STD.1S0 11212-3-ENGL 199748519030703571 233 INTERNATIONAL ISO STANDARD 11212-3 First edition 1997-03-15 Starch and derived products Heavy metals content Part 3: Determination of lead content by atomic absorption spectrometry with electrothermal atomization Amidons, fécules et produits derivés Teneur en metaux lourds Partie 3:Determinationde la teneuren plomb parspectrometrie d'absorption atomique avec atomisation électrothermique 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 alliowed in the copyright faw of the country of use, or with the prior written consent of IsO (Case postale 56, 1211 Geneva 20, Switzerland, Fax +41 22 7341079),IHsortheIsoLicensor'smembers. ISO Reference number ISO 11212-3:1997(E) yright International Organization for Standardizatior Not for Resale 4851903070357217T STD.IS0 11212-3-ENGL 1997 ISO11212-3:1997(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 technical committees. Each member body interested in a subject for which atechnicalcommitteehasbeenestablishedhastherighttoberepresented 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 11212-3 was prepared by Technical Committee ISO/TC 93, Starch (including derivatives and by-products). IsO 11212 consists of the following parts, under the general title Starch andderivedproductsHeavymetalscontent. Part 1: Determination of arsenic content by atomic absorption spectrometry Part 2: Determination of mercury content by atomic absorption spectrometry Part 3: Determination of lead content by atomic absorption spectrometrywith electrothermalatomization Part 4: Determination of cadmium content by atomic absorption spectrometry with electrothermal atomization Annex A of this part of ISO 11212 is for information only. @ISO1997 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; 0=isocs; S=central Printed in Switzerland Copyright International Organization for Standardization y IHS unde Notfor Resa 48519030703573006 266T 19N3-E-2T2TT 051415 INTERNATIONAL STANDARD @ISO ISO 11212-3:1997(E) Starch and derived products -- Heavy metals content - Part 3: Determination of lead content by atomic absorption spectrometry with electrothermal atomization 1 Scope This part of IsO 11212 specifies a method for the determination of the lead content of starch, including derivatives and by-products, by atomic absorption spectrometry with electrothermal atomization. The number of parameters for the procedure involved in the electrothermal atomization is far larger than in flame atomization; it is thus impossible to propose a comprehensive method likely to ensure the attainment of satisfactory results on all types of apparatus currently available. Each analyst should therefore optimize the conditions of use of his/her own apparatus on the basis of general or particular instructions.