ISO INTERNATIONAL STANDARD 8245 Second edition 1999-03-01 Water quality Guidelines for the determination of total organic carbon (TOC) and dissolved organic carbon (DOC) Qualité de I'eau - Lignes directrices pour le dosage du carbone organique total (COT) et carbone organique dissous (COD) ISO Referencenumber ISO 8245:1999(E) THS unde Not for Resale ISO 8245:1999(E) Contents 1 Scope 2Normativereference 3 Terms and definition 4 Principle... 2 5 Reagents 6Apparatus 7 Sampling and samples... 7.1 Sampling. 7.2 Preparation of the water sample 8Procedure. 8.1 Calibration 8.2 Control procedures. 8.3 Determination. 9 Expression of results 9.1 Method of calculation... 9.2 Precision. 6 10 Test report Annex A (informative) Results of an interlaboratory trial for ToC determination .. .8 Annex B (informative) ToC determination for samples containing particles Bibliography @ISO1999 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International OrganizationforStandardization Casepostale56·CH-1211Geneve20·Switzerland Internet [email protected] Printed in Switzerland Copyright International Organization for Standardization Not for Res @ISO ISO8245:1999(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 technica committees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhas liaison with isO, also take part in the work. isO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 3. 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 8245 was prepared by Technical Committee ISO/TC 147, Water quality, Subcommittee SC 2, Physical, chemical and biochemical methods. This second edition cancels and replaces the first edition (isO 8245:1987) which has been technically revised. Annexes A and B of this International Standard are for information only.