1、March 2016 English price group 11No 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!%MW“2429952www.din.deDIN
2、 EN ISO 12460-3Wood-based panels Determination of formaldehyde release Part 3: Gas analysis method (ISO 12460-3:2015);English version EN ISO 12460-3:2015,English translation of DIN EN ISO 12460-3:2016-03Holzwerkstoffe Bestimmung der Formaldehydabgabe Teil 3: Gasanalyse-Verfahren (ISO 12460-3:2015);E
3、nglische Fassung EN ISO 12460-3:2015,Englische bersetzung von DIN EN ISO 12460-3:2016-03Panneaux base de bois Dtermination du dgagement de formaldhyde Partie 3: Mthode danalyse de gaz (ISO 12460-3:2015);Version anglaise EN ISO 12460-3:2015,Traduction anglaise de DIN EN ISO 12460-3:2016-03SupersedesD
4、IN EN 717-2:1995-01 andDIN EN 717-2 Corrigendum 1:2003-06www.beuth.deDocument comprises 20 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.03.16 DIN EN ISO 12460-3:2016-03 2 A comma is used as the decimal marker. National forew
5、ord This document (EN ISO 12460-3:2015) 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 preparation was DIN-Normenausschuss Holzwir
6、tschaft 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 717-2:1995-01. The objective of the revision was to improve the detection limit and the reproducibility of t
7、he 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 16979 DIN EN 322 ISO 16999 DIN EN 326-1 ISO 12460-4 DIN EN ISO 12460-4 ISO 12460-5 DIN EN ISO 12460-5 ISO 14184-1 DIN EN ISO 1
8、4184-1 Amendments This standard differs from DIN EN 717-2:1995-01 and DIN EN 717-2 Corrigendum 1:2003-06 as follows: a) in 6.1, the preparation of test pieces has been described in more detail; b) in 6.2, the recommendation to carry out the formaldehyde determination not later than 72 h after sampli
9、ng has been added; c) in 6.4, conditioning for sampling and testing in case of dispute has been included; d) in 7.1 and 8.2.2, the procedure and evaluation of a third determination have been rendered more precise; e) in 7.3, the use of smaller gas wash bottles and volumetric flasks to improve the se
10、nsitivity has been included as an option; f) in 7.4.3, the use of a mixed reagent to reduce the amounts of aqueous solution and hence improve the sensitivity has been included as an option; DIN EN ISO 12460-3:2016-03 3 g) in 7.4.3, the temperature of the water bath has been increased to 60 C and the
11、 cooling procedure has been modified; h) in 7.4.4.1, the minimum interval for checking the calibration curve has been extended to once a month; i) in Clause 9, age and treatment of the sample have been included in the test report; j) in Figure 2, the calibration curve has been modified. Previous edi
12、tions DIN 52368: 1984-09 DIN EN 717-2: 1995-01 DIN EN 717-2 Corrigendum 1: 2003-06 DIN EN ISO 12460-3:2016-03 4 National Annex NA (informative) Bibliography DIN EN 322, Wood-based panels Determination of moisture content DIN EN 326-1, Wood-based panels Sampling, cutting and inspection Part 1: Sampli
13、ng and cutting of test pieces and expression of test results DIN EN ISO 12460-4, Wood-based panels Determination of formaldehyde release Part 4: Desiccator method DIN EN ISO 12460-5, Wood-based panels Determination of formaldehyde release Part 5: Extraction method DIN EN ISO 14184-1, Textiles Determ
14、ination of formaldehyde Part 1: Free and hydrolysed formaldehyde (water extraction method) EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 12460-3 November 2015 ICS 79.060.01 Supersedes EN 717-2:1994English Version Wood-based panels - Determination of formaldehyde release - Part 3: Gas anal
15、ysis method (ISO 12460-3:2015)Panneaux base de bois - Dtermination du dgagement de formaldhyde - Partie 3: Mthode danalyse de gaz (ISO 12460-3:2015) Holzwerkstoffe - Bestimmung der Formaldehydabgabe - Teil 3: Gasanalyse-Verfahren (ISO 12460-3:2015) This European Standard was approved by CEN on 29 Au
16、gust 2015. 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 ob
17、tained 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
18、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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Irela
19、nd, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Cent
20、re: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 12460-3:2015 EEuropean foreword .31 Scope . 62 Normative references 63 Principle 64 Reagents 65 Apparatus . 75.1 Main composites of test
21、 apparatus (see Figure 1) . 75.2 Laboratory equipment . 76 Sampling and preparation of test pieces . 86.1 Preparation of test pieces 86.2 Selection of test pieces for factory production control 86.3 Selection of test pieces for other purposes 96.4 Selection of test pieces in case of dispute 97 Proce
22、dure. 97.1 Number of determinations . 97.2 Determination of moisture content 97.3 Determination of formaldehyde release . 97.4 Determination of formaldehyde content of the aqueous solutions 107.4.1 General. 107.4.2 Principle . 107.4.3 Analytical Procedure . 107.4.4 Calibration curve 108 Expression o
23、f results . 128.1 Gas analysis value 128.2 Calculation of results 128.2.1 Calculation of results of test pieces 128.2.2 Calculation of emission report value . 138.3 Moisture content 139 Test report 13Bibliography .16Contents PageDIN EN ISO 12460-3:2016-03 EN ISO 12460-3:2015 (E)2Foreword 4European f
24、oreword This document (EN ISO 12460-3:2015) 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 of a national standard
25、, either by publication of an identical text or by endorsement, at the latest by May 2016, and conflicting national standards shall be withdrawn at the latest by May 2016. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or
26、 CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 717-2:1994. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Bel
27、gium, 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, Spain, Sweden, Switz
28、erland, Turkey and the United Kingdom. Endorsement notice The text of ISO 12460-3:2015 has been approved by CEN as EN ISO 12460-3:2015 without any modification. DIN EN ISO 12460-3:2016-03 EN ISO 12460-3:2015 (E)3 ForewordISO (the International Organization for Standardization) is a worldwide federat
29、ion 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 committe
30、e. 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 th
31、ose 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
32、(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 do
33、cument 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 ISO specific terms an
34、d 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-based panels.This secon
35、d edition cancels and replaces the first edition (ISO 12460-3:2008), 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 12460-3:2008, the followi
36、ng modifications have been made:a) in 6.1 preparation of test pieces is described more in detail;b) in 6.2 recommendation of maximum time 72 h after sampling for formaldehyde determination is added;c) in 6.4 conditioning for sampling and testing in case of dispute is added;d) in 7.1 and 8.2.2 proced
37、ure and evaluation of third determination are modified;e) in 7.3 use of smaller gas wash bottles and volumetric flasks to improve the sensitivity is included as an option;f) in 7.4.3 the use of a mixed reagent is included as an option to reduce the amounts of aqueous solution and hence improve the s
38、ensitivity;g) in 7.4.3 temperature of water bath increased to 60 C and cooling procedure is modified;h) in 7.4.4.1 minimum interval of check of the calibration curve is extended to once a month;i) in Clause 9 age and treatment of the sample are included in the test report;j) in Figure 2 calibration
39、curve is modified.ISO 12460 consists of the following parts, under the general title Wood-based panels Determination of formaldehyde release:DIN EN ISO 12460-3:2016-03 EN ISO 12460-3:2015 (E)4 Part 1: Formaldehyde emission by the 1-cubic-metre chamber method Part 3: Gas analysis method Part 4: Desic
40、cator method Part 5: Extraction method (called the perforator method)Additional parts dealing with small-scale chamber method is planned.DIN EN ISO 12460-3:2016-03 EN ISO 12460-3:2015 (E)5 1 ScopeThis part of ISO 12460 specifies a procedure for determination of accelerated formaldehyde release from
41、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 referencesThe following documents
42、, 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 (including any amendments) applies.ISO 16979, Wood-based panels De
43、termination of moisture contentISO 16999, Wood-based panels Sampling and cutting of test pieces3 PrincipleA 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 p
44、ieces 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 formal
45、dehyde release is calculated from this concentration, the sampling time, and the exposed area of the test pieces and is expressed in milligrams per square meter and hour (mg/m2h).4 ReagentsReagents of recognized analytical purity and distilled or demineralised water (referred throughout the followin
46、g text as distilled water) shall be used for the analysis.4.1 4 ml Acetylacetone solution are added to a 1 000 ml volumetric flask and made up to the mark with distilled water.4.2 200 g ammonium acetate solution are dissolved with distilled water in a 1 000 ml volumetric flask and made up to the mar
47、k. Optionally, a premixed reagent of acetylacetone and ammonium acetate as described in ISO 12460-4 can be used.4.3 Formaldehyde solution commercially available (concentration typically between 35 % mass fraction to 40 % mass fraction).DIN EN ISO 12460-3:2016-03 EN ISO 12460-3:2015 (E)6 4.4 Standard
48、 iodine solution c(l2) = 0,05 mol/l4.5 Standard sodium thiosulphate solution c(Na2S2O3) = 0,1 mol/l4.6 Standard sodium hydroxide solution c(NaOH) = 1 mol/l4.7 Standard sulphuric acid solution c(H2SO4) = 1 mol/l4.8 Starch solution 1 % by mass5 Apparatus5.1 Main composites of test apparatus (see Figure 1)5.1.1 Air filter (1).5.1.2 Wash bottle, 500 ml, containing ca. 400 ml distilled water (2).5.1.3 Desiccator, 500 ml, conta
