ISO INTERNATIONAL STANDARD 15774 Second edition 2017-02 Animal and vegetable fats and oils - Determination ofcadmium content by direct graphite furnace atomic absorption spectrometry Corps gras d'origines animaleetvegetale-Détermination de la teneuren cadmiumparspectrometried'absorption atomique afour graphite Referencenumber IS015774:2017(E) so Intemational Organization for Standardization @IS02017 ZHEJIANG INSTOFSTANDARDIZATIONC15956617 ed without license from IHS IS015774:2017(E) COPYRIGHTPROTECTEDDOCUMENT IS02017,Published inSwitzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISOcopyrightoffice Ch. de Blandonnet 8. CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org Intematinaibr PrganizationfoStandardization Licensee-ZHEJIANG INSTOF STANDARDIZARoISQ0,7 - All rights reserved networking permited without license from IHS Notfor Resale, 2017/5/11 02:13:50 IS015774:2017(E) Contents Page Foreword ..iv 1 Scope 2 Normativereferences 3 Terms and definitions 4 Principle 5 Reagents. ..1 6 Apparatus. .2 7 Procedure. .3 7.1 General .3 7.2 Treatment of samples, vegetable oil and standards .3 7.3 Preparationofapparatus .3 7.4 Determination. .4 7.4.1 Graphite tube blank. .4 7.4.2 Vegetableoil. ..4 7.4.3 Calibration ofapparatus .4 7.4.4 Oil (liquid) samples. 7.4.5 Fat samples with melting point 40 °C and higher 4 7.4.6 Numberofdeterminations. .5 8 Expression of results ..5 9 Precision ..5 9.1 Interlaboratory test. .5 9.2 Repeatability ..5 9.3 Reproducibility .5 10 Test report .5 Annex A (informative) Results of interlaboratory test 6 iii See=ZHEJIANG INSTOFSTANDARDIZATION C15956617 vithoutlicense from IHS