Diesel engines — NOx reduction agent AUS 32 — Part 2: Test methods

This document specifies test methods required for determination of the quality and chemical characteristics of NOx reduction agent AUS 32 (aqueous urea solution) as specified in ISO 22241-1.

Moteurs diesel — Agent AUS 32 de réduction des NOx — Partie 2: Méthodes d'essai

General Information

Status
Published
Publication Date
11-Feb-2019
Current Stage
9020 - International Standard under periodical review
Start Date
15-Jan-2024
Completion Date
15-Jan-2024
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ISO 22241-2:2019 - Diesel engines -- NOx reduction agent AUS 32
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INTERNATIONAL ISO
STANDARD 22241-2
Second edition
2019-02
Diesel engines — NOx reduction agent
AUS 32 —
Part 2:
Test methods
Moteurs diesel — Agent AUS 32 de réduction des NOx —
Partie 2: Méthodes d'essai
Reference number
ISO 22241-2:2019(E)
©
ISO 2019

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ISO 22241-2:2019(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2019
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.
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Published in Switzerland
ii © ISO 2019 – All rights reserved

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ISO 22241-2:2019(E)

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Specifications . 1
5 Sampling . 2
6 Precision and dispute . 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 .12
Annex E (normative) Determination of biuret content .15
Annex F (normative) Determination of aldehyde content .20
Annex G (normative) Determination of insoluble matter content by gravimetric method .24
Annex H (normative) Determination of phosphate content by photometric method .27
Annex I (normative) Determination of trace element content (Al, Ca, Cr, Cu, Fe, K, Mg, Na, Ni,
P and Zn) by ICP-OES method .33
Annex J (informative) Determination of identity by FTIR spectrometry method .41
Annex K (informative) Precision of test method .43
Bibliography .44
© ISO 2019 – All rights reserved iii

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ISO 22241-2:2019(E)

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of
...

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