ISO INTERNATIONAL STANDARD 20295 First edition 2018-09 Soil quality Determination of perchlorate in soil using ion chromatography Qualité du sol - Determination du perchlorate des sols en utilisant la chromatographie ionique Reference number IS0 20295:2018(E) International Organization for Standardization Shenzhen Institute of Standards and Technology 9972181 @IS02018 IS0 20295:2018(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2018 All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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 CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Fax: +41 22 749 09 47 Email: [email protected] Website: www.iso.org Published in Switzerland Intenatinair prganization for Standardization ensee-Shenzhen Institute of Standards andeclS0log?&s- All rights reserved rious National Standards Bodies IS0 20295:2018(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. ..1 2 Normative references ..1 3 Terms and definitions 4 Principle .1 5 Interferences .2 6 Reagents ..2 7 Apparatus. .5 8 Procedure .5 8.1 Pre-treatments .5 8.2 Extraction .5 8.3 Ion chromatography .6 8.3.1 General .6 8.3.2 Calibration .6 8.3.3 Measurement of perchlorate .6 9 Quality control ..7 9.1 Performance of the separator column .7 9.2 Validity check of the calibration function ..8 10 Calculation ..8 11 Expression of results .8 12 Test report ..9 Annex A (informative) Example of ion chromatography conditions and the selection of extraction method .10 Annex B (informative) Results of interlaboratory validation study .13 Annex C (informative) Elimination of dissolved sulfate, chloride, hydrogen carbonate, carbonate and metals .17 Annex D (informative) Determination of perchlorate using inline matrix elimination and applying re-injection analysis .20 Annex E (informative) Determination of perchlorate using inline matrix elimination and concentration applying two dimensional ion chromatography (2D) .23 Bibliography .27 iii tandards and Technology 9972181