Construction products - Assessment of release of dangerous substances - Guidance on the use of ecotoxicity tests applied to construction products

This Technical Report gives information on existing methods to test ecotoxicity of construction products. Information is given on how to combine recommended leaching tests with biological tests for the aquatic environment and how to avoid possible problems, when performing biological tests. Also suitable terrestrial tests on granular construction products diluted with artificial soil are proposed for a minimum test battery.
Reference has been made as far as possible to existing International and European Standards and guidelines.
The test procedure described in this Technical Report is technically suitable for all construction product eluates and for terrestrial tests on granular or paste-like construction products. However, from the point of view of test efficiency it is recommended mainly for products containing organics or polymers in case chemical analysis alone is not deemed to be sufficient. For inorganic products the chemical analysis is seen as straightforward in construction product eluates and therefore the added value of data received through ecotoxicity tests is seen as limited.

Bauprodukte - Bewertung der Freisetzung von gefährlichen Stoffen - Leitfaden für die Anwendung von ökotoxikologischen Untersuchungen auf Bauprodukte

Produits de construction – Evaluation de l'émission de substances dangereuses – Préconisations concernant l'utilisation des essais visant à évaluer l'écotoxicité des produits de construction

Le présent Rapport technique donne des informations sur les méthodes existantes permettant d’évaluer l’écotoxicité des produits de construction. Des informations sont fournies sur la façon d’associer les essais de lixiviation recommandés avec des essais biologiques portant sur l’environnement aquatique et sur la façon d’éviter d’éventuels problèmes lors de la réalisation de ces essais biologiques. Des essais terrestres appropriés aux produits de construction granulaires dilués avec du sol artificiel sont également proposés dans le cadre d’une batterie d’essais minimum.
Dans la mesure du possible, il a été fait référence aux normes et lignes directrices internationales et européennes existantes.
La procédure d’essai décrite dans ce Rapport technique est techniquement appropriée pour tous les éluats de produits de construction et pour les essais terrestres portant sur les produits de construction de type granulaire ou pâteux. Cependant, en considérant l’efficacité de l’essai, il est recommandé principalement pour les produits contenant des substances organiques ou des polymères lorsque l’analyse chimique seule est jugée insuffisante. Pour les produits inorganiques, l’analyse chimique des éluats de produits de construction est considérée comme simple, c’est pourquoi la valeur ajoutée des données issues des essais d’écotoxicité est considérée comme limitée.

Gradbeni proizvodi - Ocenjevanje sproščanja nevarnih snovi - Navodilo za uporabo ekotoksikoloških preskusov za gradbene proizvode

To tehnično poročilo podaja informacije o obstoječih metodah za preskušanje ekotoksičnosti gradbenih proizvodov. Podaja informacije o združevanju priporočenih preskusov izluževanja z biološkimi preskusi za vodno okolje ter preprečevanju možnih težav pri biološkem preskušanju. Podani so tudi primerni zemeljski preskusi zrnatih gradbenih proizvodov, razredčenih z umetno zemljo, za minimalne kombinirane preskuse.
Sklicevanje na obstoječe mednarodne in evropske standarde in smernice je bilo vključeno v kar največji možni meri.
Preskusni postopek, opisan v tem tehničnem poročilu, je tehnično primeren za vse izlužke gradbenih proizvodov in zemeljske preskuse gradbenih proizvodov v obliki zrn ali paste. Vendar se z vidika učinkovitosti preskušanja priporoča v glavnem za proizvode, ki vsebujejo organske snovi ali polimere, kadar se sama kemijska analiza ne šteje kot zadostna. Kemijska analiza neorganskih proizvodov se pri izlužkih gradbenih proizvodov šteje kot ustrezna, zato se dodana vrednost podatkov, pridobljenih na podlagi ekotoksikoloških preskusov, obravnava kot omejena.

General Information

Status
Published
Public Enquiry End Date
02-Apr-2017
Publication Date
07-Aug-2017
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
07-Jul-2017
Due Date
11-Sep-2017
Completion Date
08-Aug-2017

Buy Standard

Technical report
SIST-TP CEN/TR 17105:2017
English language
32 pages
sale 10% off
Preview
sale 10% off
Preview

e-Library read for
1 day

Standards Content (sample)

SLOVENSKI STANDARD
SIST-TP CEN/TR 17105:2017
01-september-2017
*UDGEHQLSURL]YRGL2FHQMHYDQMHVSURãþDQMDQHYDUQLKVQRYL1DYRGLOR]D
XSRUDERHNRWRNVLNRORãNLKSUHVNXVRY]DJUDGEHQHSURL]YRGH

Construction products - Assessment of release of dangerous substances - Guidance on

the use of ecotoxicity tests applied to construction products

Bauprodukte - Bewertung der Freisetzung von gefährlichen Stoffen - Leitfaden für die

Anwendung von ökotoxikologischen Untersuchungen auf Bauprodukte
3URGXLWVGHFRQVWUXFWLRQ(YDOXDWLRQGHO
pPLVVLRQGHVXEVWDQFHVGDQJHUHXVHV
3UpFRQLVDWLRQVFRQFHUQDQWO
XWLOLVDWLRQGHVHVVDLVYLVDQWjpYDOXHUO
pFRWR[LFLWpGHV
SURGXLWVGHFRQVWUXFWLRQ
Ta slovenski standard je istoveten z: CEN/TR 17105:2017
ICS:
13.020.99 Drugi standardi v zvezi z Other standards related to
varstvom okolja environmental protection
91.100.01 Gradbeni materiali na Construction materials in
splošno general
SIST-TP CEN/TR 17105:2017 en

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

---------------------- Page: 1 ----------------------
SIST-TP CEN/TR 17105:2017
---------------------- Page: 2 ----------------------
SIST-TP CEN/TR 17105:2017
CEN/TR 17105
TECHNICAL REPORT
RAPPORT TECHNIQUE
June 2017
TECHNISCHER BERICHT
ICS 91.100.01
English Version
Construction products - Assessment of release of
dangerous substances - Guidance on the use of ecotoxicity
tests applied to construction products

Produits de construction - Evaluation de l'émission de Bauprodukte - Bewertung der Freisetzung von

substances dangereuses ¿ Préconisations concernant gefährlichen Stoffen - Leitfaden für die Anwendung von

l'utilisation des essais visant à évaluer l'écotoxicité des ökotoxikologischen Untersuchungen auf Bauprodukte

produits de construction

This Technical Report was approved by CEN on 14 May 2017. It has been drawn up by the Technical Committee CEN/TC 351.

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: Avenue Marnix 17, B-1000 Brussels

© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TR 17105:2017 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST-TP CEN/TR 17105:2017
CEN/TR 17105:2017 (E)
Contents Page

European foreword ....................................................................................................................................................... 4

Introduction .................................................................................................................................................................... 5

1 Scope .................................................................................................................................................................... 6

2 Terms and definitions ................................................................................................................................... 6

3 General information on ecotoxicity assessment .................................................................................. 8

3.1 Basic approaches for ecotoxicity estimation ........................................................................................ 8

3.2 Principles for ecotoxicity testing ............................................................................................................... 8

3.3 Information on the biological test battery ............................................................................................. 9

4 Sampling and transport of construction products ........................................................................... 10

5 Leaching procedures for ecotoxicological testing ............................................................................ 10

5.1 Suitable leaching tests and selection of fractions from leaching tests ..................................... 10

5.1.1 General ............................................................................................................................................................. 10

5.1.2 Dynamic Surface Leaching Test (DSLT) CEN/TS 16637-2 ............................................................. 10

5.1.3 Horizontal up-flow percolation test (CEN/TS 16637-3) ................................................................ 11

5.1.4 Further leaching tests ................................................................................................................................. 11

5.2 Sampling, transport and storage of eluates ........................................................................................ 11

5.3 Pre-treatment of eluates............................................................................................................................ 12

6 Aquatic ecotoxicological testing ............................................................................................................. 12

6.1 Purpose of aquatic ecotoxicity testing .................................................................................................. 12

6.2 Selection of ecotoxicity tests and minimum test battery ............................................................... 13

6.3 Testing strategy and conditions ............................................................................................................. 13

6.3.1 General ............................................................................................................................................................. 13

6.3.2 Consideration of additional blank samples ........................................................................................ 14

6.3.3 pH adjustment ............................................................................................................................................... 14

6.3.4 Test concentrations ..................................................................................................................................... 14

6.3.5 Colour and turbidity .................................................................................................................................... 14

6.3.6 Unstable substances .................................................................................................................................... 15

6.4 Limitations of aquatic ecotoxicity tests ............................................................................................... 15

7 Assessment of biodegradability .............................................................................................................. 15

8 Terrestrial ecotoxicological testing ...................................................................................................... 15

8.1 Purpose of terrestrial ecotoxicity testing............................................................................................ 15

8.2 Pre-treatment of construction products for terrestrial tests ...................................................... 16

8.3 Selection of ecotoxicity tests and minimum test battery ............................................................... 17

8.4 Test report and quality assurance procedure ................................................................................... 17

Annex A (informative) CEN/TC 351 workshop on Ecotoxicity, biodegradability and
construction products on 10 April 2014 in Brussels – Conclusions and

recommendations ........................................................................................................................................ 19

Annex B (informative) Interface with information derived from REACH ............................................. 21

Annex C (informative) Information on regulations and guidelines with relevance for

ecotoxicological assessment of construction works with implications on

construction products ................................................................................................................................ 22

---------------------- Page: 4 ----------------------
SIST-TP CEN/TR 17105:2017
CEN/TR 17105:2017 (E)

Annex D (informative) Results from a European round robin test “Ecotoxicological

characterisation of eluates from construction products” .............................................................. 24

Annex E (informative) Evaluation of test results ........................................................................................... 27

E.1 Aquatic tests ................................................................................................................................................... 27

E.2 Terrestrial tests ............................................................................................................................................. 28

E.3 Example: LID approach in German regulation ................................................................................... 28

Bibliography ................................................................................................................................................................. 29

---------------------- Page: 5 ----------------------
SIST-TP CEN/TR 17105:2017
CEN/TR 17105:2017 (E)
European foreword

This document (CEN/TR 17105:2017) has been prepared by Technical Committee CEN/TC 351

“Construction Products - Assessment of release of dangerous substances”, 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 shall not be held responsible for identifying any or all such patent rights.

This document has been prepared under a mandate given to CEN by the European Commission and the

European Free Trade Association.

This Technical Report gives guidance for the combination of the recommended horizontal leaching tests

harmonized by CEN/TC 351 with existing biological test methods for the assessment of ecotoxicological

properties of eluates of construction products.

Guidance regarding biological tests for the effects of construction products on soil organisms is also

included. This document takes into account relevant information that had become available by

March 2016. This document is intended as easy-to-use guidance especially for the Group of Notified

Bodies, test laboratories and EOTA. Technical committees for construction products (product TCs) are

expected to benefit from the information given in the report, if they have been mandated to address

ecotoxicity in their product standards or if they are interested to include ecotoxicity in a dossier

prepared in the context of qualifications for a “without testing” status.
---------------------- Page: 6 ----------------------
SIST-TP CEN/TR 17105:2017
CEN/TR 17105:2017 (E)
Introduction

Ecotoxicological analysis of construction products and their eluates and biodegradability of the organic

substances in eluates belong to the essential characteristics covered by the basic requirement for

construction works “hygiene, health and the environment” from Annex 1 of the Construction Products

Regulation [1]. Under the European Commission’s mandate M/366 (see mandate database at

http://ec.europa.eu/growth/tools-databases/mandates) and according to the Indicative List (see

https://www.nen.nl/ under search term CEN/TC 351) which specifies the mandated parameters,

CEN/TC 351 has been assigned to deal with these essential characteristics. Now that the mandated

leaching tests from CEN/TC 351 (CEN/TS 16637-2, CEN/TS 16637-3) [2], [3] are available and also

work on the methods for the chemical analysis of eluates has progressed, CEN/TC 351 has included a

Technical Report on ecotoxicity / biodegradability in its active programme of work. The background for

the decision to cover this topic was presented in an open expert workshop in Brussels in April 2014.

The conclusions and recommendations of the workshop are presented in Annex A.

The regulatory background for the work is explained in Annex B and information on its possible

interface with data generated under the REACH Regulation is given in Annex C. In the context of

harmonized specifications for construction products currently only Germany requests performance

data on ecotoxicity/biodegradability in certain cases, i.e. when and where a chemical analysis and

assessment of the eluates of construction products is considered to be too onerous or not possible due

to the lack of analytical methods/data. Examples of products addressed are fire protective products and

fire stopping and fire sealing products depending on their ingredients. Ecotoxicity assessment is

considered to be especially relevant for the building and for the demolition phase in the life cycle of

construction works. These life cycle phases have been covered by the framework of the Construction

Products Regulation since 2013.

The majority of existing internationally harmonized ecotoxicity tests were developed firstly to assess

the ecotoxic potential of chemicals, waste water or contaminated soils. More recently, these tests have

been successfully applied to waste and waste eluates [4] to [7]. These methods can be applied with

some modifications for the ecotoxicological characterization of construction products and their eluates.

Several studies as well as an international round robin test have been conducted to validate some test

methods for construction product eluates and the results have been used as background information

[8] to [13]. The validation of the methods for construction products is not yet complete. Further

validation of the recommended test procedure is needed, if this TR is intended to be further developed

into a CEN/TS or EN (to be decided later).
---------------------- Page: 7 ----------------------
SIST-TP CEN/TR 17105:2017
CEN/TR 17105:2017 (E)
1 Scope

This Technical Report gives information on existing methods to test ecotoxicity of construction

products. Information is given on how to combine recommended leaching tests with biological tests for

the aquatic environment and how to avoid possible problems, when performing biological tests. Also

suitable terrestrial tests on granular construction products diluted with artificial soil are proposed for a

minimum test battery.

Reference has been made as far as possible to existing International and European Standards and

guidelines.

The test procedure described in this Technical Report is technically suitable for all construction product

eluates and for terrestrial tests on granular or paste-like construction products. However, from the

point of view of test efficiency it is recommended mainly for products containing organics or polymers

in case chemical analysis alone is not deemed to be sufficient. For inorganic products the chemical

analysis is seen as straightforward in construction product eluates and therefore the added value of

data received through ecotoxicity tests is seen as limited.
2 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
2.1
biodegradation

mineralization of organic compounds by bacteria and fungi to carbon dioxide, water and inorganic

compounds
2.2
control
mixture of control medium and organisms used in the test without test sample
2.3
control medium
combination of water and additives (e.g. nutrients, salts) used in the test
2.4
dilution level

reciprocal value of the volume fraction of test sample in dilution water in which the test is conducted

EXAMPLE 250 ml of test sample in a total volume of 1 000 ml (volume fraction of 25 %) represents dilution

level D = 4.

[SOURCE: EN ISO 15088:2008 [14], 3.2, modified - "waste water" replaced by "test sample"]

2.5
dilution soil
soil added to the test sample to prepare a series of defined dilutions

Note 1 to entry: The origin and composition of the soil is specified in the specific test.

---------------------- Page: 8 ----------------------
SIST-TP CEN/TR 17105:2017
CEN/TR 17105:2017 (E)
2.6
dilution water
water added to the test sample to prepare a series of defined dilutions
[SOURCE: EN ISO 20079:2006 [15], 3.7]
Note 1 to entry: The composition of the water is specified in the specific test.
2.7
effective concentration

concentration of the test material in water or sediment that causes x % change in response during a

specified time interval
[SOURCE: ISO/TS 20281:2006 [16], 3.8.1]
2.8
eluate
aqueous solution recovered from a leaching test
[SOURCE: CEN/TR 16110:2010 [4], 3.2]
2.9
leaching test

laboratory test during which a construction product is put into contact with a leachant under strictly

defined conditions for the determination of the release of substances into water
2.10
lowest ineffective dilution
dilution factor
LID

lowest ineffective dilution tested, expressed as dilution level D (2.4), at which no inhibition, or only

effects not exceeding the test-specific variability, are observed
[SOURCE: EN ISO 15088:2008 [14], 3.5]
2.11
storage time

period of time between filling of the sample container and further treatment of the sample in the

laboratory, if stored under predefined conditions
[SOURCE: EN ISO 5667-3:2012 [17], 3.4]
2.12
test material
material to be tested
[SOURCE: ISO 17126:2005 [18], 3.3]
---------------------- Page: 9 ----------------------
SIST-TP CEN/TR 17105:2017
CEN/TR 17105:2017 (E)
3 General information on ecotoxicity assessment
3.1 Basic approaches for ecotoxicity estimation

Ecotoxicity can be estimated using two approaches: a chemical-specific approach and a toxicity-based

approach. In the first situation, results of chemical analyses are compared to quality criteria or

threshold values to estimate toxicity. This approach is used, e.g. for the evaluation of biocides and is not

covered by this report. In the second case, toxicity is measured directly using biological toxicity tests.

These two approaches complement each other. However, determination of individual target substances

in complex mixtures of unknown or undisclosed composition does not allow a relevant estimation of

toxicity via the chemical-specific approach. For such samples, the toxicity based approach is recognised

to be practicable to estimate ecotoxicity.

Ecotoxicity tests integrate the effects of all dangerous or hazardous substances including additive,

synergistic and antagonistic effects. They are sensitive to the bioavailable fraction of the substances

only and integrate the effects of all dangerous substances, including those, not directly addressed by

chemical analyses. In principle there is no organism which can be used to test all possible effects on

ecosystems. Only a few ("model" or reference) species representing relevant ecological functions can be

tested in practice.
3.2 Principles for ecotoxicity testing

Biological tests are suitable for determining the effect of e.g. eluates or of solid material on test

organisms under specific experimental conditions. These effects can be enhancing or inhibiting, and can

be determined by the reaction of the organisms (e.g. death, growth, proliferation, morphological and

physiological changes). The apparent toxicity measurable in the biological test is the result of the

interaction between the constituents of the tested sample and the test organism. The protective

potential of the biological system, for instance by metabolic detoxification and excretion, is an integral

part of the biological test. Biological tests also include those tests which examine the effect of organisms

on substances (e.g. microbial degradation studies).

However, the sample to be tested can pose experimental challenges on biotesting. These challenges

should be paid attention to, when testing samples that contain sparingly soluble, volatile, unstable,

coloured substances and/or suspended, sometimes colloidal, particles. The complexity and

heterogeneity of materials should be taken into account when performing biotests. Special care should

be taken, if the test material is instable due to reactions and processes such as photo-degradation or

biodegradation. If spectrometric measurements are applied, turbidity and colour of the eluate should be

considered.

Ecotoxicity tests can be applied to construction product eluates (aquatic tests) or to test samples of

construction products mixed with artificial soil (terrestrial tests) to identify their potential hazardous

intrinsic properties with respect to the environment, if the construction product comes into contact

with soil or water in its intended use. In general aquatic test are performed with construction product

eluates mixed with dilution water but in a few cases liquid construction products could directly be

mixed with dilution water. The result of the biological test refers primarily to the organism used in the

test and the conditions stipulated in the test procedure. A harmful effect stated by means of

standardised tests can justify concern that aquatic or terrestrial organisms and ecosystems might be

endangered. The results, however, do not permit direct or extrapolative conclusions as to the

occurrence of similar effects in the aquatic or terrestrial environment.

The interpretation of the ecotoxicological testing is related to the purpose of testing and the intended

use scenario for the tested product and further criteria when defined in regulations or guidelines.

Depending upon the purpose of testing, technical choices can be made to enhance the reliability of the

results.
---------------------- Page: 10 ----------------------
SIST-TP CEN/TR 17105:2017
CEN/TR 17105:2017 (E)

Any construction product that falls under the scope of the leaching tests in the CEN/TS 16637 series

may also be assessed with biological tests, when and where desired. Currently biological tests are only

requested and applied in certain cases, if a chemical assessment of eluates from the CEN/TS 16637 tests

is not considered to cover all organic substances with hazardous properties that may be released from a

product [19], [20]. For construction products in direct contact with soil in their intended use also

terrestrial tests are a relevant assessment tool.
3.3 Information on the biological test battery

Sensitivity of animal and plant communities to toxicants may vary significantly from one species to

another. If testing is performed on one species or function only, the high diversity in the sensitivity

between species results in a high level of uncertainty. Only a combination of several ecotoxicity tests

can give a clear view of the toxic effects of product samples. The recommended approach for the

ecotoxicological characterisation of the toxicity of construction products and eluates is therefore to use

a battery of tests with several species belonging to different taxonomic groups and trophic levels.

Two approaches can be applied for selecting bioassays in order to establish a test battery: (i) an “a

priori” method, in which the selection is made, independently of the results, according to decision

criteria such as standardization of the method, ecological relevance of test organisms, or cost, (ii) an “a

posteriori” method, in which the selection is made after analysing test results obtained on a large series

of bioassays. Regarding the “a priori” approach, there is a good overall agreement on the criteria to be

considered to establish a test battery. These are: robustness, relevance, reproducibility, sensitivity,

endpoints (chronic, acute), standardisation status, discriminative power, cost, ease of use. The

importance of each individual criterion is clearly related to the aim of the ecotoxicological assessment.

These criteria fall into three main categories (see Table 1 below).

Table 1 — Relevant criteria for establishing a test battery for construction products

Decision Criteria
categories
General criteria — Good ratio cost efficiency of selected tests
— Lack of test results redundancy
— Ability of discrimination between samples
Test battery — Combination of different trophic levels
organization
— Combination of assessment endpoints (e.g. acute, chronic, genotox)
— Are the most important exposure pathways related to construction
products (soil, groundwater, surface water) covered?

Test methods — Ecological relevance: e.g. the species dominance in terms of abundance or

included in the biomass, representation of trophic level
test battery
— Ecological tolerance: degree of sensitivity of the species to changes in
environmental conditions
— Keeping/breeding: the easiness and quickness of the species to be bred in
the laboratory
— Practicability: Are a plenty of or few resources (costs, staff, and time)
required to perform the test?
— Reproducibility of the results obtained
— Sensitivity of the species
— Standardization: Is the method published as a validated (international)
guideline, preferably ISO?

In ecotoxicology the measured endpoints are intended to be indicative for potential negative effects on

the survival of the populations (not of the individuals). Relevant endpoints therefore are mortality and

reproduction impairment. Next to these direct endpoints also the presence of genotoxic substances

---------------------- Page: 11 ----------------------
SIST-TP CEN/TR 17105:2017
CEN/TR 17105:2017 (E)

(inducing DNA damage) and hormone disturbing compounds (inducing reproductive impairment) are

considered as relevant for interfering with normal population survival.

Due to general reasons of practicability, an ecotoxicological test battery usually consists of three tests

for each medium considered (aquatic, terrestrial), often each divided into three trophic/taxonomical

groups. The current approaches for the evaluation of test results are described in Annex E.

4 Sampling and transport of construction products

In addition to the relevant product standards guidance on sampling of construction products is given in

CEN/TR 16220 [21]. Also guidance given in EN 15002 [22] on how to produce representative test

portions from laboratory samples can be applied to construction products before biological tests are

carried out.

In the case of aquatic tests and in order to generate suitable eluates for ecotoxicological testing, it is

recommended additionally to use the guidance for taking laboratory samples of products and for

transport, storage and product sample pre-treatment for leaching tests given in CEN/TS 16637 [23], [2]

and [3], EN 14735 [24] or EN 16105 [25] and in relevant product standards or specifications.

5 Leaching procedures for ecotoxicological testing
5.1 Suitable leaching tests and selection of fractions from leaching tests
5.1.1 General

A leaching method should be selected using guidance given in CEN/TS 16637-1 [21]. Eluates from the

DSLT (CEN/TS 16637-2) and column test (CEN/TS 16637-3) are considered to be basically suitable for

ecotoxicological tests on the basis of current experience.

Products that come into contact with water only occasionally in their intended use may not be stable in

a test set up with long time immersion in water. For these products a leaching test with short

immersion phases ─ EN 16105 Laboratory method for determination of release of substances from

coatings in intermittent contact with water [25] ─ is recommended instead.

The results of biological tests with the same product, but using a different leaching test are not

comparable due to the different test conditions.

The selection of fractions from leaching tests for biological tests depends on the purpose of the testing

approach. Generally, for many construction products the maximum effect is expected to occur with the

first elution steps. It is often also practicable to test the first two fractions, because organic substances

are not always stable during long immersion periods.

An alternative option for the selection of fractions is to define an indicative parameter (e.g. TOC or

substances of interest) which is analysed in each eluate fraction. The two fractions with the highest

amount of the indicative parameter are combined and tested.

For construction products with continuously releasing compounds, those fractions with the longest

contact time may exhibit higher effects and the fractions should be taken from an advanced stage of the

leaching procedure. By comparison of effects from different fractions, the longer term behaviour of the

construction products may be assessed. The use of this option should be justified with an indicative

parameter.
5.1.2 Dynamic Surface Leaching Test (DSLT) CEN/TS 16637-2

The test describes a tank test for monolithic construction products of > 40 mm edge length in all

directions and for plates or sheets with a surface area exposed to the eluate of > 100 cm2. In the

standard procedure, this test is carried out for 64 days, while the eluate water is replaced at distinct

time intervals (after 6 h, 24 h, 2,25 d, 4 d, 9 d, 16 d, 36 d and 64 d).
---------------------- Page: 12 ----------------------
SIST-TP CEN/TR 17105:2017
CEN/TR 17105:2017 (E)

Because of the numerous eluates from DSLT and the effort required for ecotoxicity testing, it

...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.