ISO INTERNATIONAL STANDARD 17380 Secondedition 2013-06-15 Soil quality Determination of total cyanide and easily liberatable cyanide Continuous-flow analysis method Qualite du sol - Détermination des cyanures totaux et des cyanures aisément libérables - Méthode d'analyse en flux continu Reference number IS0 17380:2013(E) LSO @ IS0 2013 HS under Not for Resale IS0 17380:2013(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2013 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 Case postale 56:CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland @ IS0 2013 - All rights reserved No reproductic networking permited without license from IHS Not for Resale IS0 17380:2013(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. .1 2 Normative references ..1 3 Terms and definitions ..1 4 Principle 4.1 Pretreatment of soil samples. .2 4.2 Determination of total cyanide content. .2 4.3 Determination of easily-liberatable cyanide content .2 5 Reagents .2 5.1 General reagents. .2 5.2 Reagents for determination of cyanide. .3 5.3 Standard solutions for cyanide determination 4 6 Apparatus .6 6.1 Standard laboratory glassware and laboratory equipment .6 6.2 Continuous flow analysis system .6 6.3 Shaking machine. .7 7 Sampling, sample preparation and extraction 8 Working range .8 9 Procedure. 9.1 General ..8 9.2 Checking analysis system for correct function .8 9.3 Calibration graph .9 9.4 Measurement of samples .9 9.5 Cleaning of the analysis system ..10 10 Calculation of the cyanide content in the sample ..10 11 Precision .10 12 Test report ..11 Annex A (informative) Recovery and repeatability. ..12 Annex B (informative) Information on continuous flow automatic distillation apparatus ..14 Annex C (informative) Alternative distillation buffer (pH = 3,8) ..15 Bibliography ..16 iii Not for Resale