ISO INTERNATIONAL STANDARD 12020 First edition 1997-03-01 Water quality -- Determination of aluminium -- Atomic absorption spectrometric methods Qualité de I'eau - Dosage de I'aluminium - Methodes par spectrométrie d'absorption atomique This material is reproduced from Iso documents under International Organization for Standardization (ISo) Copyright License number IHS/IcC/1996. Not for resale. No part of these iso documents may be reproduced in any form, electronic retrieval system or otherwise, except as aliowed in the copyright law of the country of use, or with the prior written consent of IsO (Case postale 56, 1211 Geneva 20, Switzerland, Fax +41 22 734 10 79), IHs or the Is0 Licensor's members. so Reference number ISO12020:1997(E) No reproduction or networking permited without license from IHS Not for Resale ISO12020:1997(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO committees. Each member body interested in a subject for which a technical committee has been established has liaison with isO, also take part in the work. IsO collaborates closely with the International Electrotechnical Commission(lEC)onallmattersofelectrotechnicalstandardization. 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 StandardISO 12020 was prepared by Technical Committee ISO/TC 147, Water Quality, Subcommittee Sc 2, Physical, chemical and biochemical methods. 1SO1997 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 Case postale 56 : CH-1211 Geneve 20 . Switzerland Internet [email protected] X.400 C=ch; a=400net; p=iso; o=isocs; S=central Printed in Switzeriand py IHS under license wi Not for Resale @ISO ISO12020:1997(E) Introduction digestion described in 2.5.3, silicates and oxidic aluminium compounds may not in all cases be quantitatively covered by these methods. Clause 2 refers to the determination of aluminium by flame atomic absorption spectrometry (AAS); in clause 3 a graphite furnace AAS method is described. Copyright Intermational Organization for Standardization i Nreructionneworkingemitewithuliceefrm Not for Resale