ISO INTERNATIONAL STANDARD 16968 First edition 2015-05-15 Solid biofuels Determination of minor elements Biocombustibles solides - Détermination des élements mineurs Reference number ISO 16968:2015(E) ISO International Organization for Standardization isee=Zhejang Institute of Standardization 5956617 @IS02015 vided by IHS under I No reproduction or networking permitted without license from IHS IS0 16968:2015(E) COPYRIGHT PROTECTED DOCUMENT IS0 2015, 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 [email protected] www.iso.org Not for Resale, 2015/8/7 03:22:50 No reproduction or networking permited without license from IHS IS0 16968:2015(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. ..1 2 Normative references 3 Terms and definitions ..1 4 Symbols and abbreviated terms ..2 4.1 Symbols .2 4.2 Abbreviated terms .2 5 Principle ..3 6 Reagents. 3 7 Apparatus 8 Preparation of the test sample ..4 9 Procedure. .4 9.1 Digestion. ..4 9.2 Detection methods. .5 9.3 Calibration of the apparatus. .5 9.4 Analysis of the digests .5 9.5 Blank test ..5 10 Calculations. .6 11 Performance characteristics ..6 12 Test report ..6 Annex A (informative) Performance data ..7 Bibliography .11 iii icensee=Zhejiang Institute of Standardization 5956617 vithout license from IHS