ISO INTERNATIONAL STANDARD 15238 Second edition 2016-11-15 Solid mineral fuels Determination of total cadmium content of coal Combustibles minéraux solides - Dosage du cadmium total dans lecharbon Reference number A ISO 15238:2016(E) ISO International Organization for Standardization @IS02016 vided by IHS under itted without license from IHS IS0 15238:2016(E) COPYRIGHTPROTECTEDDOCUMENT IS0 2016, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISO copyrightoffice Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyright@iso.org www.iso.org Internatinair Prganization for Standardization Iby IHS unde etworking permitted without license from IHS IS0 15238:2016(E) Contents Page Foreword ..iv 1 Scope .1 2 Normative references ...1 3 Terms and definitions 4 Principle 5 Reagents. ..1 6 Apparatus .2 7 Preparation of sample ? 8 Procedure .3 8.1 Ashing of coal sample. ..3 8.2 Preparation of test solution .3 8.3 Preparation of blank solution .3 8.4 Graphite-furnace atomic absorption analysis .3 8.4.1 Calibration. 3 8.4.2 Measurement of standards 3 8.4.3 Measurement of test solution 4 8.4.4 Measurementofblanksolution 4 Expression of results 9 9.1 Ash content 4 9.2 Cadmium content. 4 10 Precision .5 10.1 Repeatability limit 5 10.2 Reproducibility critical difference .5 11 Test report 5 iii vided by IHS under lic without license from IHS