ISO INTERNATIONAL STANDARD 18400-201 First edition 2017-01 Soil quality - Sampling Part 201: Physical pretreatment in the field Qualité du sol - Echantillonnage - Partie 201: Pretraitement physique sur le terrain Reference number IS0 18400-201:2017(E) International Organization for Standardization See=ZHEJIANG INST OF STANDARDIZATION C1 5956617 @ IS0 2017 mitted without license from IHS IS0 18400-201:2017(E) COPYRIGHT PROTECTEDDOCUMENT IS0 2017, 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. ISO copyright office 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 Licensee-ZHEJIANG INST OF STANDARDIZAISQ 07 - All rights reserved Not for Resale, 2017/3/28 02:55:42 networking permited without license from IHS IS0 18400-201:2017(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. ..1 2 Normative references 3 Terms and definitions 4 Preliminary considerations 5 Incorporation in the sampling plan. .5 6 General requirements 7 Safety .6 8 Homogenization 1 9 Subsampling ..7 9.1 General 9.2 Equipment for subsampling 7 9.3 Minimumsizeofthesubsample ..8 9.4 Procedure for macro-aggregate reduction by hand .9 9.5 Subsampling methods .9 9.5.1 General .9 9.5.2 Long pile and alternate shovel method 10 9.5.3 Coning and quartering .11 9.5.4 Riffling. .12 9.5.5 Application of Tyler divider ..12 9.5.6 Application of mechanized turntable (rotating divider) .13 9.6 Selective subsampling based on the particle size 13 9.6.1 General .13 9.6.2 Sieving ..14 9.6.3 Hand picking. ..14 10 Forming composite samples ..15 10.1 General ..15 10.2 Minimum size of increments or subsamples .16 10.3 Production of composite samples .16 10.3.1 Composite sample based on incremental sampling ..16 10.3.2 Composite sample based on parts of individual samples .16 11 Packaging and storage ..16 12 Reporting. ..16 Annex A (informative) Illustrations of apparatus ..18 Bibliography .21 ii icensee=ZHEJIANG INST OF STANDARDIZATION C1 5956617 ed without license from IHS