ISO INTERNATIONAL STANDARD 14780 First edition 2017-04 Solid biofuels Sample preparation Biocombustibles solides - Préparation des échantillons Reference number IS0 14780:2017(E) so International Organization for Standardization @ IS0 2017 e=ZHEJIANG INST OF STANDARDIZATION C15956617 vided by IHS under lic Not for Resale, 2017/8/21 01:22:47 itted without license from IHS IS0 14780:2017(E) COPYRIGHTPROTECTEDDOCUMENT IS02017,PublishedinSwitzerland 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. ISO copyright office Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel.+41 22 749 01 11 Fax +41227490947 copyright@iso.org www.iso.org Intenationai br PrganizationforStandardization icensee-ZHEJIANG INST OF STANDARDIZRoISQ s1.7 - All rights reserved I by IHS unde Not for Resale, 2017/8/21 01:22:47 etworking permitted without license from IHS IS0 14780:2017(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. ..1 2 Normative references ..1 3 Terms and definitions 4 Symbols. ..2 5 Principles of correct sample reduction .2 6 Apparatus .2 6.1 Apparatus for sample division. .2 6.1.1 General .2 6.1.2 Riffle boxes 2 6.1.3 Rotary sample dividers .3 6.1.4 Shovels and scoops 4 6.2 Apparatus for particle size-reduction. .5 6.2.1 Coarse cutting mill or wood crusher 5 6.2.2 Cutting mill .5 6.2.3 Axe .6 6.2.4 Hand saw. . 6 6.2.5 Sieves .6 6.2.6 Balance. .6 7 Sample reduction -( General principles ..6 8 Methods for sample division. ..8 8.1 General. .8 8.2 Riffling. .9 8.3 Strip mixing .9 8.4 Long pile-alternate shovel method .9 8.5 Rotary divider. .10 8.6 Coning and quartering. .10 8.7 Mass reducing straw-like material (handful sampling) 10 Method for reducing laboratory samples to sub-samples and general analysis samples....11 9.1 Mixing 11 9.2 Initial sample division 11 9.3 Pre-drying .11 9.4 Coarse cutting (particle size reduction to <31,5 mm) .12 9.5 Sample division of <31,5 mm material. .12 9.6 Particle size reduction of <31,5 mm material to <1 mm ..12 9.7 Sample division of <1 mm material ..13 9.8 Particlesizereductionof<1mmmaterialto<0,25mm ..13 10 Storage and labelling. .13 11 Performance characteristics ..13 Annex A (informative) Precision in relation to division method ..14 Annex B (informative) Scheme of sample preparation for samples from single delivery ..19 Annex C (informative) Scheme of sample preparation for samples from continuous delivery ...0. Bibliography .22 iii ee=ZHEJIANG INST OF STANDARDIZATION C1 5956617 ed without license from IHS