical Committee ISO/TC 147, Water quality, Subcommittee SC 5, Biologicalmethods. Annexes A to E of this International Standard are for information only. ii