ISO INTERNATIONAL STANDARD 6869 First edition 2000-12-01 Animal feeding stuffs Determination of the contents of calcium, copper, iron, magnesium, manganese, potassium, sodium and zinc Method using atomic absorption spectrometry Aliments des animaux Détermination des teneurs en calcium, cuivre, fer, magnésium, manganese, potassium, sodium et zinc Méthode par spectromeétrie d'absorption atomique Reference number ISO 6869:2000(E) ISO @ ISO 2000 ISO 6869:2000(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat accepts no liability in this area. AdobeisatrademarkofAdobeSystemsIncorporated Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. Iplteu on @ISO2000 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 either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Case postale 56 . CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] 5 Web www.iso.ch Printed in Switzerland ii @ ISO 2000 - All rights reserved ISO 6869:2000(E) Contents Foreword, 1 Scope. 2 Normative references 3 Principle... 4 Reagents and materials . 5 Apparatus 6 Sampling... 7 Preparation of test sample. 8 8.1 Detection of presence of organic matter 8.2 Testportion... 8.3 Dry ashing .... 8.4 Decomposition 8.5 Blank solution. 8.6 Determinationofcopper,iron,manganeseandzinc 8.7 Determination of calcium, magnesium, potassium and sodium 9 Expression of results. 10 Precision... 10.1 Interlaboratory tests . 10.2 Repeatability... 10.3 Reproducibility. 11 Test report AnnexA(informative)Resultsofinterlaboratorytests. Bibliography @ ISO 2000 - All rights reserved ili