ISO 22241-2:2019

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
• ICS: 43.060.40 - Fuel systems
• Technical Committee: ISO/TC 22/SC 34 - Propulsion, powertrain and powertrain fluids
• Drafting Committee: ISO/TC 22/SC 34/WG 14 - NOx reduction additive
• Current Stage: 9060 - Close of review
• Start Date: 02-Sep-2029

Relations

• Revises: ISO 22241-2:2006 - Diesel engines — NOx reduction agent AUS 32 — Part 2: Test methods
• Effective Date: 19-Apr-2014

Standards Content (Sample)

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
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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
...