ISO/TS 22171:2023

Soil quality — Determination of potential cation exchange capacity (CEC) and exchangeable cations buffered at pH 7, using a molar ammonium acetate solution

This document specifies a method for the determination of potential cation exchange capacity (CEC) and the content of exchangeable cations (Ca, K, Mg, Na) in soils using a molar ammonium acetate solution buffered at pH 7 as extractant. This document is applicable to all types of air-dry soil samples which have been prepared, for example, according to ISO 11464.

Qualité du sol — Détermination de la capacité d'échange cationique (CEC) potentielle et de la teneur en cations échangeables, à l'aide d'une solution molaire d'acétate d'ammonium tamponnée à pH 7

Le présent document spécifie une méthode de détermination de la capacité d’échange cationique (CEC) potentielle et de la teneur en cations échangeables (Ca, K, Mg, Na) dans le sol, à l’aide d’une solution molaire d’acétate d’ammonium tamponnée à pH 7 utilisée comme réactif d’extraction. Le présent document est applicable à tous les types d’échantillons de sol séchés à l’air qui ont été préparés, par exemple, conformément à l’ISO 11464.

Kakovost tal - Določanje potencialne kationske izmenjalne kapacitete (CEC) in izmenljivih kationov z uporabo pufrske raztopine amonijevega acetata s pH 7

General Information

• Status: Published
• Publication Date: 03-Dec-2023
• ICS: 13.080.10 - Chemical characteristics of soils
• Technical Committee: ISO/TC 190/SC 3 - Chemical and physical characterization
• Drafting Committee: ISO/TC 190/SC 3/WG 14 - Physical methods
• Current Stage: 6060 - International Standard published
• Start Date: 04-Dec-2023
• Due Date: 15-Jul-2023
• Completion Date: 04-Dec-2023
• Ref Project: oSIST ISO/DIS 22171:2023 - Soil quality - Determination of potential cation exchange capacity (CEC) and exchangeable cations buffered at pH 7, using a molar ammonium acetate solution

Standards Content (Sample)

TECHNICAL ISO/TS
SPECIFICATION 22171
First edition
2023-12
Soil quality — Determination of
potential cation exchange capacity
(CEC) and exchangeable cations
buffered at pH 7, using a molar
ammonium acetate solution
Qualité du sol — Détermination de la capacité d'échange cationique
(CEC) potentielle et de la teneur en cations échangeables, à l'aide
d'une solution molaire d'acétate d'ammonium tamponnée à pH 7
Reference number
ISO/TS 22171:2023(E)
© ISO 2023

---------------------- Page: 1 ----------------------
ISO/TS 22171:2023(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
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: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
  © ISO 2023 – All rights reserved

---------------------- Page: 2 ----------------------
ISO/TS 22171:2023(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagents . 1
6 Apparatus . 3
7 Laboratory samples .4
8 Procedure .4
8.1 Test portion . 4
8.2 Extraction step . 4
8.3 Ammoniacal nitrogen assay by continuous flow spectrophotometry . 5
8.3.1 Apparatus set-up . 5
8.3.2 Assays . . 6
8.4 Expression of results . 7
9 Test report . 7
Bibliography .
...

SPÉCIFICATION ISO/TS
TECHNIQUE 22171
Première édition
2023-12
Qualité du sol — Détermination de la
capacité d'échange cationique (CEC)
potentielle et de la teneur en cations
échangeables, à l'aide d'une solution
molaire d'acétate d'ammonium
tamponnée à pH 7
Soil quality — Determination of potential cation exchange capacity
(CEC) and exchangeable cations buffered at pH 7, using a molar
ammonium acetate solution
Numéro de référence
ISO/TS 22171:2023(F)
© ISO 2023

---------------------- Page: 1 ----------------------
ISO/TS 22171:2023(F)
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2023
Tous droits réservés. Sauf prescription différente ou nécessité dans le contexte de sa mise en œuvre, aucune partie de cette
publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique,
y compris la photocopie, ou la diffusion sur l’internet ou sur un intranet, sans autorisation écrite préalable. Une autorisation peut
être demandée à l’ISO à l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
ISO copyright office
Case postale 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Genève
Tél.: [phone]
E-mail: [e-mail]
Web: www.iso.org
Publié en Suisse
ii
  © ISO 2023 – Tous droits réservés

---------------------- Page: 2 ----------------------
ISO/TS 22171:2023(F)
Sommaire Page
Avant-propos .iv
Introduction .v
1 Domaine d’application . 1
2 Références normatives .1
3 Termes et définitions . 1
4 Principe. 1
5 Réactifs . 1
6 Appareillage . 3
7 Échantillons pour laboratoire .4
8 Mode opératoire . 4
8.1 Prise d’essai . 4
8.2 Étape d’extraction . 5
8.3 Détermination de la teneur en azote ammoniacal par spectrophotométrie à flux
continu . 5
8.3.1 Réglage de l’appareil . 5
8.3.2 Déterminations . 6
8.4 Expression des résultats . 7
9 Rapport d’essai .
...

SLOVENSKI STANDARD
oSIST ISO/DIS 22171:2023
01-junij-2023
Kakovost tal - Določanje potencialne kationske izmenjalne kapacitete (CEC) in
izmenljivih kationov z uporabo pufrske raztopine amonijevega acetata s pH 7
Soil quality - Determination of potential cation exchange capacity (CEC) and
exchangeable cations buffered at pH 7, using a molar ammonium acetate solution
Qualité du sol - Détermination de la capacité d'échange cationique (CEC) potentielle et
de la teneur en cations échangeables, à l'aide d'une solution molaire d'acétate
d'ammonium tamponnée à pH 7
Ta slovenski standard je istoveten z: ISO/DIS 22171
ICS:
13.080.10 Kemijske značilnosti tal Chemical characteristics of
soils
oSIST ISO/DIS 22171:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST ISO/DIS 22171:2023

---------------------- Page: 2 ----------------------
oSIST ISO/DIS 22171:2023
DRAFT INTERNATIONAL STANDARD
ISO/DIS 22171
ISO/TC 190/SC 3 Secretariat: DIN
Voting begins on: Voting terminates on:
2022-02-17 2022-05-12
Soil quality — Determination of potential cation exchange
capacity (CEC) and exchangeable cations buffered at pH 7,
using a molar ammonium acetate solution
ICS: 13.080.10
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
This document is circulated as received from the committee secretariat.
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 22171:2022(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2022

---------------------- Page: 3 ----------------------
oSIST ISO/DIS 22171:2023
ISO/DIS 22171:2022(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2022
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: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
  © ISO 2022 – All rights reserved

---------------------- Page: 4 ----------------------
oSIST ISO/DIS 22171:2023
ISO/DIS 22171:2022(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagents . 1
6 Apparatus . 3
7 Laboratory samples .
...

FINAL
TECHNICAL ISO/DTS
DRAFT
SPECIFICATION 22171
ISO/TC 190/SC 3
Soil quality — Determination of
Secretariat: DIN
potential cation exchange capacity
Voting begins on:
2023-09-15 (CEC) and exchangeable cations
buffered at pH 7, using a molar
Voting terminates on:
2023-11-10
ammonium acetate solution
Qualité du sol — Détermination de la capacité d'échange cationique
(CEC) potentielle et de la teneur en cations échangeables, à l'aide
d'une solution molaire d'acétate d'ammonium tamponnée à pH 7
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/DTS 22171:2023(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. © ISO 2023

---------------------- Page: 1 ----------------------
ISO/DTS 22171:2023(E)
FINAL
TECHNICAL ISO/DTS
DRAFT
SPECIFICATION 22171
ISO/TC 190/SC 3
Soil quality — Determination of
Secretariat: DIN
potential cation exchange capacity
Voting begins on:
(CEC) and exchangeable cations
buffered at pH 7, using a molar
Voting terminates on:
ammonium acetate solution
Qualité du sol — Détermination de la capacité d'échange cationique
(CEC) potentielle et de la teneur en cations échangeables, à l'aide
d'une solution molaire d'acétate d'ammonium tamponnée à pH 7
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
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.
RECIPIENTS OF THIS DRAFT ARE INVITED TO
ISO copyright office
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
CP 401 • Ch. de Blandonnet 8
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
CH-1214 Vernier, Geneva
DOCUMENTATION.
Phone: [phone]
IN ADDITION TO THEIR EVALUATION AS
Reference number
Email: [e-mail]
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/DTS 22171:2023(E)
Website: www.iso.org
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
Published in Switzerland
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN­
DARDS TO WHICH REFERENCE MAY BE MADE IN
ii
  © ISO 2023 – All rights reserved
NATIONAL REGULATIONS. © ISO 2023

---------------------- Page: 2 ----------------------
ISO/DTS 22171:2023(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
5 Reagents . 1
6 Apparatus . 3
7 Laboratory samples .4
8 Procedure .4
8.1 Test portion .
...

ISO/DTS 22171
ISO/TC 190/SC 3
Date: 2022-07-11
ISO/TS 22171:2023(E)
ISO/TC 190/SC 3/WG 14
Secretariat: DIN
Date: 2023-08-31
Soil quality — Determination of potential cation exchange
capacity (CEC) and exchangeable cations buffered at pH 7, using a
molar ammonium acetate solution
Qualité du sol — DeterminationDétermination de la capacité d'échange cationique (CEC) potentielle (CEC)
et desde la teneur en cations échangeables par une, à l'aide d'une solution molaire d'acétate d'ammonium
molaire tamponnée à pH 7
DTS stage

---------------------- Page: 1 ----------------------
ISO/TS DTS 22171:2023(:(E)
© ISO 20222023
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'sISO’s member body in the country of the requester.
ISO Copyright Office copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
Email: E-mail: [e-mail]
Website: www.iso.org
Published in Switzerland.
ii © ISO 2023 – All rights reserved

---------------------- Page: 2 ----------------------
ISO/TS DTS 22171:2023(:(E)
Contents Page
Foreword . iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Reagents . 1
5 Apparatus . 3
6 Laboratory samples . 5
7 Procedure . 5
7.1 Test portion . 5
7.2 Extraction step . 5
7.3 Ammoniacal nitrogen assay by continuous flow spectrophotometry . 5
7.3.1 Apparatus set-up . 5
7.3.2 Assays . 7
7.4 Expression of results . 7
8 Test report . 8
Bibliography . 9

© ISO 2023 – All rights reserved iii

---------------------- Page: 3 ----------------------
ISO/TS DTS 22171:2023(:(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
...