FprEN 14823

SLOVENSKI STANDARD
01-januar-2026
Biološka trajnost lesa in lesnih proizvodov - Kvantitativno ugotavljanje
pentaklorofenola v lesu - Plinska kromatografska metoda
Biological durability of wood and wood-based products - Quantitative determination of
pentachlorophenol in wood - Gas chromatographic method
Biologische Dauerhaftigkeit von Holz und Holzprodukten - Quantitative Bestimmung von
Pentachlorphenol in Holz - Gaschromatographisches Verfahren
Durabilité biologique du bois et des matériaux dérivés - Analyse quantitative du
pentachlorophénol dans le bois - Méthode par chromatographie en phase gazeuse
Ta slovenski standard je istoveten z: prEN 14823
ICS:
71.040.50 Fizikalnokemijske analitske Physicochemical methods of
metode analysis
79.040 Les, hlodovina in žagan les Wood, sawlogs and sawn
timber
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
prEN 14823
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2025
ICS 71.100.50; 79.040 Will supersede CEN/TR 14823:2003
English Version
Biological durability of wood and wood-based products -
Quantitative determination of pentachlorophenol in wood
- Gas chromatographic method
Durabilité biologique du bois et des matériaux dérivés Biologische Dauerhaftigkeit von Holz und
- Analyse quantitative du pentachlorophénol dans le Holzprodukten - Quantitative Bestimmung von
bois - Méthode par chromatographie en phase gazeuse Pentachlorphenol in Holz - Gaschromatographisches
Verfahren
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
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 14823:2025 E
worldwide for CEN national Members.

prEN 14823:2025 (E)
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Safety precautions . 5
5 Principle . 5
6 Reagents . 6
7 Apparatus . 6
8 Sampling and preparation of the test sample . 7
9 Procedure . 7
Table 1 — Example of calibration solutions . 8
10 Calculation and expression of results . 11
11 Quality assurance . 12
12 Test report . 12
Annex A (informative) Results of the round robin test . 13
Table A.1 – Lab test parameters and individual experimental results . 13
Table A.2 – Statistical results . 14
Bibliography . 15

prEN 14823:2025 (E)
European foreword
This document (prEN 14823:2025) has been prepared by Technical Committee CEN/TC 38 “Biological
durability of wood and wood-based products”, the secretariat of which is held by SIS.
This document is currently submitted to the CEN Enquiry.
This document will supersede the Technical Report CEN/TR 14823:2003, which was fully revised.
prEN 14823:2025 (E)
Introduction
This document has been issued to facilitate the analysis of pentachlorophenol (PCP) in woods and panels.
Pentachlorophenol (PCP) can be present as residues from old anti-sapstain treatment.
The EN status was adopted by the CEN/TC 38, considering the need of a European standard dealing with
this topic in particular for the wooden construction products such as wood-based panels or floorings,
which are concerned by a pentachlorophenol (PCP) content required by harmonized standards for the
Construction Product regulation.
prEN 14823:2025 (E)
1 Scope
This document specifies a laboratory method of determining the pentachlorophenol content of wood. The
method is applicable to all types of pentachlorophenol (PCP) in woods and wood-based materials as well
as for the analysis of waste timber with respect to its pentachlorophenol (PCP) content.
The method described has a measurement range from 250 µg/kg up to pentachlorophenol (PCP)
contents of 5 mg/kg of dry matter. These figures refer to the given example (where an aliquot of 1 ml of
the extract is used for acetylation, see 9.3).
NOTE 1 If lower quantification limits are required, a higher volume of extract aliquot can be used for
derivatisation.
NOTE 2 This method could have some modifications with some wood species as hardwoods. In general, in the
case of complex matrix, a method using mass spectrometry can be used.
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 212, Wood preservatives — General guidance on sampling and preparation for analysis of wood
preservatives and treated timber
EN 351-2, Durability of wood and wood-based products — Preservative-treated solid wood — Part 2:
Guidance on sampling for the analysis of preservative-treated wood
EN ISO 3696, Water for analytical laboratory use — Specification and test methods (ISO 3696:1987)
3 Terms and definitions
No terms and definitions are listed in this document.
4 Safety precautions
Persons using this method should be familiar with normal analytical laboratory procedures and practice.
This method does not purport to address all the safety problems, if any, associated with its use.
It is the responsibility of the user to establish safety and health practices and to ensure compliance with
any European or national regulatory conditions.
5 Principle
Pentachlorophenol is extracted from the wood material using appropriate solvents. The extracted
pentachlorophenol is transformed to pentachlorophenol acetate by derivatisation of an aliquot of the
extract in aqueous potassium carbonate solution with acetic anhydride. The acetate derivative formed is
extracted from this aqueous solution with n-hexane and analysed by gas chromatography with electron
capture detection or mass selective detection.
Methanol, acetone or toluene are considered as convenient. Other solvents can be used. Some extraction
difficulties can occur with some wood species (e.g. hardwoods). It is recommended to crosscheck the
extraction efficiency of any other solvent or solvent mixture.
For complex mixtures, the method using mass spectrometry should be used.
prEN 14823:2025 (E)
6 Reagents
During the analysis, unless otherwise specified, use only reagents of recognized analytical grade, which
have been checked in advance as to not interfere with the analytical results, and water complying with
grade 3 as defined in EN ISO 3696.
6.1 Acetic anhydride (C H O ).
4 6 3
6.2 Methanol (CH OH).
6.3 Acetone (C H O).
3 6
6.4 Toluene (C H CH ).
6 5 3
6.5 n-Hexane (C H ).
6 14
6.6 Potassium carbonate, solution, c(K CO ) = 0,1 mol/l.
2 3
6.7 Sodium sulfate, anhydrous (Na SO ).
2 4
6.8 Pentachlorophenol (pentachlorophenol (PCP), (C Cl OH)) of GC quality.
6 5
6.9 2,4,6-tribromophenol (TBP, (C H Br OH)) of GC quality as an internal standard.
6 2 3
6.10 Certified Reference Material BCR-683 (PCP and PAH in wood).
6.11 Certified Reference Material BAM-U030 (PCP in wood).
7 Apparatus
Ordinary laboratory apparatus and the following.
Glassware should be thoroughly cleaned prior to use.
7.1 Analytical balance, accurate to 0,1 mg.
7.2 Ultra-sonic bath equipped with a thermostat capable of controlling and maintaining a
temperature of 40 °C.
7.3 Pressurized fluid extraction (PFE) system.
Pressurized fluid extraction (PFE) is an automated extraction technique that uses elevated temperature
and pressure.
7.4 Separating funnel.
7.5 Disposable Pasteur pipettes made of glass.
7.6 Volumetric pipettes.
7.7 Microlitre syringes.
7.8 Volumetric flasks.
prEN 14823:2025 (E)
7.9 Conical flasks, with screw caps provided with an insert of polytetrafluoroethylene (PTFE) or
alternatively with standard ground stoppers provided with PTFE standard ground sockets and conical
joint clips.
7.10 Extraction cell for PFE system.
7.11 Gas chromatograph equipped with a non-discriminating injection system and an electron
capture detector (ECD) or mass spectrometry (MS), with split/ splitless injector.
7.12 Separation column. Capillary column, with stationary phase of (5 %-Phenyl)-methylpolysiloxane.
NOTE Pre-column coated with deactivated silica could be used.
8 Sampling and preparation of the test sample
8.1 Sampling
Samples submitted to testing shall be prepared and conditioned in accordance with EN 351-2, EN 212, or
another suitable standard depending on the aim of the test, in particular the cutting area (sawdust or
shaving).
8.2 Preparation for analysis
Collect at least 5 to 10 g of the sample material taken according to e.g. EN 212. This sample material is
obtained with the appropriate cutting tools, thoroughly cleaned with acetone for example.
This sample material is cut by plane to shavings or ground under mild conditions (to avoid heating) to
sawdust with an approximate particle size ≤ 2,0 mm diameter.
Homogenize the ground sample material to obtain a representative sample and store it in a brown glass
vessel with screw caps with a PTFE insert. This is the test sample.
The mass submitted to test could be lower according to the shape and the type of the material tested.
9 Procedure
9.1 General
The analysis is carried out on duplicate. If results differ by more than 15 % an additional analysis shall be
carried out.
9.2 Standard solutions
9.2.1 Preparation of stock solutions (calibrant and internal standard)
Prepare or procure a standard solution containing the compounds in appropriate concentration
depending on the sensitivity of the system and the conditions diluted in an analytical solvent for
chromatography. By example:
Prepare the stock solutions by weighing about 12,5 mg of pentachlorophenol (PCP) (6.8) and TBP (6.9)
separately to the nearest of 0,01 mg and dissolve each in 25 ml methanol (6.2).
NOTE 1 These stock solutions with nominal concentrations of 0,5 mg/ml can be stored in the dark at –18 °C for
three months.
Given sufficient solubility and stability, the standard stock solution can be dissolved in other solvent than
methanol. Acetone and toluene are considered as suitable.
prEN 14823:2025 (E)
9.2.2 Preparation of working solutions
Transfer by pipette (7.6) 1,00 ml of stock pentachlorophenol (PCP) solution (9.2.1) to a 10 ml one-mark
volumetric flask (7.8) and make up to the mark with methanol (6.2) to give a solution having a nominal
concentration of 50 µg/ml pentachlorophenol (PCP). Repeat with the TBP stock solution to give a solution
having a nominal concentration of 50 µg/ml TBP.
NOTE 1 The maximum storage time of these solutions is one month at approximately 5 °C, e.g. in a refrigerator.
Given sufficient solubility and stability, the working solutions can be dissolved in other solvent than
methanol. Acetone and toluene are considered as suitable.
9.2.3 Preparation of calibration standards
To a series of 100 ml one-mark volumetric flasks (7.8), transfer 25 µl, 50 µl, 100 µl, 250 µl and 500 µl of
pentachlorophenol (PCP) working solution (9.2.2). To each of the five flasks and on
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