SIST EN ISO 12460-3:2023

SLOVENSKI STANDARD
01-december-2023
Nadomešča:
SIST EN ISO 12460-3:2020
Lesne plošče - Ugotavljanje sproščanja formaldehida - 3. del: Metoda plinske
analize (ISO 12460-3:2023)
Wood-based panels - Determination of formaldehyde release - Part 3: Gas analysis
method (ISO 12460-3:2023)
Holzwerkstoffe - Bestimmung der Formaldehydabgabe - Teil 3: Gasanalyse-Verfahren
(ISO 12460-3:2023)
Panneaux à base de bois - Détermination du dégagement de formaldéhyde - Partie 3:
Méthode d'analyse de gaz (ISO 12460-3:2023)
Ta slovenski standard je istoveten z: EN ISO 12460-3:2023
ICS:
79.060.01 Lesne plošče na splošno Wood-based panels in
general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 12460-3
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2023
EUROPÄISCHE NORM
ICS 79.060.01 Supersedes EN ISO 12460-3:2020
English Version
Wood-based panels - Determination of formaldehyde
release - Part 3: Gas analysis method (ISO 12460-3:2023)
Panneaux à base de bois - Détermination du Holzwerkstoffe - Bestimmung der Formaldehydabgabe
dégagement de formaldéhyde - Partie 3: Méthode - Teil 3: Gasanalyse-Verfahren (ISO 12460-3:2023)
d'analyse de gaz (ISO 12460-3:2023)
This European Standard was approved by CEN on 6 August 2023.

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. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists 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.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 12460-3:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 12460-3:2023) has been prepared by Technical Committee ISO/TC 89 "Wood-
based panels" in collaboration with Technical Committee CEN/TC 112 “Wood-based panels” the
secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by March 2024, and conflicting national standards shall
be withdrawn at the latest by March 2024.
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 supersedes EN ISO 12460-3:2020.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: 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 the
United Kingdom.
Endorsement notice
The text of ISO 12460-3:2023 has been approved by CEN as EN ISO 12460-3:2023 without any
modification.
INTERNATIONAL ISO
STANDARD 12460-3
Fourth edition
2023-09
Wood-based panels — Determination
of formaldehyde release —
Part 3:
Gas analysis method
Panneaux à base de bois — Détermination du dégagement de
formaldéhyde —
Partie 3: Méthode d'analyse de gaz
Reference number
ISO 12460-3:2023(E)
ISO 12460-3:2023(E)
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 12460-3:2023(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagents . 1
6 Apparatus . 2
7 Sampling and preparation of test pieces . 4
7.1 Preparation of test pieces . 4
7.2 Selection of test pieces for factory production control . 5
7.3 Selection of test pieces for other purposes . 5
7.4 Preparation of test pieces in case of dispute . 5
8 Procedure .5
8.1 Number of determinations . 5
8.2 Determination of moisture content . 5
8.3 Determination of formaldehyde release . 5
8.3.1 General . 5
8.3.2 Determination of formaldehyde release — Option 1 . 7
8.3.3 Determination of formaldehyde release — Option 2 . 7
8.3.4 Determination of formaldehyde release — Option 3 . 7
8.3.5 Determination of formaldehyde release — Option 4 . 7
8.4 Determination of formaldehyde content of the absorber solutions . 8
8.4.1 General . 8
8.4.2 Principle . 8
8.4.3 Analytical procedure . 8
8.4.4 Calibration curve. 8
9 Expression of results .10
9.1 Gas analysis value . 10
9.2 Calculation of results . 10
9.2.1 Calculation of results of test pieces . 10
9.2.2 Calculation of emission report value . 11
9.3 Moisture content . 11
10 Test report .11
Bibliography .13
iii
ISO 12460-3:2023(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.
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 89, Wood based panels, in collaboration
with the European Committee for Standardization (CEN) Technical Committee CEN/TC 112, Wood
based panels, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna
Agreement).
This fourth edition cancels and replaces the third edition (ISO 12460-3:2020), which has been
technically revised.
The main changes are as follows:
— laser spectroscopy introduced as a further analytical procedure;
— ready to use formaldehyde standards considered in 8.4.4.3.
A list of all parts in the ISO 12460 series can be found on the ISO website.
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
INTERNATIONAL STANDARD ISO 12460-3:2023(E)
Wood-based panels — Determination of formaldehyde
release —
Part 3:
Gas analysis method
1 Scope
This document specifies a procedure for determination of accelerated formaldehyde release from
uncoated and coated wood-based panels using the gas analysis method. The procedure is also suitable
for the testing of other materials (e.g. edge bands, floor coverings, foams, foils, laminated wood
products, veneered wood products, coated wood products).
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.
ISO 16979, Wood-based panels — Determination of moisture content
ISO 16999, Wood-based panels — Sampling and cutting of test pieces
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological 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
A test piece of known surface area is placed in a closed chamber in which the temperature, humidity,
airflow, and pressure are controlled to defined values. Formaldehyde released from the test pieces
mixes with the air in the chamber. This air is continually drawn from the chamber and passes through
gas wash bottles, containing water, which absorbs the released formaldehyde. At the end of the test,
the formaldehyde concentration is determined photometrically or fluorimetrically. The formaldehyde
release is calculated from this concentration, the sampling time, and the exposed area of the test pieces
2·
and is expressed in milligrams per square meter and hour (mg/m h).
5 Reagents
Reagents of recognized analytical purity and distilled or demineralised water (referred throughout the
following text as distilled water) shall be used for the analysis.
5.1 4 ml acetylacetone solution are added to a 1 000 ml volumetric flask and made up to the mark
with distilled water.
ISO 12460-3:2023(E)
5.2 200 g ammonium acetate solution are dissolved with distilled water in a 1 000 ml volumetric
flask and made up to the mark.
Optionally, a premixed reagent of acetylacetone and ammonium acetate as described in ISO 12460-4
can be used.
5.3 Formaldehyde solution, commercially available (concentration typically between
35 % mass fraction to 40 % mass fraction).
5.4 Standard iodine solution, c(l ) = 0,05 mol/l.
5.5 Standard sodium thiosulphate solution, c(Na S O ) = 0,1 mol/l.
2 2 3
5.6 Standard sodium hydroxide solution, c(NaOH) = 1 mol/l.
5.7 Standard sulphuric acid solution, c(H SO ) = 1 mol/l.
2 4
5.8 Starch solution, 1 % mass fraction.
6 Apparatus
6.1 Main composites of test apparatus (see Figure 1).
6.1.1 Dust or particle filter.
6.1.2 Formaldehyde filter (bottle filled with water, silicagel or other formaldehyde absorber).
6.1.3 Desiccator, 500 ml, containing silica gel.
6.1.4 Air pump.
6.1.5 Needle valve.
6.1.6 Equipment for measuring rate of air flow through apparatus.
NOTE Needle valve and equipment for measuring rate of air flow can be replaced by a mass flow controller.
6.1.7 Test chamber (diameter: 90 mm to 100 mm with a length which gives an internal volume of
(4 000 ± 200) ml with double casing of stainless steel or glass.
6.1.8 Heating equipment for air (e.g. copper coil inside the double casing).
6.1.9 Thermostat.
6.1.10 Magnetic valves.
6.1.11 Pairs of gas wash bottles, 100 ml or optionally, pairs of gas wash bottles, 30 ml.
6.1.12 Pressure monitor.
6.1.13 Temperature monitor.
ISO 12460-3:2023(E)
6.1.14 Test piece holder, constructed as a shelf with three rods made from stainless steel or another
inert material.
NOTE The test apparatus described in Figure 1 is based on a waterborne heating system. A test apparatus
with an electrical heating system can be used optionally.
Key
1 dust or particle filter 13 outlet of test air
2 formaldehyde filter 14 heating medium (inlet)
3 desiccator 15 insulation
4 air pump 16 test chamber door
5 needle valve 17 double casing
6 equipment for measurement of air flow 18 inlet for air (heating coil)
7 test chamber 19 magnetic valve for purging
8 heating coil 20 connection tube
9 thermostat 21 pairs of wash bottles
10 magnetic valves 22 pressure monitor
11 inlet of air (test chamber) 23 temperature monitor
12 heating medium (outlet) 24 test piece holder
Figure 1 — Gas analysis test apparatus
6.2 Laboratory equipment
6.2.1 Ventilated oven, as described in ISO 16979 for determination of moisture content (if requested).
ISO 12460-3:2023(E)
6.2.2 Spectrophotometer, with cells of 50 mm optical path length and capable of measuring
absorbance at 412 nm.
6.2.3 Water bath, capable of maintaining a temperature of (60 ± 1) °C.
6.2.4 Water bath, capable of maintaining a temperature in the range of 20 °C to 25 °C.
6.2.5 Six volumetric flasks, 100 ml (calibrated at 20 °C).
6.2.6 Four volumetric flasks, 250 ml or optionally, four volumetric flasks, 100 ml (calibrated at
20 °C).
6.2.7 Two volumetric flasks, 1 000 ml (calibrated at 20 °C).
6.2.8 Volumetric pipettes (calibrated at 20 °C), 1 ml, 2 ml, 5 ml, 10 ml, 15 ml, 20 ml, 25 ml, 30 ml,
50 ml, 100 ml.
6.2.9 Six flasks, 50 ml (with stoppers).
6.2.10 Microburette.
6.2.11 Burette, 50 ml, graduated (calibrated at 20 °C).
6.2.12 Balance, capable of measuring to 0,00 1 g.
7 Sampling and preparation of test pieces
7.1 Preparation of test pieces
Three test pieces, each with the dimensions of (400 ± 1) mm × (50 ± 1) mm × board thickness, shall be
prepared for the determination of formaldehyde release giving a total emitting surface area of 0,04 m .
If the sample available does not allow the preparation of test pieces of the specified dimension, then the
combined emitting surface area of the test pieces(s) should be as close as possible to 0,04 m .
For testing layer glued materials (e.g. plywood, veneered particleboard), test
...