EN ISO 10390:2022

Soil, treated biowaste and sludge - Determination of pH (ISO 10390:2021)

This document specifies an instrumental method for the routine determination of pH within the range pH 2 to pH 12 using a glass electrode in a 1:5 (volume fraction) suspension of soil, sludge and treated biowaste in either water (pH in H2O), in 1 mol/l potassium chloride solution (pH in KCl) or in 0,01 mol/l calcium chloride solution (pH in CaCl2).
This document is applicable to all types of air-dried soil and treated biowaste samples.
NOTE       For example, pretreated in accordance with ISO 11464 or EN 16179 or EN 15002.

Boden, behandelter Bioabfall und Schlamm - Bestimmung des pH-Werts (ISO 10390:2021)

Dieses Dokument legt ein instrumentelles Verfahren zur routinemäßigen Bestimmung des pH Werts innerhalb des Bereichs pH = 2 bis pH = 12 fest, bei dem eine Glaselektrode in einer Suspension von Boden, Schlamm und behandeltem Bioabfall in entweder Wasser (pH Wert in H2O), in einer 1 mol/l Kaliumchloridlösung (pH Wert in KCl) oder in einer 0,01 mol/l Calciumchloridlösung (pH Wert in CaCl2), jeweils im Volumenverhältnis 1 : 5, verwendet wird.
Dieses Dokument gilt für alle Arten luftgetrockneter Bodenproben und behandelten Bioabfallproben.
ANMERKUNG   Zum Beispiel vorbehandelt nach ISO 11464 oder EN 16179 oder EN 15002.

Sols, biodéchets traités et boues - Détermination du pH (ISO 10390:2021)

Le présent document spécifie une méthode instrumentale de détermination de routine du pH dans le domaine de pH compris entre 2 et 12 à l’aide d’une électrode en verre dans une suspension de sol, de boues et de biodéchets traités diluée à 1: 5 (fraction volumique) soit dans de l’eau (pH dans H2O), soit dans une solution de chlorure de potassium à 1 mol/l (pH dans KCl) ou dans une solution de chlorure de calcium à 0,01 mol/l (pH dans CaCl2).
Le présent document s’applique à tous les types d’échantillons de sol et de biodéchets traités séchés à l’air.
NOTE            Par exemple, prétraités conformément à l’ISO 11464, l’EN 16179 ou l’EN 15002.

Tla, obdelani biološki odpadki in blato - Določevanje pH-vrednosti (ISO 10390:2021)

Ta dokument določa instrumentalno metodo za rutinsko določevanje vrednosti pH v razponu od pH 2 do pH 12 z uporabo steklene elektrode v suspenziji 1 : 5 (prostorninski delež) tal, blata in predelanih bioloških odpadkov v vodi (pH v H2O), v raztopini kalijevega klorida (pH v KCl) 1 mol/l ali v raztopini kalcijevega klorida (pH v CaCl2) 0,01 mol/l.
Ta mednarodni standard se uporablja za vse vrste tal, blata in bioloških odpadkov, ki so na primer
predhodno obdelane v skladu s standardom ISO 11464 ali EN 16179.

General Information

• Status: Published
• Publication Date: 15-Mar-2022
• Withdrawal Date: 29-Sep-2022
• ICS: 13.080.10 - Chemical characteristics of soils
• Technical Committee: CEN/TC 444 - Environmental characterization
• Drafting Committee: CEN/TC 444/WG 5 - Physical tests
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 16-Mar-2022
• Completion Date: 16-Mar-2022
• Ref Project: SIST EN ISO 10390:2022 - Soil, treated biowaste and sludge - Determination of pH (ISO 10390:2021)

Relations

• Replaces: EN 15933:2012 - Sludge, treated biowaste and soil - Determination of pH
• Effective Date: 23-Mar-2022

Overview

EN ISO 10390:2022 / ISO 10390:2021 defines a routine instrumental method for the determination of pH in soils, treated biowaste and sludge. The standard covers measurements in the range pH 2 to pH 12 using a glass electrode and a 1:5 (volume/volume) suspension of sample in either water (pH in H2O), 1 mol·L⁻¹ KCl (pH in KCl) or 0.01 mol·L⁻¹ CaCl2 (pH in CaCl2). It is applicable to all types of air-dried soil and treated biowaste samples and includes provisions for sludges and field-moist samples.

Key topics and requirements

• Sample preparation
  • Use air-dried (or dried ≤40 °C) samples sieved to 2 mm; treated biowaste may be measured without pretreatment (larger test portions apply).
  • Typical test portion: at least 5 mL (use known-capacity spoon); for untreated treated biowaste, larger volumes (e.g., 60 mL into 300 mL liquid) are specified.
• Suspension ratio and conditioning
  • Prepare a 1:5 volume suspension (sample:solution).
  • Shake/mix for 60 min ± 10 min, then allow to stand 1–3 h; avoid air ingress during equilibration.
• Measurement
  • Use a pH-meter with temperature control and slope adjustment, and a suitable glass (or combined) electrode.
  • For pH > 10 use an electrode designed for that range or include a pH 12 buffer during calibration.
• Reagents and calibration
  • Water with low conductivity, KCl (1 mol·L⁻¹), CaCl2 (0.01 mol·L⁻¹).
  • Use appropriate buffer solutions (examples: pH 4.00, 6.88, 9.22 at 20 °C) for calibration at 20 °C ± 2 °C; follow manufacturer instructions for meter/electrode care.
• Validation and reporting
  • The standard includes precision information (repeatability/reproducibility data in Annex A) and specifies required test-report elements.

Applications and users

• Environmental and soil testing laboratories performing routine soil pH determination.
• Waste management and composting facilities characterizing treated biowaste and sludge.
• Agricultural advisers, agronomists, researchers and regulatory bodies assessing soil chemistry, land application suitability and compliance.
• Useful for quality control, agronomic recommendations, environmental monitoring and compliance with national/regional regulations.

Related standards

• ISO 11464 (soil sample pretreatment)
• EN 16179, EN 15002 (biowaste/sludge pretreatment and sampling)
• EN 15933:2012 (superseded by EN ISO 10390:2022)

Keywords: EN ISO 10390:2022, ISO 10390:2021, soil pH determination, treated biowaste pH, sludge pH, 1:5 suspension, pH in KCl, pH in CaCl2, glass electrode, pH-meter calibration.

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2022
Nadomešča:
SIST EN 15933:2012
SIST ISO 10390:2006
Tla, obdelani biološki odpadki in blato - Določevanje pH-vrednosti (ISO
10390:2021)
Soil, treated biowaste and sludge - Determination of pH (ISO 10390:2021)
Boden, behandelter Bioabfall und Schlamm - Bestimmung des pH-Werts (ISO
10390:2021)
Sols, biodéchets traités et boues - Détermination du pH (ISO 10390:2021)
Ta slovenski standard je istoveten z: EN ISO 10390:2022
ICS:
13.080.10 Kemijske značilnosti tal Chemical characteristics of
soils
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 10390
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2022
EUROPÄISCHE NORM
ICS 13.080.10 Supersedes EN 15933:2012
English Version
Soil, treated biowaste and sludge - Determination of pH
(ISO 10390:2021)
Sols, biodéchets traités et boues - Détermination du pH Boden, behandelter Bioabfall und Schlamm -
(ISO 10390:2021) Bestimmung des pH-Werts (ISO 10390:2021)
This European Standard was approved by CEN on 12 March 2021.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, 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
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 10390:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 10390:2022) has been prepared by Technical Committee ISO/TC 190 "Soil
quality" in collaboration with Technical Committee CEN/TC 444 “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 September 2022, and conflicting national standards
shall be withdrawn at the latest by September 2022.
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 15933:2012.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
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, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 10390:2021 has been approved by CEN as EN ISO 10390:2022 without any modification.

INTERNATIONAL ISO
STANDARD 10390
Third edition
2021-04
Soil, treated biowaste and sludge –
Determination of pH
Sols, biodéchets traités et boues — Détermination du pH
Reference number
ISO 10390:2021(E)
©
ISO 2021
ISO 10390:2021(E)
© ISO 2021
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 2021 – All rights reserved

ISO 10390:2021(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagents . 1
6 Apparatus . 2
7 Laboratory sample . 3
8 Procedure. 3
8.1 Preparation of the suspension . 3
8.2 Calibration of the pH-meter . 3
8.3 Measurement of the pH . 4
9 Precision . 4
10 Test report . 4
Annex A (informative) Repeatability and reproducibility data . 5
Bibliography . 8
ISO 10390:2021(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 of 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 www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 190, Soil quality, Subcommittee SC 3,
Chemical and physical characterization.
This third edition cancels and replaces the second edition (ISO 10390:2005), which has been technically
revised.The main changes compared to the previous edition are as follows:
— The content of ISO 10390:2005 and EN 15933:2012 were merged;
— The scope was widened to include sludge and treated biowaste;
— Additional validation data for soil, sludge and treated biowaste were included;
— The text was editorially revised.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2021 – All rights reserved

INTERNATIONAL STANDARD ISO 10390:2021(E)
Soil, treated biowaste and sludge – Determination of pH
1 Scope
This document specifies an instrumental method for the routine determination of pH within the range
pH 2 to pH 12 using a glass electrode in a 1:5 (volume fraction) suspension of soil, sludge and treated
biowaste in either water (pH in H O), in 1 mol/l potassium chloride solution (pH in KCl) or in 0,01 mol/l
calcium chloride solution (pH in CaCl ).
This document is applicable to all types of air-dried soil and treated biowaste samples.
NOTE For example, pretreated in accordance with ISO 11464 or EN 16179 or EN 15002.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
4 Principle
A suspension of a test portion is made up in five times its volume with one of the following solutions:
— water;
— a solution of potassium chloride (KCl) in water, c = 1 mol/l;
— a solution of calcium chloride (CaCI ) in water, c = 0,01 mol/l.
The pH of the suspension is measured using a pH-meter.
NOTE 1 To make the procedure generally applicable to all types of soil, treated biowaste samples and sludges
except liquid sludge, a volume-to-volume shaking ratio is chosen because all test samples can be treated in the
same way. If a mass-to-volume ratio were chosen, the weighed amount of test sample would have to be adapted
for e.g. soils with a low density, to enable the preparation of the suspension. For the purpose of this document, it
is sufficiently accurate to measure the required volume of test portion with a measuring spoon.
NOTE 2 In samples with a high content of cha
...