SIST-TS CEN ISO/TS 21268-3:2010
(Main)Soil quality - Leaching procedures for subsequent chemical and ecotoxicological testing of soil and soil materials - Part 3: Up-flow percolation test (ISO/TS 21268-3:2007)
Soil quality - Leaching procedures for subsequent chemical and ecotoxicological testing of soil and soil materials - Part 3: Up-flow percolation test (ISO/TS 21268-3:2007)
This part of ISO/TS 21268 specifies a test, which is aimed at determining the leaching behaviour of inorganic and organic constituents from a soil and soil material. The method is a once-through percolation test with water (0,001 mol/l CaCl2) under standardized conditions of flow rate. The material is leached under dynamic hydraulic conditions. The eluates obtained can be used to determine the ecological properties of the soil with respect to micro-organisms, flora and fauna. The test results enable the distinction between different release patterns, for instance wash-out and release under the influence of interaction with the matrix, when approaching local equilibrium between material and leachant. This test method produces eluates, which can subsequently be characterised by physical, chemical and ecotoxicological methods in accordance with existing standard methods. The results of eluate analysis are presented as a function of the liquid/solid ratio. The test is not suitable for species that are volatile under ambient conditions. The application of this test method alone is not sufficient for the determination of the leaching behaviour of a material under specified conditions different to those from the test procedure, since this generally requires the application of several test methods, behavioural modelling and model validation. This part of ISO/TS 21268 does not address issues related to health and safety. It only determines the leaching properties as outlined in Clause 4.
Bodenbeschaffenheit - Eluierungsverfahren für die anschließende chemische und ökotoxikologische Untersuchung von Boden und von Bodenmaterialien - Teil 3: Perkolationstest im Aufwärtsstrom (ISO/TS 21268-3:2007)
Dieser Teil von ISO/TS 21268 legt eine Prüfung fest, deren Ziel die Bestimmung des Auslaugungsverhaltens
von anorganischen und organischen Bestandteilen aus Böden und Bodenmaterialien ist. Bei dem Verfahren
handelt es sich um eine Perkolationsprüfung mit einmaligem Durchlaufen von Wasser (0,001 mol/l CaCl2)
unter genormten Bedingungen der Fließgeschwindigkeit. Das Material wird unter hydraulisch dynamischen
Bedingungen ausgelaugt. Die erhaltenen Eluate können zur Bestimmung der ökologischen Eigenschaften des
Bodens in Bezug auf Mikroorganismen, Fauna und Flora verwendet werden. Die Prüfergebnisse ermöglichen
die Unterscheidung zwischen verschiedenen Freisetzungsmustern, wie z. B. Auswaschung und Freisetzung
unter Einfluss einer Wechselwirkung mit der Matrix, wenn eine Annäherung an das örtliche Gleichgewicht
zwischen Material und Auslaugungsmittel erfolgt.
Durch das vorliegende Prüfverfahren werden Eluate hergestellt, die anschließend mit physikalischen, chemischen
und ökotoxikologischen Verfahren nach bestehenden Standardverfahren charakterisiert werden können.
Die Ergebnisse der Eluatanalyse werden als Funktion des Flüssigkeits-/Feststoffverhältnisses dargestellt.
Die Prüfung ist nicht geeignet für Spezies, die unter Umgebungsbedingungen flüchtig sind.
ANMERKUNG 1 Zu den flüchtigen organischen Bestandteilen gehören niedermolekulare Komponenten in Mischungen,
wie z. B. Mineralöl.
ANMERKUNG 2 Es ist nicht immer möglich, die Prüfbedingungen gleichzeitig für anorganische und organische
Bestandteile zu optimieren und die optimalen Prüfbedingungen können sich auch für unterschiedliche Gruppen von
organischen Bestandteilen unterscheiden. Die Prüfanforderungen für organische Bestandteile sind im Allgemeinen strenger
als für anorganische Bestandteile. Die Prüfbedingungen, die für die Messung der Freisetzung von organischen
Bestandteilen geeignet sind, sind im Allgemeinen auch auf anorganische Bestandteile anwendbar.
Qualité du sol - Modes opératoires de lixiviation en vue d'essais chimiques et écotoxicologiques ultérieurs des sols et matériaux du sol - Partie 3: Essai de percolation à écoulement ascendant (ISO/TS 21268-3:2007)
L'ISO/TS 21268-3:2007 spécifie un essai destiné à déterminer le comportement à la lixiviation de constituants inorganiques et organiques issus de sols et de matériaux du sol. La méthode est un essai de percolation mené en une fois avec de l'eau (0,001 mol/l CaCl2) dans des conditions de débit normalisées. Le matériau est lixivié dans des conditions hydrauliques dynamiques. Les éluats obtenus peuvent être utilisés pour déterminer les propriétés écologiques du sol par rapport aux microorganismes, à la flore et à la faune. Les résultats de l'essai permettent de faire la distinction entre différents relargages type, tels que le lessivage ou le relargage sous l'effet de l'interaction avec la matrice, à l'approche de l'équilibre local entre le matériau et le lixiviant.
Cette méthode d'essai produit des éluats qui peuvent ensuite être caractérisés par des méthodes physiques, chimiques et écotoxicologiques selon des méthodes normalisées existantes. Les résultats de l'analyse des éluats sont présentés en fonction du rapport liquide/solide. Cet essai n'est pas adapté aux espèces qui sont volatiles dans des conditions ambiantes.
L'application de la présente méthode d'essai seule ne suffit pas pour déterminer le comportement à la lixiviation d'un matériau dans des conditions spécifiées différentes de celles applicables au mode opératoire, car cela nécessite généralement l'application de plusieurs méthodes d'essai, d'une modélisation comportementale et d'une validation du modèle. L'ISO/TS 21268-3:2007 ne traite pas des questions liées à la santé et à la sécurité. Elle permet uniquement de déterminer les propriétés de lixiviation.
Kakovost tal - Postopki izluževanja za nadaljnje kemijsko in ekotoksikološko preskušanje tal in talnih (zemeljskih) materialov - 3. del: Preskus v koloni s tokom navzgor (ISO/TS 21268-3:2007)
Ta del ISO/TS 21268 opredeljuje preskus, katerega cilj je določiti odziv neorganskih in organskih sestavin iz tal in talnih (zemeljskih) materialov na izluževanje. Ta metoda je enkratno izveden preskus v koloni z vodo (0,001 mol/l CaCl2) pod standardiziranimi pogoji pretoka. Material se izlužuje pod dinamičnimi hidravličnimi pogoji. Pridobljeni izlužki se lahko uporabijo za določevanje ekoloških lastnosti tal v zvezi z mikroorganizmi, floro in favno. Preskusni rezultati omogočajo razlikovanje med različnimi vzorci sproščanja, na primer izpiranje in sproščanje pod vplivom interakcije z matrico pri približevanju lokalnemu ravnovesju med materialom in lugom. Ta preskusna metoda prinaša izlužke, ki so lahko nadalje določeni s fizičnimi, kemičnimi in z ekotoksiološkimi metodami v skladu z obstoječimi standardnimi metodami. Rezultati analize izlužka so predstavljeni kot funkcija razmerja tekoče/trdno. Preskus ni primeren za vrste, ki so hlapne pod okoljskimi pogoji. Uporaba zgolj te preskusne metode ni zadostna za določevanje odziva materialov na izluževanje pod določenimi pogoji, ki se razlikujejo od pogojev iz preskusnega postopka, saj ta običajno zahteva uporabo več preskusnih metod, modeliranje odziva in validacijo modela. Ta del ISO/TS 21268 ne naslavlja vprašanj glede zdravja in varnosti. Kot je navedeno v Klavzuli 4, zgolj določa lastnosti izluženega.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST-TS CEN ISO/TS 21268-3:2010
01-februar-2010
Kakovost tal - Postopki izluževanja za nadaljnje kemijsko in ekotoksikološko
preskušanje tal in talnih (zemeljskih) materialov - 3. del: Preskus v koloni s tokom
navzgor (ISO/TS 21268-3:2007)
Soil quality - Leaching procedures for subsequent chemical and ecotoxicological testing
of soil and soil materials - Part 3: Up-flow percolation test (ISO/TS 21268-3:2007)
Bodenbeschaffenheit - Eluierungsverfahren für die anschließende chemische und
ökotoxikologische Untersuchung von Boden und von Bodenmaterialien - Teil 3:
Perkolationstest im Aufwärtsstrom (ISO/TS 21268-3:2007)
Qualité du sol - Modes opératoires de lixiviation en vue d'essais chimiques et
écotoxicologiques ultérieurs des sols et matériaux du sol - Partie 3: Essai de percolation
à écoulement ascendant (ISO/TS 21268-3:2007)
Ta slovenski standard je istoveten z: CEN ISO/TS 21268-3:2009
ICS:
13.080.05 Preiskava tal na splošno Examination of soils in
general
SIST-TS CEN ISO/TS 21268-3:2010 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST-TS CEN ISO/TS 21268-3:2010
TECHNICAL SPECIFICATION
CEN ISO/TS 21268-3
SPÉCIFICATION TECHNIQUE
TECHNISCHE SPEZIFIKATION
November 2009
ICS 13.080.05
English Version
Soil quality - Leaching procedures for subsequent chemical and
ecotoxicological testing of soil and soil materials - Part 3: Up-
flow percolation test (ISO/TS 21268-3:2007)
Qualité du sol - Modes opératoires de lixiviation en vue Bodenbeschaffenheit - Eluierungsverfahren für die
d'essais chimiques et écotoxicologiques ultérieurs des sols anschließende chemische und ökotoxikologische
et matériaux du sol - Partie 3: Essai de percolation à Untersuchung von Boden und von Bodenmaterialien - Teil
écoulement ascendant (ISO/TS 21268-3:2007) 3: Perkolationstest im Aufwärtsstrom (ISO/TS 21268-
3:2007)
This Technical Specification (CEN/TS) was approved by CEN on 8 September 2009 for provisional application.
The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to submit their
comments, particularly on the question whether the CEN/TS can be converted into a European Standard.
CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS available
promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in parallel to the CEN/TS)
until the final decision about the possible conversion of the CEN/TS into an EN is reached.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN ISO/TS 21268-3:2009: E
worldwide for CEN national Members.
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CEN ISO/TS 21268-3:2009 (E)
Contents Page
Foreword .3
2
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SIST-TS CEN ISO/TS 21268-3:2010
CEN ISO/TS 21268-3:2009 (E)
Foreword
The text of ISO/TS 21268-3:2007 has been prepared by Technical Committee ISO/TC 190 “Soil quality” of the
International Organization for Standardization (ISO) and has been taken over as CEN ISO/TS 21268-3:2009
by Technical Committee CEN/TC 345 “Characterization of soils” the secretariat of which is held by NEN.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to announce this Technical Specification: Austria, Belgium, Bulgaria, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO/TS 21268-3:2007 has been approved by CEN as a CEN ISO/TS 21268-3:2009 without any
modification.
3
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SIST-TS CEN ISO/TS 21268-3:2010
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SIST-TS CEN ISO/TS 21268-3:2010
TECHNICAL ISO/TS
SPECIFICATION 21268-3
First edition
2007-07-15
Soil quality — Leaching procedures for
subsequent chemical and
ecotoxicological testing of soil and soil
materials
Part 3:
Up-flow percolation test
Qualité du sol — Modes opératoires de lixiviation en vue d'essais
chimiques et écotoxicologiques ultérieurs des sols et matériaux du sol
Partie 3: Essai de percolation à écoulement ascendant
Reference number
ISO/TS 21268-3:2007(E)
©
ISO 2007
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SIST-TS CEN ISO/TS 21268-3:2010
ISO/TS 21268-3:2007(E)
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ii © ISO 2007 – All rights reserved
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ISO/TS 21268-3:2007(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope .1
2 Normative references .1
3 Terms and definitions .2
4 Principle.3
5 Reagents and materials .4
6 Apparatus .4
7 Sample pre-treatment.5
7.1 Sample preparation .5
7.2 Particle size reduction.6
7.3 Test portion .6
7.4 Determination of dry matter content.6
8 Procedure .6
8.1 Temperature .6
8.2 Preparation .7
8.3 Packing of the column .7
8.4 Start of the test.8
8.5 Collection of additional eluate fractions .9
8.6 Further preparation of the eluates for analysis .10
8.7 Blank test.10
9 Calculations.11
10 Test report .11
11 Test performance.11
Annex A (informative) Suggestions for packing the column, water saturation and establishment
of equilibrium conditions.12
Annex B (informative) Justification of the choices made in developing the test procedure .14
Bibliography .18
© ISO 2007 – All rights reserved iii
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SIST-TS CEN ISO/TS 21268-3:2010
ISO/TS 21268-3:2007(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
In other circumstances, particularly when there is an urgent market requirement for such documents, a
technical committee may decide to publish other types of normative document:
— an ISO Publicly Available Specification (ISO/PAS) represents an agreement between technical experts in
an ISO working group and is accepted for publication if it is approved by more than 50 % of the members
of the parent committee casting a vote;
— an ISO Technical Specification (ISO/TS) represents an agreement between the members of a technical
committee and is accepted for publication if it is approved by 2/3 of the members of the committee casting
a vote.
An ISO/PAS or ISO/TS is reviewed after three years in order to decide whether it will be confirmed for a
further three years, revised to become an International Standard, or withdrawn. If the ISO/PAS or ISO/TS is
confirmed, it is reviewed again after a further three years, at which time it must either be transformed into an
International Standard or be withdrawn.
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.
ISO/TS 21268-3 was prepared by Technical Committee ISO/TC 190, Soil quality, Subcommittee SC 7, Soil
and site assessment.
ISO/TS 21268 consists of the following parts, under the general title Soil quality — Leaching procedures for
subsequent chemical and ecotoxicological testing of soil and soil materials:
⎯ Part 1: Batch test using a liquid to solid ratio of 2 l/kg dry matter
⎯ Part 2: Batch test using a liquid to solid ratio of 10 l/kg dry matter
⎯ Part 3: Up-flow percolation test
⎯ Part 4: Influence of pH on leaching with initial acid/base addition
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Introduction
In various countries, tests have been developed to characterise and assess the constituents which can be
released from materials. The release of soluble constituents upon contact with water is regarded as a main
mechanism of release, which results in a potential risk to the environment during the use or disposal of
materials. The intent of these tests is to identify the leaching properties of materials. The complexity of the
leaching process makes simplifications necessary.
Not all of the relevant aspects of leaching behaviour can be addressed in one standard.
Tests to characterise the behaviour of materials can generally be divided into three categories (EN 12920;
[13]
EN/TS 14405) and are addressed in ISO 18772 . The relationships between these tests are summarised
below:
a) “Basic characterisation” tests are used to obtain information on the short- and long-term leaching
behaviour and characteristic properties of materials. Liquid/solid (L/S) ratios, leachant composition,
factors controlling leachability, such as pH, redox potential, complexing capacity, role of dissolved organic
carbon (DOC), ageing of material and physical parameters, are addressed in these tests.
b) “Compliance” tests are used to determine whether the material complies with a specific behaviour or with
specific reference values. The tests focus on key variables and leaching behaviour previously identified
by basic characterisation tests.
c) “On-site verification” tests are used as a rapid check to confirm that the material is the same as that which
has been subjected to the compliance test(s). On-site verification tests are not necessarily leaching tests.
The test procedure described in this method belongs to category b): basic characterisation tests.
NOTE Up to now, the test procedure described in this part of ISO/TS 21268 has not been validated internationally.
This Technical Specification was elaborated on the basis of CEN/TS 14405.
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SIST-TS CEN ISO/TS 21268-3:2010
TECHNICAL SPECIFICATION ISO/TS 21268-3:2007(E)
Soil quality — Leaching procedures for subsequent chemical
and ecotoxicological testing of soil and soil materials
Part 3:
Up-flow percolation test
1 Scope
This part of ISO/TS 21268 specifies a test, which is aimed at determining the leaching behaviour of inorganic
and organic constituents from a soil and soil material. The method is a once-through percolation test with
water (0,001 mol/l CaCl ) under standardized conditions of flow rate. The material is leached under dynamic
2
hydraulic conditions. The eluates obtained can be used to determine the ecological properties of the soil with
respect to micro-organisms, flora and fauna. The test results enable the distinction between different release
patterns, for instance wash-out and release under the influence of interaction with the matrix, when
approaching local equilibrium between material and leachant.
This test method produces eluates, which can subsequently be characterised by physical, chemical and
ecotoxicological methods in accordance with existing standard methods. The results of eluate analysis are
presented as a function of the liquid/solid ratio. The test is not suitable for species that are volatile under
ambient conditions.
NOTE 1 Volatile organic constituents include the low-molecular-weight components in mixtures such as mineral oil.
NOTE 2 It is not always possible to optimise test conditions simultaneously for inorganic and organic constituents and
optimum test conditions may also vary between different groups of organic constituents. Test requirements for organic
constituents are generally more stringent than those for inorganic constituents. The test conditions suitable for measuring
the release of organic constituents will generally also be applicable to inorganic constituents.
NOTE 3 For ecotoxicological testing, eluates representing the release of both inorganic and organic contaminants are
needed. In this document, ecotoxicological testing is also meant to include genotoxicological testing.
The application of this test method alone is not sufficient for the determination of the leaching behaviour of a
material under specified conditions different to those from the test procedure, since this generally requires the
application of several test methods, behavioural modelling and model validation. This part of ISO/TS 21268
does not address issues related to health and safety. It only determines the leaching properties as outlined in
Clause 4.
2 Normative references
The following referenced documents are indispensable for the application 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 3696, Water for analytical laboratory use — Specification and test methods
ISO 5667-3, Water Quality — Sampling — Part 3: Guidance on the preservation and handling of water
samples
ISO 7027:1999, Water quality — Determination of turbidity
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ISO/TS 21268-3:2007(E)
ISO 10381-1, Soil quality — Sampling — Part 1: Guidance on the design of sampling programmes
ISO 10381-2, Soil quality — Sampling — Part 2: Guidance on sampling techniques
ISO 10381-3, Soil quality — Sampling — Part 3: Guidance on safety
ISO 10381-4, Soil quality — Sampling — Part 4: Guidance on the procedure for investigation of natural, near-
natural and cultivated sites
ISO 10381-5, Soil quality — Sampling — Part 5: Guidance on the procedure for the investigation of urban and
industrial sites with regard to soil contamination
ISO 10381-6, Soil quality — Sampling — Part 6: Guidance on the collection, handling and storage of soil for
the assessment of aerobic microbial processes in the laboratory
ISO 10523, Water quality — Determination of pH
ISO 11465, Soil quality — Determination of dry matter and water content on a mass basis — Gravimetric
method
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
leaching test
test during which a material is put into contact with a leachant under strictly defined conditions and some
constituents of the material are extracted
3.2
leachant
liquid used in a leaching test
NOTE For the purposes of this part of ISO/TS 21268, the leachant is water as specified in 5.1.
3.3
eluate
solution recovered from a leaching test
3.4
liquid to solid ratio
L/S
the ratio between the total volume of liquid (L in litres), which in this extraction is in contact with the soil
sample, and the dry mass of the sample (S in kg of dry matter).
NOTE L/S is expressed in l/kg.
3.5
laboratory sample
sample or subsample(s) sent to or received by the laboratory
3.6
test sample
sample, prepared from the laboratory sample, from which test portions are removed for testing or analysis
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ISO/TS 21268-3:2007(E)
3.7
test portion
quantity of material of appropriate size for measurement of the concentration or other properties of interest,
taken from the test sample
NOTE 1 The test portion can be taken from the laboratory sample directly if no pre-treatment of sample is required, but
usually it is taken from the test sample.
NOTE 2 A unit or increment of proper homogeneity, size and fineness, needing no further preparation, can be a test
portion.
3.8
granular material
solid material, not being monolithic
NOTE It is not a gas, a liquid or a sludge.
3.9
dry matter content
w
dm
ratio expressed in percent between the mass of the dry residue and the corresponding raw mass
NOTE It is determined in accordance with ISO 11465.
3.10
soil materials
excavated soil, dredged materials, manufactured soils, treated soils and fill materials
[ISO 15176:2002, definition 3.1.4]
4 Principle
This part of ISO/TS 21268 describes a method to determine the release of constituents from soil and soil
material, packed in a column into a leachant percolating through it. A continuous vertical up-flow is used,
which allows a column test under water-saturated conditions. The test conditions, including the flow rate of the
leachant, are chosen such that it can be concluded from the results, which components are rapidly being
washed out and which components are released under the influence of interaction with the matrix.
The test portion of the material with a specified particle size is packed in a column in a standardised manner.
Pre-equilibration is applied to reach local equilibrium at the start. The column size is related to the amount of
eluate needed for subsequent analysis and testing. The leachant is demineralised water with 0,001 M CaCl .
2
The leachant is percolated in up-flow through the column at a specified flow rate up to a fixed L/S ratio. The
eluate is collected in several separate fractions.
After the test, the leaching conditions, in terms of pH, electrical conductivity or DOC and, optionally, turbidity
or redox potential dictated by the material, shall be recorded.
NOTE These parameters often control the leaching behaviour of soil materials and are therefore important for
evaluation of the test results. Dissolved organic carbon (DOC), in particular, is crucial in soil and soil materials for many
inorganic and organic constituents.
The properties of the eluate are measured using methods developed for water analysis adapted to meet
criteria for analysis of eluates and/or the eluate may be subjected to subsequent ecotoxicological testing.
The results of the test are expressed as a function of liquid/solid ratio, in terms of both concentration (mg of
the constituents released per litre eluate) and release [mg of the constituents released cumulatively per kg of
material (dry mass)] of the constituents.
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ISO/TS 21268-3:2007(E)
The procedure described in this part of ISO/TS 21268 is based on the more stringent test requirements for
determining the release of organic constituents and/or for subsequent ecotoxicological testing. If only the
release of inorganic constituents is to be measured, less stringent requirements may be adapted for some
steps of the procedure.
5 Reagents and materials
5.1 Demineralised water or deionised water or water of equivalent purity (5 < pH < 7,5) with a
conductivity < 0,5 mS/m in accordance with grade 3 specified in ISO 3696, made to 0,001 M CaCl .
2
5.2 Rinsing solutions: nitric acid (pro analyse) 0,1 mol/l and an organic solvent (acetone, pro analyse).
6 Apparatus
The materials and equipment specified in 6.2 to 6.13 shall be checked before use for proper operation and
absence of interfering substances, which can affect the result of the test.
The equipment specified under 6.5, 6.6, 6.13 and 6.14 shall also be calibrated.
6.1 Column made of glass or plastics with an internal diameter of 5 cm or 10 cm and a filling height of
about (30 ± 5) cm, fitted with filters (6.3) in the bottom and top sections made of appropriate materials
ensuring minimum interference with the contaminants of interest [e.g. polychlorotrifluoroethylene (PCTFE)]. In
the top and bottom of the column, a filter plate or a thin layer of fine-grained non-reactive material (e.g. fine
quartz sand) is applied to ensure proper water flow over the width of the column and as a support for the pre-
filter.
NOTE 1 A drawing of the column and accompanying equipment is given in Figure A.1.
NOTE 2 Glass of high quality is usually considered adequate for both metal and organic contaminants, particularly
since the pH range usually covered in soil testing does not reach the conditions (pH > 10 and pH < 3) where glass itself is
attacked. For ecotoxicity testing, eluates with both metal and organic contaminants are needed, which emphasises the
need to generate integrated eluates.
NOTE 3 When only organic constituents are analysed, stainless steel column and fittings can be applied.
6.2 Filters for in-line or off-line filtration of the eluates; they shall not adsorb the compounds of interest. This
shall be tested in preliminary experiments.
NOTE For organic compounds, glass-fibre filters without organic glue are suitable. If only inorganic contaminants are
analysed, alternative filter materials can be selected (e.g. cellulose acetate, PTFE).
6.3 Pre-filters for the column with a pore size of 1,5 µm to 20 µm. The filters shall be glass-fibre filters
without organic glue.
NOTE If only inorganic contaminants are analysed, alternative filter materials can be selected (e.g. cellulose acetate,
PTFE).
6.4 Peristaltic pump with an adjustable capacity of between 0 ml/h and 60 ml/h.
NOTE Additional pumps can be used.
6.5 Analytical balance with an accuracy of at least 0,1 g.
6.6 pH meter with an accuracy of at least ± 0,05 pH units.
6.7 Electrical conductivity meter with an accuracy of at least 0,1 mS/m.
4 © ISO 2007 – All rights reserved
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SIST-TS CEN ISO/TS 21268-3:2010
ISO/TS 21268-3:2007(E)
6.8 Tubing material (made of ethylene-tetrafluoroethylene, ETFE) adapted to the analysis to be performed
(see ISO 5667-3).
NOTE When only organic constituents are analysed, stainless steel tubing can be used. When only inorganic
constituents are analysed, polytetrafluoroethylene (PTFE) or similar tubing materials can be used.
6.9 High-quality glass bottles with an appropriate volume, and with a screw cap with a PTFE inlay, for
eluate collection and preservation of eluate samples (in accordance with ISO 5667-3).
NOTE If only inorganic contaminants are analysed, alternative bottle materials can be selected (e.g. HDPE, PTFE).
6.10 Crushing equipment: a jaw crusher or a cutting device.
6.11 Sieving equipment with sieves of 4 mm nominal screen size.
6.12 Sample splitter for sub-sampling of laboratory samples (optional).
6.13 Redox potential meter (optional).
6.14 Turbidity meter as specified in ISO 7027.
6.15 Centrifuge operating at 20 000g to 30 000g using centrifuge tubes of fluorinated ethylene propylene
(FEP) or tubes of an alternative material, which is inert with regard to both inorganic and organic compounds
and suitable for high-speed centrifugation.
Alternatively, if a high-speed centrifuge is not available, a centrifuge operating at 2 000g to 2 500g using glass
bottles may be used in combination with increased centrifugation time. Cooling shall be applied to maintain
the desired temperature.
7 Sample pre-treatment
7.1 Sample preparation
Obtain a laboratory sample of at least 10 kg,
...
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