ISO INTERNATIONAL STANDARD 16994 Second edition 2016-07-01 Solid biofuels Determination of total content of sulfur and chlorine Biocombustibles solides-Détermination de la teneur totale en soufreeten chlore Reference number IS0 16994:2016(E) ISO @IS02016 by IHS under lic No reproductic itted without license from IHS IS0 16994:2016(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 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 copyright@iso.org www.iso.org @ IS0 2016 - All rights reserved Noreproduc etworking permitted without license from IHS IS0 16994:2016(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. 2 Normative references 3 Terms and definitions 4 Principle ..2 4.1 General .2 4.2 Decomposition of the biofuel .2 4.3 Determination of sulfate and chloride in the decomposition solution .2 4.4 Automatic equipment. .2 5 Reagents ..3 6 Apparatus. .3 6.1 General .3 6.2 Method A 6.3 Method B 4 7 Preparation of the test sample .4 8 Procedure ..4 8.1 Decomposition. ..4 8.1.1 Method A: Combustion in a closed combustion vessel .4 8.1.2 Method B: Digestion in a closed vessel .5 8.1.3 Blanktest. .6 8.2 Detection methods. .6 8.2.1 Ion chromatography .6 8.2.2 Other detection methods .6 8.3 Calibration of the apparatus. ..6 8.4 Analyses of the decomposition solutions. .6 9 Expression of results .7 9.1 General. .7 9.2 Total chlorine .7 9.3 Total sulfur. 10 Performance characteristics .7 11 Test report. .8 Annex A (informative) Performance data ..9 Bibliography .11 iii ded by IHS under ense with ISt withoutlicense from IHS