EN ISO 23470:2018

SLOVENSKI STANDARD
01-december-2018
1DGRPHãþD
SIST EN ISO 23470:2011
.DNRYRVWWDO'RORþHYDQMHHIHNWLYQHNDWLRQVNHL]PHQMDOQHNDSDFLWHWHLQL]PHQOMLYLK
NDWLRQRY]XSRUDERUD]WRSLQHKHNVDPLQRNREDOWRYHJDWULNORULGD,62
Soil quality - Determination of effective cation exchange capacity (CEC) and
exchangeable cations using a hexamminecobalt trichloride solution (ISO 23470:2018)
Bodenbeschaffenheit - Bestimmung der effektiven Kationenaustauschkapazität (KAK)
und der austauschbaren Kationen mit Hexammincobalt(III)chlorid-Lösung (ISO
23470:2018)
Qualité du sol - Détermination de la capacité d'échange cationique (CEC) effective et
des cations échangeables à l'aide d'une solution de trichlorure de cobaltihexammine
(ISO 23470:2018)
Ta slovenski standard je istoveten z: EN ISO 23470:2018
ICS:
13.080.10 .HPLMVNH]QDþLOQRVWLWDO Chemical characteristics of
soils
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 23470
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2018
EUROPÄISCHE NORM
ICS 13.080.20 Supersedes EN ISO 23470:2011
English Version
Soil quality - Determination of effective cation exchange
capacity (CEC) and exchangeable cations using a
hexamminecobalt trichloride solution (ISO 23470:2018)
Qualité du sol - Détermination de la capacité d'échange Bodenbeschaffenheit - Bestimmung der effektiven
cationique (CEC) effective et des cations échangeables Kationenaustauschkapazität (KAK) und der
à l'aide d'une solution de trichlorure de austauschbaren Kationen mit Hexammincobalt-
cobaltihexammine (ISO 23470:2018) trichlorid-Lösung (ISO 23470:2018)
This European Standard was approved by CEN on 10 September 2018.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 23470:2018 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 23470:2018) has been prepared by Technical Committee ISO/TC 190 "Soil
quality" in collaboration with Technical Committee CEN/TC 444 “Test methods for environmental
characterization of solid matrices” the secretariat of which is held by NEN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by April 2019, and conflicting national standards shall be
withdrawn at the latest by April 2019.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 23470:2011.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 23470:2018 has been approved by CEN as EN ISO 23470:2018 without any modification.

INTERNATIONAL ISO
STANDARD 23470
Second edition
2018-09
Soil quality — Determination of
effective cation exchange capacity
(CEC) and exchangeable cations using
a hexamminecobalt(III)chloride
solution
Qualité du sol — Détermination de la capacité d'échange cationique
(CEC) effective et des cations échangeables à l'aide d'une solution de
trichlorure de cobaltihexammine
Reference number
ISO 23470:2018(E)
©
ISO 2018
ISO 23470:2018(E)
© ISO 2018
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.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved

ISO 23470:2018(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagents . 2
6 Apparatus . 3
7 Procedure. 4
7.1 Test portion . 4
7.2 Exchange reaction . 4
7.3 Determination of CEC . 4
7.3.1 General. 4
7.3.2 Determination of ammonia nitrogen by distillation . 4
7.3.3 Spectrophotometric determination . 5
7.3.4 Spectrometric determination of cobalt . 7
7.4 Determination of cobalt and exchangeable cations . 7
7.4.1 General. 7
7.4.2 Standard solutions for exchangeable cations . 8
7.4.3 Standard solutions for cobalt . 8
7.4.4 Spectrometric determination of exchangeable cations . 9
7.4.5 Spectrometric determination of cobalt . 9
7.4.6 Calculation of exchangeable cations . 9
8 Test report .10
9 Validation .10
Annex A (informative) Comparison of different methods for the determination of effective CEC .11
Annex B (informative) Results of the interlaboratory comparison for extraction with
hexamminecobalt(III)chloride .15
Annex C (informative) Results of the interlaboratory comparison for extraction with calcite
saturated hexamminecobalt(III)chloride solution .17
Annex D (informative) Carbonate and sulfate field model .18
Annex E (informative) Effect of minimization of Ca errors by calcite saturation of
hexamminecobalt .20
Bibliography .22
ISO 23470:2018(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: www .iso .org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 190, Soil quality,
...