oSIST prEN ISO 11265:2024
(Main)Environmental solid matrices - Determination of the specific electrical conductivity (ISO/DIS 11265:2024)
Environmental solid matrices - Determination of the specific electrical conductivity (ISO/DIS 11265:2024)
Specifies an instrumental method for the routine determination of the specific electrical conductivity in an aqueous extract of soil. The determination is carried out to obtain an indication of the content of water-soluble electrolytes in a soil.
Feste Umweltmatrizes - Bestimmung der spezifischen elektrischen Leitfähigkeit (ISO/DIS 11265:2024)
Matrices solides environnementales - Détermination de la conductivité électrique spécifique (ISO/DIS 11265:2024)
La présente Norme internationale prescrit une méthode instrumentale pour la détermination en routine de la conductivité électrique spécifique d'un extrait aqueux de sol. La détermination est effectuée afin d'obtenir une indication sur la teneur en électrolytes hydrosolubles dans un échantillon de sol. La présente Norme internationale est applicable à tout échantillon de sol séché à l'air.
Trdni matriksi v okolju - Določanje specifične električne prevodnosti (ISO/DIS 11265:2024)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-november-2024
Trdni matriksi v okolju - Določanje specifične električne prevodnosti (ISO/DIS
11265:2024)
Environmental solid matrices - Determination of the specific electrical conductivity
(ISO/DIS 11265:2024)
Feste Umweltmatrizes - Bestimmung der spezifischen elektrischen Leitfähigkeit (ISO/DIS
11265:2024)
Matrices solides environnementales - Détermination de la conductivité électrique
spécifique (ISO/DIS 11265:2024)
Ta slovenski standard je istoveten z: prEN ISO 11265
ICS:
13.080.20 Fizikalne lastnosti tal Physical properties of soils
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT
International
Standard
ISO/DIS 11265
ISO/TC 190/SC 3
Environmental solid matrices —
Secretariat: DIN
Determination of the specific
Voting begins on:
electrical conductivity
2024-09-30
Détermination de la conductivité électrique spécifique
Voting terminates on:
2024-12-23
ICS: 13.080.20
THIS DOCUMENT IS A DRAFT CIRCULATED
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Reference number
ISO/DIS 11265:2024(en)
DRAFT
ISO/DIS 11265:2024(en)
International
Standard
ISO/DIS 11265
ISO/TC 190/SC 3
Environmental solid matrices —
Secretariat: DIN
Determination of the specific
Voting begins on:
electrical conductivity
Détermination de la conductivité électrique spécifique
Voting terminates on:
ICS: 13.080.20
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2024
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
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Published in Switzerland Reference number
ISO/DIS 11265:2024(en)
ii
ISO/DIS 11265:2024(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagents . 1
6 Apparatus and glassware . 2
7 Laboratory sample . 2
8 Procedure . 3
8.1 Extraction .3
8.2 Checking of the cell constant .3
8.3 Measurement of the electrical conductivity of the filtrates .4
9 Interferences . 4
10 Repeatability . 4
11 Test report . 5
12 Bibliography . 5
Annex A (informative) Results of an interlaboratory trial for the determination of the specific
electrical conductivity of soils . 6
iii
ISO/DIS 11265:2024(en)
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 second edition cancels and replaces the first edition (ISO 11265:1994), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— change of temperature criteria during extraction.
— merger with CEN/TS 15937
— the distinction between solid and sludge like matrices is added.
Annex A of this International Standard is for information only.
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
DRAFT International Standard ISO/DIS 11265:2024(en)
Environmental solid matrices — Determination of the specific
electrical conductivity
1 Scope
This International Standard specifies an instrumental method for the routine determination of the specific
electrical conductivity in an aqueous extract of soil, sludge, biowaste and waste. The determination is
carried out to obtain an indication of the content of water-soluble electrolytes in a sample.
This International Standard is applicable to all types of air-dried samples of soil, sludge, biowaste and waste.
2 Normative references
The following documents are referred to in the text in such a way that some or all 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 7888:1985, Water quality — Determination of electrical conductivity
ISO 11464:2006, Soil quality — Pretreatment of samples for physico-chemical analysis
EN 15002, Characterization of waste — Preparation of test portions from the laboratory sample
EN 16179, Sludge, treated biowaste and soil — Guidance for sample pretreatment
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
4 Principle
Air-dried solids are extracted with water at 22 °C ± 3 °C at an extraction ratio of 1:5 (m/V), to dissolve the
electrolytes. The specific electrical conductivity of the extract or fresh liquid sludge is measured and the
result is corrected to a temperature of 25 °C.
NOTE For definitions of the concepts used, see ISO 7888.
5 Reagents
Use only reagents of recognized analytical grade.
5.1 Water, demineralized, with a specific electrical conductivity not higher than 0,2 mS/m at 25 °C.
ISO/DIS 11265:2024(en)
5.2 Potassium chloride solution, c(KCl) = 0,1 mol/l.
Dissolve 7,456 g of potassium chloride, previously dried for 2 h at 105 °C ± 5 °C in water (5.1), and dilute to
1 000 ml at 20 °C. The specific electrical conductivity of this solution is 1 288 mS/m at 25 °C.
5.3 Potassium chloride solution, c(KCl) = 0,020 0 mol/l.
Pour 200,0 ml of the potassium chloride solution (5.2) into a 1 000 ml volumetric flask and dilute to volume
with water at 20 °C. The specific electrical conductivity of this solution is 277 mS/m at 25 °C.
5.4 Potassium chloride solution, c(KCl) = 0,010 0 mol/l.
Pour 100,0 ml of the potassium chloride solution (5.2) into a 1 000 ml volumetric flask and dilute to volume
with water at 20 °C. The specific electrical conductivity of this solution is 141 mS/m at 25 °C.
All the potassium chloride solutions (5.2, 5.3 and above) used for calibration shall be stored in tightly sealed
bottles which do not release sufficient alkali or alkali-earth cations to affect the electrical conductivity of
the solutions.
NOTE 1 Plastics bottles may be suitable.
NOTE 2 For bottles containing potassium chloride solutions, plastics seals are recommended as glass will weld to
the bottle.
NOTE 3 The use of commercially available conductivity standards is permitted.
6 Apparatus and glassware
6.1 Conductivity meter, fitted with a conductivity cell, equipped with an adjustable measuring range
setting and (automatic) temperature correction and having an accuracy of 1 mS/m at 20 °C. Preferably, the
conductivity meter should also be equipped with a cell-constant control.
6.2 Analytical balance, with an accuracy of at least 0,01 g.
6.3 Thermometer, capable of measuring to the nearest 0,1 °C.
6.4 Shaking machine, with a horizontal movement sufficiently vigorous to produce and maintain a 1:5
soil: water suspension, placed in a environment where the temperature adjusted is maintained at (22 ± 3) °C.
NOTE Machines with a speed of about 180 cycles per minute and a stroke of about 5 cm have been found
...
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