prEN 16663

SLOVENSKI STANDARD
01-september-2024
Trajnost lesa in lesnih izdelkov - Določanje emisij iz zaščitenega lesa v okolje -
leseni izdelki, izpostavljeni 3. razredu uporabe (nepokrita uporaba, ni v stiku z
zemljo) - Delno terenska metoda
Durability of wood and wood-based products - Determination of emissions from
preservative treated wood to the environment - Wooden commodities exposed in Use
Class 3 (Not covered, not in contact with the ground) - Semi-field method
Dauerhaftigkeit von Holz und Holzprodukten - Bestimmung von Emissionen von mit
Holzschutzmitteln behandeltem Holz an die Umwelt - Holzprodukte in Gebrauchsklasse
3 (nicht abgedeckt, ohne Erdkontakt) - Semi-Feldverfahren
Durabilité du bois et des matériaux dérivés du bois - Détermination des émissions dans
l'environnement du bois traité avec des produits de préservation - Produits de base en
bois exposés à la classe d'emploi 3 (dans un endroit non abrité, n'étant pas en contact
avec le sol) - Méthode semi-terrain
Ta slovenski standard je istoveten z: prEN 16663
ICS:
13.020.30 Ocenjevanje vpliva na okolje Environmental impact
assessment
71.100.50 Kemikalije za zaščito lesa Wood-protecting chemicals
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2024
ICS 71.100.50; 13.020.30 Will supersede CEN/TS 16663:2016
English Version
Durability of wood and wood-based products -
Determination of emissions from preservative treated
wood to the environment - Wooden commodities exposed
in Use Class 3 (Not covered, not in contact with the
ground) - Semi-field method
Durabilité du bois et des matériaux dérivés du bois - Dauerhaftigkeit von Holz und Holzprodukten -
Détermination des émissions dans l'environnement du Abschätzung von Emissionen von mit
bois traité avec des produits de préservation - Produits Holzschutzmitteln behandeltem Holz an die Umwelt -
de base en bois exposés à la classe d'emploi n° 3 (dans Holzprodukte in Gebrauchsklasse 3 (nicht abgedeckt,
un endroit abrité, n'étant pas en co ohne Erdkontakt) - Semi-Feldverfahren
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 38.
If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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, Türkiye and
United Kingdom.
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.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 16663:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Description of the test method . 5
4.1 Principle . 5
4.2 Quality criteria . 5
4.3 Wood preservative . 5
4.4 Apparatus . 6
4.5 Test specimens . 7
4.5.1 General . 7
4.5.2 Species of wood . 7
4.5.3 Quality of wood and wood moisture content . 7
4.5.4 Preparation of test specimens . 8
4.5.5 Number of test specimens . 8
4.5.6 End seal . 8
4.6 Procedure. 8
4.6.1 Product under test . 8
4.6.2 Treatment and handling of test specimens . 8
4.6.3 Untreated controls (optional) . 9
4.6.4 Exposure test site . 9
4.6.5 Duration of the test . 9
4.6.6 Collection of the leachates . 9
4.6.7 Chemical analysis . 10
4.7 Expression of results . 10
5 Test report . 10
Annex A (informative) Test set-up and weather rack . 12
A.1 Vertical exposure . 12
A.2 Horizontal exposure. 14
Annex B (informative) Model treatments . 15
B.1 For preservative intended for superficial treatment . 15
B.2 For preservative intended for penetration treatment . 15
Annex C (informative) Orientation of annual growth rings and accepted heartwood . 16
Annex D (informative) Stability study . 17
Bibliography . 18
European foreword
This document (prEN 16663:2024) has been prepared by Technical Committee CEN/TC 38 “Durability
of wood and wood-based products”, the secretariat of which is held by SIS.
This document supersedes CEN/TS 16663:2016.
Introduction
The leaching from preservative treated wood into the environment needs to be quantified to enable an
environmental risk assessment to be made of the treated wood, e.g. according to the Biocidal Products
Regulation, 528/2012. This document describes a semi-field method for the determination of leachate
from wood treated with preservatives where the treated wood is not covered and not in contact with the
ground or water (Use Class 3 according to EN 335).
The method is a semi-field procedure for obtaining water samples (leachate) from treated wood exposed
out of ground contact, during natural exposure. The quantities of emissions in the leachate are related to
the surface area of the wood and can be used in scenarios for the environmental risk assessment of the
treated wood.
NOTE The leachate can also be tested for eco-toxicological effects (example: OECD 202 testing on Daphnia sp.).
1 Scope
This document specifies a method for determining the leaching of active ingredients or other compounds
from preservative treated wood by a semi-field method for Use Class 3 (outdoor above ground). The
preservative treated wood can be tested with or without subsequently surface coating or other water-
repellent treatment. The method is applicable to the testing of commercial or experimental preservatives
or paint systems applied to timber by methods appropriate to commercial practice.
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.
EN ISO 5667-3, Water quality — Sampling — Part 3: Preservation and handling of water samples
(ISO 5667-3)
3 Terms and definitions
No terms and definitions are listed in this document.
4 Description of the test method
4.1 Principle
Panels are treated, assembled and placed outdoors, out of ground contact and exposed to the normal
environmental and ecological factors which affect preservative treated wood so exposed in practice. The
rainwater is retained and the leachate is monitored by chemical analyses of the active ingredients and/or
other compounds.
4.2 Quality criteria
The validity of the analytical method for the substances in question should be determined before
conducting the test:
a) accuracy;
b) specificity;
c) limit of detection (LOD);
d) limit of quantification (LOQ);
e) precision.
NOTE 1 EN ISO 5667-3 can give guidance on the preservation and handling of water samples.
NOTE 2 This can include CAS no or chemical formulation.
4.3 Wood preservative
The test report shall state the name and other designation of the tested product, and the trade or common
name of the active ingredient(s).
NOTE Definitions can be found in the regulation n°528/2012.
Use of a coating is possible (identity and amount of coating used shall be stated in the test report).
4.4 Apparatus
4.4.1 Vessel for receiving water
Laboratory brown glass flask or plastic jars with no impurities that can influence the active ingredient.
NOTE EN ISO 5667-3 gives the good practices to preserve water samples.
The brown glass flask or plastic jars shall be protected from heat and sunlight.
The capacity of the vessels depends on the exposure scenario. If the expected annual precipitation is
approximately 700 mm and the test set-up is placed horizontal 25 l containers are recommended. If the
test set-ups are exposed vertically 5 l containers are recommended.
4.4.2 Gutter, screws, hooks
All materials used to fix and support the panels and collect the rainwater shall be made of inert materials.
Stainless steel has been found to be suitable (see Annex A).
4.4.3 Weather station
A weather station capable of monitoring the quantity of rainfall, the wind direction and wind speed at the
test site shall be used.
4.4.4 Wood working equipment
Equipment capable of producing the desired finish of the surface; e.g. fine sawn or planed.
4.4.5 Condition chamber
Conditioning chamber, well ventilated, controlled at (20 ± 2) °C and (65 ± 5) % relative humidity.
4.4.6 Mixing vessel
4.
...