1、May 2016 English price group 12No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 79.060.01!%UVa“2505162www.din.deDIN
2、EN ISO 12460-5Wood-based panels Determination of formaldehyde release Part 5: Extraction method (called the perforator method) (ISO 12460-5:2015);English version EN ISO 12460-5:2015,English translation of DIN EN ISO 12460-5:2016-05Holzwerkstoffe Bestimmung der Formaldehydabgabe Teil 5: Extraktionsve
3、rfahren (genannt Perforatormethode) (ISO 12460-5:2015);Englische Fassung EN ISO 12460-5:2015,Englische bersetzung von DIN EN ISO 12460-5:2016-05Panneaux base de bois Dtermination du dgagement de formaldhyde Partie 5: Mthode dextraction (dite mthode au perforateur) (ISO 12460-5:2015);Version anglaise
4、 EN ISO 12460-5:2015,Traduction anglaise de DIN EN ISO 12460-5:2016-05SupersedesDIN EN 120:1992-08www.beuth.deDocument comprises 24 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.05.16 DIN EN ISO 12460-5:2016-05 2 A comma is u
5、sed as the decimal marker. National foreword This document (EN ISO 12460-5:2016) has been prepared by Technical Committee CEN/TC 112 “Wood-based panels” (Secretariat: DIN, Germany) in collaboration with Technical Committee ISO/TC 89 “Wood-based panels”. The responsible German body involved in its pr
6、eparation was DIN-Normenausschuss Holzwirtschaft und Mbel (DIN Standards Committee Timber and Furniture), Working Committee NA 042-02-15 AA Holzwerkstoffe Spiegelausschuss zu CEN/TC 112 und ISO/TC 89. This document supersedes DIN EN 120:1992-08. The objective of the revision was to improve the detec
7、tion limit and the reproducibility of the method with regard to boards with low formaldehyde content. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 12460-3 DIN EN ISO 12460-3 ISO 12460-4 DIN EN ISO 12460-4 ISO 14184-1 DIN EN ISO 14184
8、-1 ISO 16979 DIN EN 322 ISO 16999 DIN EN 326-1 Amendments This standard differs from DIN EN 120:1992-08 as follows: a) in 5.3, a recommendation for the cell path length for low emitting samples has been added; b) in 6.4, the relative humidity for the conditioning climate has been increased to (50 5)
9、 %; c) in 7.1 and 8.2, the procedure and evaluation of a third extraction have been modified; d) in 7.3, the accuracy of weighing of test pieces has been increased and a higher mass of the test pieces has been added as an option for low emitting boards; e) in 7.4, the precision of the blank test has
10、 been increased; f) in 7.5.1, the fluorimetric determination of formaldehyde has been added as an alternative method; g) in 7.5.4, the temperature of the water bath has been increased to 60 C; h) in 8.2, modification factors for the moisture content have been included; i) the calibration curve in Fi
11、gure 4 has been modified; j) Annex A for calibration and quality assurance has been added. Previous editions DIN EN 120: 1984-10, 1992-08 DIN EN ISO 12460-5:2016-05 3 National Annex NA (informative) Bibliography DIN EN 322, Wood-based panels Determination of moisture content DIN EN 326-1, Wood-based
12、 panels Sampling, cutting and inspection Part 1: Sampling and cutting of test pieces and expression of test results DIN EN ISO 12460-3, Wood-based panels Determination of formaldehyde release Part 3: Gas analysis method DIN EN ISO 12460-4, Wood-based panels Determination of formaldehyde release Part
13、 4: Desiccator method DIN EN ISO 14184-1, Textiles Determination of formaldehyde Part 1: Free and hydrolysed formaldehyde (water extraction method) DIN EN ISO 12460-5:2016-05 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 12460-5 December 2015 ICS 79.060.
14、01 Supersedes EN 120:1992English Version Wood-based panels - Determination of formaldehyde release - Part 5: Extraction method (called the perforator method) (ISO 12460-5:2015) Panneaux base de bois - Dtermination du dgagement de formaldhyde - Partie 5: Mthode dextraction (dite mthode au perforateur
15、)(ISO 12460-5:2015) Holzwerkstoffe - Bestimmung der Formaldehydabgabe -Teil 5: Extraktionsverfahren (genannt Perforatormethode) (ISO 12460-5:2015) This European Standard was approved by CEN on 29 August 2015. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate t
16、he 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 Standar
17、d 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 nation
18、al 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, Slova
19、kia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means
20、reserved worldwide for CEN national Members. Ref. No. EN ISO 12460-5:2015 EEuropean foreword .3Introduction 61 Scope . 72 Normative references 73 Principle 74 Reagents 75 Apparatus . 76 Test pieces . 96.1 General . 96.2 Sampling . 96.3 Sampling for factory production control 96.4 Sampling for other
21、purposes 97 Procedure. 97.1 Number of extractions 97.2 Determination of moisture content 97.3 Extraction in the perforator 107.4 Blank test 107.5 Determination of formaldehyde in the extract . 107.5.1 General. 107.5.2 Principle . 117.5.3 Reagents . 117.5.4 Analytical procedure . 117.5.5 Calibration
22、curve 117.6 Quality assurance. 128 Expression of results . 138.1 Moisture content 138.2 Perforator value 139 Test report 14Annex A (normative) Perforator extraction efficiency test Calibration of the perforator method .19Bibliography .20Contents PageDIN EN ISO 12460-5:2016-05 EN ISO 12460-5:2015 (E)
23、2Foreword 4European foreword This document (EN ISO 12460-5:2015) 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 o
24、f a national standard, either by publication of an identical text or by endorsement, at the latest by June 2016, and conflicting national standards shall be withdrawn at the latest by June 2016. Attention is drawn to the possibility that some of the elements of this document may be the subject of pa
25、tent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 120:1992. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European S
26、tandard: 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, Slovakia, Slovenia,
27、 Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 12460-5:2015 has been approved by CEN as EN ISO 12460-5:2015 without any modification. DIN EN ISO 12460-5:2016-05 EN ISO 12460-5:2015 (E)3 ForewordISO (the International Organization for Standardization) i
28、s 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 represe
29、nted 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
30、 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/IE
31、C 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
32、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 on the meaning of
33、ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 89, Wood-ba
34、sed panels.This second edition cancels and replaces the first edition (ISO 12460-5:2011), which has been technically revised.The objective of the revision was to improve the detection limit and the reproducibility of the method with regard to boards with low formaldehyde content.Compared to ISO 1246
35、0-5:2011, the following modifications have been made:a) in 5.3 recommendation of cell length for low emitting samples is added;b) in 6.4 relative humidity for conditioning climate is increased to (65 5) %;c) in 7.1 and 8.2 procedure and evaluation of third extraction are modified;d) in 7.3 accuracy
36、of weighing of test pieces enhanced and higher mass of the test pieces is added as an option for low emitting boards;e) in 7.4 precision of blank test is improved;f) in 7.5.1 fluorimetric determination of formaldehyde is added an option;g) in 7.5.4 temperature of water bath is increased to 60 C;h) i
37、n 8.2 modification factors for moisture content is included;i) in Figure 4 calibration curve is modified;j) Annex A for calibration and quality assurance is added.ISO 12460 consists of the following parts, under the general title Wood-based panels Determination of formaldehyde release: Part 1: Forma
38、ldehyde emission by the 1-cubic-metre chamber methodDIN EN ISO 12460-5:2016-05 EN ISO 12460-5:2015 (E)4 Part 3: Gas analysis method Part 4: Desiccator method Part 5: Extraction method (called the perforator method)Additional parts dealing with small-scale chamber method is planned.DIN EN ISO 12460-5
39、:2016-05 EN ISO 12460-5:2015 (E)5 IntroductionThe “perforator value” as determined by the method laid down in this part of ISO 12460 is considered to be the “formaldehyde content” of the tested board.The test results are dependent on the specific board conditions at the time of testing.The emission
40、of formaldehyde from wood-based panels (e.g. particleboard, plywood, fibreboard, OSB) is a complex process. For a given board, the test result depends upon the age, ageing conditions, moisture content, etc., at the time of testing.In addition, the correlation between the perforator value and the for
41、maldehyde emission of the board depends on the type of board.DIN EN ISO 12460-5:2016-05 EN ISO 12460-5:2015 (E)6 1 ScopeThis part of ISO 12460 specifies an extraction method known as the “perforator method”. It is used for the determination of the formaldehyde content of unlaminated and uncoated woo
42、d-based panels.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (inclu
43、ding any amendments) applies.ISO 16979, Wood-based panels Determination of moisture contentISO 16999, Wood-based panels Sampling and cutting of test pieces3 PrincipleThe formaldehyde is extracted from test pieces by means of boiling toluene and then transferred into distilled or demineralized water.
44、 The formaldehyde content of this aqueous solution is determined photometrically by the acetylacetone method.4 ReagentsFor the analysis, only reagents of analytical quality and distilled or demineralized water shall be used.4.1 Toluene, which is free from water and from impurities which may interfer
45、e with the test.4.2 Acetylacetone, of analytical grade.4.3 Ammonium acetate, of analytical grade.4.4 Formaldehyde solution.Commercially available formaldehyde solution (concentration typically between 35 % mass fraction to 40 % mass fraction).5 Apparatus5.1 Precision balance, with 0,01 g scale inter
46、vals.5.2 Well-ventilated oven, capable of maintaining a temperature of (103 2) C.DIN EN ISO 12460-5:2016-05 EN ISO 12460-5:2015 (E)7 5.3 Spectrophotometer, capable of measuring absorbance at 412 nm. A cell of 50 mm path length is recommended, especially for low emitting samples.5.4 Extraction appara
47、tus.The apparatus consists of the following: spiral condenser (Dimroth cooler), total length: approximately 400 mm, cone 45/40, socket 29/32 (item reference 2); conical adaptor, socket 45/40, cone 71/51 (item reference 3); filter insert, porosity P 160 (100 pm to 160 pm), bowl and filter diameters:
48、60 mm (item reference 4); perforator attachment, 1 000 ml, with stopcock (4 mm bore), socket 71/51, cone 29/32 (item reference 5); conical adaptor, socket 29/32, cone 45/40 (item reference 8); 1 000 ml round bottom flask, socket 45/40 (item reference 9); (double) bulbed tube, cone 29/32 (length: approximately 380 mm), exter
