ISO INTERNATIONAL STANDARD 22241-2 Second edition 2019-02 Diesel engines NOx reduction agent AUS32- Part 2: Test methods Moteurs diesel-Agent AUS32 de reduction des NOx- Partie2:Methodesd'essai Reference number IS022241-2:2019(E) ISO @IS0 2019 IS022241-2:2019(E) COPYRIGHTPROTECTEDDOCUMENT @ISO2019 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 orIso's memberbody in the countryof therequester. ISO copyright office CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone:+41227490111 Fax:+4122749 09 47 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2019- All rights reserved IS022241-2:2019(E) Contents Page Foreword ..iv 1 Scope .1 2 Normative references 3 Terms and definitions ..1 4 Specifications .1 5 Sampling. ..2 6 Precision and dispute .2 AnnexA (normative) Sampling ..3 AnnexB (normative)Determinationofureacontentbytotalnitrogen .5 Annex C (normative) Refractive index and determination of urea content by refractive index. .9 AnnexD(normative)Determinationofalkalinity .12 AnnexE (normative)Determination ofbiuretcontent ..15 AnnexF (normative)Determinationofaldehydecontent .20 AnnexG (normative)Determination of insoluble matter content bygravimetric method ..24 AnnexH(normative)Determinationofphosphatecontentbyphotometricmethod ..27 AnnexI (normative)Determination of traceelementcontent (Al, Ca, Cr, Cu,Fe,K, Mg, Na, Ni, PandZn)byICP-OESmethod. .33 AnnexJ(informative)DeterminationofidentitybyFTIRspectrometrymethod .41 Annex K (informative) Precision of test method .43 Bibliography .44 @ IS0 2019 -All rights reserved iii