ISO INTERNATIONAL STANDARD 17239 First edition 2004-10-15 Fruits, vegetables and derived products Determination of arsenic content Method using hydride generation atomic absorption spectrometry Fruits, legumes et produit derives - Determination de la teneur en arsenic- - Méthode par spectrométrie d'absorption atomique a génération de hydrure Reference number ISO 17239:2004(E) SO @ ISO 2004 ISO 17239:2004(E) PDFdisclaimer 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 accepts no liability in this area. Adobe is a trademarkof Adobe Systems Incorporated. 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. ?ISO2004 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, 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] Web www.iso.org Published in Switzerland ii @ISO 2004 -All rights reserved ISO 17239:2004(E) Contents Page Foreword 1 Scope. 2 Principle. 3 Reagents .. 4 Apparatus 5 Sample.. 6 Procedure 7 Calculation. 8 9 Test report 6 Annex A (normative) Apparatus Annex B (informative) Results of the interlaboratory test. Bibliography ... @ Is0 2004-All rights reserved ili ISO 17239:2004(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 a technical committee has been International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 3 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 castingavote. subject of patent rights. IsO shall not be held responsible for identifying any or all such patent rights. International Standard ISO 17239 was prepared by Technical Committee ISO/TC 34, Food products, Subcommittee Sc 3, Fruit and vegetable products. iv @ Is0 2004 - All rights reserved ISO 17239:2004(E) INTERNATIONAL STANDARD Fruits, vegetables and derived products Determination of arsenic content Method using hydride generation atomic absorption spectrometry 1 Scope This International Standard specifies a hydride generation atomic absorption spectrometric method for the determination of the arsenic content of fruits, vegetables and derived products. NOTE Methods for Analysis (see Reference [1]). 2 Principle Organic matter is decomposed by digestion with HNO3 in a closed system. Arsenic(V) is reduced to priortoatomization inaflame-heatedquartz cell.Measurementisbyatomicabsorptionspectrometry 3 Reagents Use only reagents of recognized analytical grade, unless otherwise specified, and distilled or demineralized water or water of equivalent purity. 3.1 Nitric acid, concentrated, (P2o = 1,38 g/ml) 3.2 Hydrochloric acid, 8 mol/l solution. make up to the mark with water. Mix. 3.3Hydrochloric acid, diluted 1 + 1, by volume. Mix one volume of concentrated hydrochloric acid (P2o = 1,19 g/ml) with one volume of water. 3.4Magnesium chloride, 37,5 mg/ml so