ISO INTERNATIONAL STANDARD 14403-2 First edition 2012-07-15 Water guality- Determination of total cyanide and free cyanide using flow analysis (FIA and CFA) - Part 2: Method using continuous flow analysis (CFA) Qualite de I'eau-Dosage des cyanures totaux et des cyanures libres par analyse en flux (FIA et CFA) - Partie 2: Méthode paranalyse en flux continu (CFA) Reference number ISO 14403-2:2012(E) SO @ ISO 2012 under license with ISO ISO 14403-2:2012(E) COPYRIGHTPROTECTEDDOCUMENT ISO 2012 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing 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 [email protected] Web www.iso.org Published in Switzerland ii Provided by IHS under license with ISO @ ISO 2012 -All rights reserved ISO 14403-2:2012(E) Contents Page Foreword ..iv Introduction 1 Scope 2 Normative references 3 Terms and definitions 4 Interferences... 4.1 Interferences by oxidizing agents.. 4.2 Interferences by sulfide, sulfite, nitrite and carbonyl compounds 4.3 Other interferences ... 5 Principle... 3 5.1 Determination of total cyanide 5.2 Determination of free cyanide.. 6 Reagents 3 7 Apparatus 8 Sampling and sample preparation.. 8 9 Procedure.. 9 9.1 Flow system set-up.... 9 9.2 Reagent blank measurement 9.3 Checking the suitability of the flow system 10 9.4 Calibration.... 10 9.5 Sample measurement. 10 Calculation 11 Expression of results 11 12 Test report 11 Annex A (informative) Examples of flow systems 13 Annex B (normative) Determination of the real cyanide concentration in the potassium cyanide solution ... 16 Annex C (informative) Example for the determination of total cyanide and free cyanide by continuous flow analysis (CFA) with gas diffusion and amperometric detection . Annex D (informative) Performance data, 19 Bibliography. 21 @ ISO 2012 - All rights reserved ili Provided by IHS under license with ISO