FprEN ISO 10390

Soil, sludge and treated biowaste - Determination of pH (ISO/FDIS 10390:2020)

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 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 International Standard is applicable to all types of soil, sludge and biowaste, for example
pretreated in accordance with ISO 11464 or EN 16179.

Boden, Schlamm und behandelter Bioabfall - Bestimmung des pH-Wertes (ISO/FDIS 10390:2020)

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 ist auf alle Arten luftgetrockneter Bodenproben und behandelten Bioabfallproben anzuwenden.
ANMERKUNG Zum Beispiel vorbehandelt nach ISO 11464 oder EN 16179 oder EN 15002.

Sol, boues et biodéchets traités - Détermination du pH (ISO/FDIS 10390:2020)

Tla, blato in obdelani biološki odpadki - Določevanje pH (ISO/FDIS 10390:2020)

General Information

• Status: Not Published
• 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: 6055 - CEN Ratification completed (DOR) - Publishing
• Due Date: 12-Mar-2021
• Completion Date: 12-Mar-2021
• Ref Project: kSIST FprEN ISO 10390:2021 - Soil, sludge and treated biowaste - Determination of pH (ISO/FDIS 10390:2020)

RELATIONS

• Revised: EN 15933:2012 - Sludge, treated biowaste and soil - Determination of pH
• Effective Date: 07-Jul-2021

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN ISO 10390:2020
01-februar-2020
Tla, blato in obdelani biološki odpadki - Določevanje pH (ISO/DIS 10390:2020)
Soil, sludge and treated biowaste - Determination of pH (ISO/DIS 10390:2020)
Boden, Schlamm und behandelter Bioabfall - Bestimmung des pH-Wertes (ISO/DIS
10390:2020)
Terre, boues et biodéchets traités - Détermination du pH (ISO/DIS 10390:2020)
Ta slovenski standard je istoveten z: prEN ISO 10390
ICS:
13.080.10 Kemijske značilnosti tal Chemical characteristics of
soils
oSIST prEN ISO 10390:2020 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 10390:2020
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oSIST prEN ISO 10390:2020
DRAFT INTERNATIONAL STANDARD
ISO/DIS 10390
ISO/TC 190/SC 3 Secretariat: DIN
Voting begins on: Voting terminates on:
2020-01-08 2020-04-01
Soil, sludge and treated biowaste – Determination of pH
Terre, boues et biodéchets traités — Détermination du pH
ICS: 13.080.10
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
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 10390:2020(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 2020
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oSIST prEN ISO 10390:2020
ISO/DIS 10390:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

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

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ii © ISO 2020 – All rights reserved
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oSIST prEN ISO 10390:2020
ISO/DIS 10390:2020(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Principle ........................................................................................................................................................................................................................ 1

4 Reagents ........................................................................................................................................................................................................................ 1

5 Apparatus ..................................................................................................................................................................................................................... 2

6 Laboratory sample ............................................................................................................................................................................................. 3

7 Procedure..................................................................................................................................................................................................................... 3

7.1 Preparation of the suspension ................................................................................................................................................... 3

7.2 Calibration of the pH-meter ......................................................................................................................................................... 3

7.3 Measurement of the pH ................................................................................................................................................................... 3

8 Repeatability ............................................................................................................................................................................................................ 4

9 Test report ................................................................................................................................................................................................................... 4

Annex A (informative) Repeatability and reproducibility data ................................................................................................ 5

Bibliography ................................................................................................................................................................................................................................ 8

© ISO 2020 – All rights reserved iii
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oSIST prEN ISO 10390:2020
ISO/DIS 10390:2020(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 15933:2012-11 were merged;
— The text was editorially revised.
iv © ISO 2020 – All rights reserved
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oSIST prEN ISO 10390:2020
DRAFT INTERNATIONAL STANDARD ISO/DIS 10390:2020(E)
Soil, sludge and treated biowaste – 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 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

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 1770:1981, Solid-stem general purpose thermometers
3 Principle

A suspension of a testportion 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 except liquid

sludge, a volume-to-volume shaking ratio is chosen because then all soil 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 International

Standard, taking the required volume of test portion with a measuring spoon is sufficiently accurate.

NOTE 2 In samples with a high content of charged particles (e.g. organic matter, clay) the suspension effect

can modify the potential difference between the electrodes, and thereby have an influence on the recorded pH

value. This problem is minimized by gentle stirring of the suspension. For calcareous material, carbon dioxide

may be absorbed by the suspension, which makes it difficult to reach an equilibrium value. Other sources of error

are associated with materials containing sulfidic minerals or volatile acids.
4 Reagents
Use only reagents of recognized analytical grade.
4.1 Water, with a specific conductivity not higher than 0,2 mS/m at 25 °C .
4.2 Potassium chloride solution, c(KCl) = 1 mol/l
Dissolve 74,5 g of potassium chloride in water (4.1) and dilute to 1 000 ml.
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oSIST prEN ISO 10390:2020
ISO/DIS 10390:2020(E)
4.3 Calcium chloride solution, c(CaCl ) = 0,01 mol/l

Dissolve 1,47 g of calcium chloride dihydrate (CaCl ∙2H O) in water (4.1) and dilute to 1 000 ml.

2 2
4.4 Buffer solutions, for calibration of the pH-meter

Use at least two of the following buffer solutions for calibration. Buffer solutions having a similar or

equivalent pH that are commercially available may also be used.

NOTE 1 The buffer solutions 4.4.1, 4.4.2 and 4.4.3 are stable for one month when stored in polyethylene

bottles.

NOTE 2 If automated or semi-automated systems are used, buffers recommended by the manufacturer or

commercially available buffers can be used.
4.4.1 Buffer solution, pH 4,00 at 20 °C

Dissolve 10,21 g of potassium hydrogen phthalate (C H O K) in water (4.1) and dilute to 1 000 ml.

8 5 4

The potassium hydrogen phthalate shall be dried before use for 2 h at 115 °C ± 5 °C.

4.4.2 Buffer solution, pH 6,88 at 20 °C

Dissolve 3,39 g of potassium dihydrogen phosphate (KH PO ) and 3,53 g of disodium hydrogen

2 4
phosphate (Na HPO ) in water (4.1) and dilute to 1 000 ml.
2 4

The potassium dihydrogen phosphate shall be dried before use for 2 h at 115 °C ± 5 °C.

4.4.3 Buffer solution, pH 9,22 at 20 °C

Dissolve 3,80 g of disodium tetraborate decahydrate (Na B O ·10H O) in water (4.1) and dilu

...