SIST EN ISO 14254:2018

Soil quality - Determination of exchangeable acidity using barium chloride solution as extractant (ISO 14254:2018)

ISO 14254:2018 specifies a method for the determination of exchangeable acidity in barium chloride extracts of soil samples obtained according to ISO 11260.
The procedure described herein mainly concerns the determination of total exchangeable acidity by means of a fixed pH end point titration.
Two additional and optional procedures are given, describing respectively, determinations of free H+ acidity and aluminium in the extracts.
ISO 14254:2018 is applicable to all types of air dry soil samples.

Bodenbeschaffenheit - Bestimmung der Austauschacidität unter Verwendung einer Bariumchloridlösung als Extraktionsmittel (ISO 14254:2018)

Dieses Dokument legt ein Verfahren zur Bestimmung der Austauschacidität in Bariumchloridextrakten von Bodenproben fest, die nach ISO 11260 gewonnen wurden.
Das beschriebene Verfahren beinhaltet hauptsächlich die Bestimmung der austauschbaren Gesamtacidität mittels einer Titration bis zu einem festgelegten pH Endpunkt.
Es werden jedoch zwei zusätzliche und fakultative Verfahren angegeben, die zum einen die Bestimmung der freien H+ Acidität und zum anderen des Aluminiums in den Extrakten beschreiben.
Dieses Dokument ist auf alle Arten lufttrockenen Bodenprobens anwendbar.

Qualité du sol - Détermination de l'acidité échangeable dans des extraits au chlorure de baryum (ISO 14254:2018)

L'ISO 14254:2018 spécifie une méthode permettant de déterminer l'acidité échangeable des extraits au chlorure de baryum d'échantillons de sol obtenus selon l'ISO 11260.
Le mode opératoire décrit ci-après concerne principalement la détermination de l'acidité échangeable totale au moyen d'un titrage dont le point de fin est une valeur de pH fixe.
Deux autres modes opératoires facultatifs sont également décrits, portant respectivement sur la détermination de l'acidité due aux protons (H+) échangeables et de la teneur en aluminium des extraits.
L'ISO 14254:2018 est applicable à tous les types d'échantillons de sol séchés à l'air.

Kakovost tal - Določevanje izmenljive kislosti po ekstrakciji z raztopino barijevega klorida (ISO 14254:2018)

Ta dokument določa metodo za določevanje izmenljive kislosti vzorcev tal,
pridobljenih v skladu s standardom ISO 11260, po ekstrakciji z barijevim kloridom.
Postopek, opisan v tem dokumentu, se nanaša predvsem na ugotavljanje skupne izmenljive kislosti
z uporabo titracije z ekvivalentno točko s fiksnim pH.
Podana sta dva dodatna in izbirna postopka, ki opisujeta določevanje proste kislosti H+
in aluminija v ekstraktih.
Ta dokument se uporablja za vse vrste vzorcev tal, posušenih na zraku.

General Information

• Status: Published
• Public Enquiry End Date: 24-May-2017
• Publication Date: 12-Jun-2018
• ICS: 13.080.10 - Chemical characteristics of soils
• Technical Committee: KAT - Soil quality
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Jun-2018
• Due Date: 06-Aug-2018
• Completion Date: 13-Jun-2018
• Directive: 2019-01-2991 - Pravilnik o monitoringu kakovosti tal
• Directive: TP255 - Pravilnik o obratovalnem monitoringu stanja tal
• Ref Project: EN ISO 14254:2018 - Soil quality - Determination of exchangeable acidity using barium chloride solution as extractant (ISO 14254:2018)

Relations

• Replaces: SIST ISO 14254:2006 - Soil quality - Determination of exchangeable acidity in barium chloride extracts
• Effective Date: 01-Jul-2018
• Replaces: SIST EN ISO 14254:2011 - Soil quality - Determination of exchangeable acidity in barium chloride extracts (ISO 14254:2001)
• Effective Date: 01-Jul-2018

Overview

EN ISO 14254:2018 (ISO 14254:2018) is an international test method for assessing soil quality by measuring exchangeable acidity in soils extracted with a barium chloride solution. The standard specifies a laboratory procedure-mainly a fixed pH end point titration-to determine total exchangeable acidity in barium chloride extracts prepared according to ISO 11260. It is applicable to all types of air-dry soil samples and includes optional steps for determining free H+ acidity and aluminium in the extracts.

Key topics

• Scope and principle
  • Extraction of air-dry soil using a 0.1 mol/l barium chloride solution (as per ISO 11260).
  • Main determination: titration of the extract with NaOH to a fixed end point pH = 7.8 (or using phenolphthalein indicator when specified).
• Optional determinations
  • Free H+ acidity: add sodium fluoride (NaF) to complex aluminium and isolate proton acidity.
  • Aluminium quantification: by flame atomic absorption spectrometry (AAS) or inductively coupled plasma atomic emission spectrometry (ICP-AES).
• Reagents and calibration
  • Use analytical-grade reagents and low-conductivity water; detailed reagent recipes and calibration solutions are specified.
  • pH-meter calibration with buffer solutions and regular standardization of titrants (NaOH) are required.
• Apparatus and procedure
  • Required equipment includes pH-meter with automatic temperature compensation, burettes (≤0.05 ml), magnetic stirrers; automatic titrimeters are allowed.
  • Procedure sections cover sample pretreatment, water content determination, extraction, titration, calculations and test reporting.
• Limitations and notes
  • The fixed pH end point method is not specific to individual acid species; the pH 7.8 end point is intended to precipitate Al3+ but may include weak organic acids.

Applications

• Routine laboratory measurement of soil acidity for:
  • Environmental characterization and monitoring
  • Agricultural soil fertility assessment and lime requirement estimation
  • Land remediation and regulatory compliance testing
  • Research into soil chemical properties and cation exchange processes
• Typical users: environmental testing labs, soil science researchers, agronomists, land managers, regulators and consultants who require standardized, traceable acidity data.

Related standards

• ISO 11260 - Preparation/extraction protocol (effective cation exchange capacity/base saturation using barium chloride)
• ISO 11464 - Sample pretreatment for physico-chemical analysis
• ISO 11465 - Gravimetric determination of dry matter and water content
• ISO 22036 - Determination of trace elements in extracts by ICP-AES

EN ISO 14254:2018 provides a standardized, reproducible method for quantifying exchangeable acidity in soils - a key parameter for soil quality assessment and agronomic decision-making.

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2018
1DGRPHãþD
SIST EN ISO 14254:2011
SIST ISO 14254:2006
.DNRYRVWWDO'RORþHYDQMHL]PHQOMLYHNLVORVWLSRHNVWUDNFLML]UD]WRSLQREDULMHYHJD
NORULGD,62
Soil quality - Determination of exchangeable acidity using barium chloride solution as
extractant (ISO 14254:2018)
Bodenbeschaffenheit - Bestimmung der Austauschacidität unter Verwendung einer
Bariumchloridlösung als Extraktionsmittel (ISO 14254:2018)
Qualité du sol - Détermination de l'acidité échangeable dans des extraits au chlorure de
baryum (ISO 14254:2018)
Ta slovenski standard je istoveten z: EN ISO 14254:2018
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 14254
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2018
EUROPÄISCHE NORM
ICS 13.080.10 Supersedes EN ISO 14254:2011
English Version
Soil quality - Determination of exchangeable acidity using
barium chloride solution as extractant (ISO 14254:2018)
Qualité du sol - Détermination de l'acidité échangeable Bodenbeschaffenheit - Bestimmung der
dans des extraits au chlorure de baryum (ISO Austauschacidität unter Verwendung einer
14254:2018) Bariumchloridlösung als Extraktionsmittel (ISO
14254:2018)
This European Standard was approved by CEN on 19 March 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 14254:2018 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 14254:2018) 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 November 2018, and conflicting national standards
shall be withdrawn at the latest by November 2018.
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 14254:2011.
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 14254:2018 has been approved by CEN as EN ISO 14254:2018 without any modification.

INTERNATIONAL ISO
STANDARD 14254
Second edition
2018-04
Soil quality — Determination of
exchangeable acidity using barium
chloride solution as extractant
Qualité du sol — Détermination de l'acidité échangeable dans des
extraits au chlorure de baryum
Reference number
ISO 14254:2018(E)
©
ISO 2018
ISO 14254:2018(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: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved

ISO 14254:2018(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Reagents . 2
6 Apparatus and glassware . 4
7 Samples . 4
7.1 Sample pretreatment . 4
7.2 Determination of water content. 4
8 Procedure. 4
9 Calculations. 5
10 Test report . 6
ISO 14254:2018(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.
The committee responsible for this document is ISO/TC 190, Soil quality, Subcommittee SC 3, Chemical
methods and soil characteristics.
This second edition cancels and replaces the first edition (ISO 14254:2001), which has been technically
revised.
iv © ISO 2018 – All rights reserved

INTERNATIONAL STANDARD ISO 14254:2018(E)
Soil quality — Determination of exchangeable acidity using
barium chloride solution as extractant
WARNING — Persons using this document should be familiar with normal laboratory practice.
This document does not purport to address all of the safety problems, if any, associated with its
use. It is the responsibility of the user to establish appropriate safety and health practices and to
ensure compliance with any national regulatory conditions.
IMPORTANT — It is absolutely essential that tests, conducted in accordance with this document,
be carried out by suitably qualified staff.
1 Scope
This document specifies a method for the determination of exchangeable acidity in barium chloride
extracts of soil samples obtained according to ISO 11260.
The procedure described herein mainly concerns the determination of total exchangeable acidity by
means of a fixed pH end point titration.
+
Two additional and optional procedures are given, describing respectively, determinations of free H
ac
...