ISO INTERNATIONAL STANDARD 13395 First edition 1996-07-15 Water quality Determination of nitrite nitrogen and nitrate nitrogen and the sum of both by flow analysis (CFA and FlA) and spectrometric detection Qualité de I'eau --- Determination de I'azote nitreux et de I'azote nitrique et de la somme des deux par analyse en flux (CFA et FIA) et détection spectrométrigue ISO Reference number ISO 13395:1996(E) IHS itted without license from IHS Not for Resale ISO 13395:1996(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 sO technical committees. Each member body interested in a subject for which a technical committee has been established has 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 13395 was prepared by Technical Committee ISO/TC 147. Water quality. Subcommittee SC 2. Physical, chemical, biochemicalmethods. Annexes A, B, C and D of this International Standard are for information only @ISO1996 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 Organization for Standardization CasePostale56·CH-1211Geneve20·Switzerland Printed in Switzerland CopyrightIntemational Organizationfor Standardization d without license from IHS Not for Resale @ ISO ISO 13395:1996(E) Introduction automatized and are particularly suitable for the processing of many (upto 100 samplesperhour). A differentiation is made between flow injection analysis (FlA) [1][2] and continuous flow analysis (CFA)[3]. Both methods share the feature of an automatic dosage of the sample into a flow system (manifold) where the analytes in the sample will react with the reagent solutions on their way through the manifold. The sample preparation may be integrated in the manifold. The reaction product is measured in a flow detector (e.g. flow photometer). ii No reproductiono networking permited withou license from IHs Not fr Resale