ISO INTERNATIONAL 11047 STANDARD First edition 1998-05-01 Soil quality Determination of cadmium, chromium, cobalt, copper, lead, manganese, nickel and zinc in aqua regia extracts of soil Flame and electrothermal atomic absorption spectrometric methods Qualite du sol Dosage du cadmium, chrome, cobalt, cuivre, plomb, manganese, nickel et zinc dans les extraits de sol a I'eau régale Méthodes par spectrométrie d'absorption atomique avec flamme et atomisationélectrothermigue ISO Reference number ISO 11047:1998(E) ISO 11047:1998(E) Contents Page Scope 1 Normative references 2 2 Method A Determination of cadmium, chromium, cobalt., 3 copper, lead, manganese, nickel and zinc by flame atomic 223 absorption spectrometry . Principie .... 3.1 3.2 Reagents. 3.3 Preparation of stock and standard solutions of individual elements. 4 3.4 Apparatus 6 3.5 699 Procedure Determination of test portion. 3.6 Calculation 3.7 3.8 10 Precision 3.9 Expression of results. 10 3.10 Test report... 10 Determination of cadmium, chromium, cobalt, Method B 4 copper, lead, manganese, nickel and zinc by electrothermal 10 atomicabsorptionspectrometry 10 4.1 Principle ... Reagents... 11 4.2 Stock and standard solutions 11 4.3 13 4.4 Apparatus.. Procedure 13 4.5 Calibration and determination, 15 4.6 5566 Plotting the graph ... 4.7 4.8 4.9 Expression of results. 4.10 Precision .... 4.11 Test report. 16 Annex A Results of interlaboratory tests .. 17 ISO1998 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 central@iso.ch X.400 C=ch; a=400net; p=iso; 0=isocs; S=central Printed in Switzerland ISO 11047:1998(E) @ISO Foreword federation of national standards bodies (isO member bodies). The work of preparing International Standards is normally carried out through IsO technicalcommittees.Eachmemberbodyinterestedinasubjectforwhich 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 11047 was prepared by Technical Committee ISO/TC 190, Soil quality, Subcommittee SC 3, Chemical methods and soil characteristics. Annex A of this International Standard is for information only. ili