ISO INTERNATIONAL STANDARD 18611-2 First edition 2014-10-01 Ships and marine technology Marine NOx reduction agent AUS 40 - Part 2: Test methods Navires et technologie marine - Agents reducteurs NOx marins AUS 40- Partie 2: Méthodes d'essai Reference number ISO 18611-2:2014(E) ISO CopyrhematioaOrganizationforStandadizatio @IS02014 Not for Resale IS0 18611-2:2014(E) COPYRIGHT PROTECTED DOCUMENT @ISO2014 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form 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 +4122 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @ IS0 2014 - All rights reserved Not for Resale IS0 18611-2:2014(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. ..1 2 Normative references ..1 3 Specifications 4 Sampling. ..1 5 Precision and dispute .2 5.1 General. .2 5.2 Repeatability, r .2 5.3 Reproducibility, R. .2 Annex A (normative) Sampling .3 Annex B (normative) Determination of urea content by total nitrogen ..5 Annex C (normative) Refractive index and determination of urea content by refractive index ..9 Annex D (normative) Determination of alkalinity ..13 Annex E (normative) Determination of biuret content ..16 Annex F (normative) Determination of aldehyde content ..21 Annex G (normative) Determination of insoluble matter content by gravimetric method ..25 Annex H (normative) Determination of phosphate content by photometric method ..28 Annex I (normative) Determination of trace element content (Ca, Fe, K, Mg, Na) by ICP- OES method .34 Annex J (informative) Determination of identity by FTIR spectrometry method ..40 Annex K (informative) Precision of test methods ..43 Bibliography ..44 ii lout license from IHS Not for Resale