1、February 2016 English price group 15No 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!%LS/“2414812www.din.d
2、eDIN EN 16718Wood and wood-based products Dosage of the total organic carbon (TOC) in wood and wood based products;English version EN 16718:2015,English translation of DIN EN 16718:2016-02Holz und Holzprodukte Bestimmung des gesamten organischen Kohlenstoffs (TOC) in Holz und Holzprodukten;Englische
3、 Fassung EN 16718:2015,Englische bersetzung von DIN EN 16718:2016-02Produits de prservation du bois et matriaux base de bois Dosage du carbone organique total (COT) dans les bois et matriaux base de bois;Version anglaise EN 16718:2015,Traduction anglaise de DIN EN 16718:2016-02www.beuth.deDTranslati
4、on by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.Document comprises 31 pages 03.16-DIN EN 16718:2016-02 2 A comma is used as the decimal marker. National foreword This document (EN 16718:2015) has been prepared by Technical Committee CEN/TC 38
5、 “Durability of wood and wood-based products” (Secretariat: AFNOR, France). The responsible German body involved in its preparation was DIN-Normenausschuss Holzwirtschaft und Mbel (DIN Standards Committee Timber and Furniture), Working Committee NA 042-03-06 AA Spiegel-ausschuss zu CEN/TC 38 und ISO
6、/TC 165/SC 1 Dauerhaftigkeit von Holz und Holzprodukten. EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 16718 November 2015 ICS 79.060.01 English Version Wood and wood based products - Dosage of the total organic carbon (TOC) in wood and wood based products Produits de prservation du bois et m
7、atriaux base de bois - Dosage du carbone organique total (COT) dans les bois et matriaux base de bois Holz und Holzprodukte - Bestimmung des gesamten organischen Kohlenstoffs (TOC) in Holz und Holzprodukten This European Standard was approved by CEN on 12 September 2015. CEN members are bound to com
8、ply 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-CENELE
9、C 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 s
10、ame 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, Ireland, Italy, Latvia, Lithuania, Luxembour
11、g, 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 Centre: Avenue Marnix 17, B-1000 Brussels 2
12、015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 16718:2015 E-EN 16718:2015 (E) 2 Contents Page European foreword . 4 Introduction 5 1 Scope 7 2 Normative references 7 3 Terms and definitions . 7 4 Principle . 7 5 Reagents and p
13、roducts 8 6 Apparatus . 8 7 Procedure. 8 7.1 Preparation of the sample . 8 7.2 Water content . 8 7.3 Dosage . 9 7.3.1 General 9 7.3.2 TC dosage . 9 7.3.3 TIC dosage 9 7.4 Calibration . 9 7.5 Control measurements . 10 7.6 Evaluation . 10 7.7 13C measurement by IRMS (Isotope Ratio Mass Spectrometer) 1
14、1 7.7.1 Material and methods . 11 7.7.2 13C isotope . 12 7.7.3 18O isotope 12 7.7.4 2H isotope (Deuterium) 12 7.7.5 15N Isotopes 12 7.7.6 Multi-isotopic determinations: 13C, 18O and 2H in wood and tree . 12 8 Performance characteristics 13 9 Test report 13 Annex A (informative) Results of the valida
15、tion method . 14 A.1 General . 14 A.2 Response function 14 A.2.1 General . 14 A.2.2 Total carbon . 15 A.2.3 Inorganic carbon 16 A.3 Trueness 17 A.3.1 General . 17 A.3.2 Total carbon . 18 A.3.3 Inorganic carbon 18 A.4 Precision 18 A.4.1 General . 18 A.4.2 Total carbon . 18 A.4.3 Inorganic carbon 20 A
16、.5 Measurement uncertainty 21 A.5.1 General . 21 DIN EN 16718:2016-02 EN 16718:2015 (E) 3 A.5.2 Total carbon 21 A.5.3 Inorganic carbon . 22 A.6 Accuracy . 22 A.6.1 General . 22 A.6.2 Total carbon 22 A.6.3 Inorganic carbon . 24 A.7 Linearity of results . 25 A.7.1 Total carbon 25 A.7.2 Inorganic carbo
17、n . 26 A.8 Quantification limit and dosage interval . 27 A.8.1 Total carbon 27 A.8.2 Inorganic carbon . 27 A.9 Conclusion . 27 Annex B (informative) Measurements on wood species and wood-based materials . 28 Bibliography . 29 DIN EN 16718:2016-02 EN 16718:2015 (E) 4 European foreword This document (
18、EN 16718:2015) has been prepared by Technical Committee CEN/TC 38 “Durability of wood and wood-based products”, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the lat
19、est 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 CENELEC shall not be held responsible for identifying any or all such pat
20、ent rights. 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, Former Yugoslav Republic of Macedonia,
21、 France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 16718:2016-02 EN 16718:2015 (E) 5 Introduction Bio-based products fr
22、om forestry and agriculture have a long history of application. The last decades have seen the emergence of new bio-based products in the market. Acknowledging the need for common standards for bio-based products, the European Commission issued mandate M/492, resulting in a series of standards devel
23、oped by CEN/TC 411. For business to business transactions, claims which are relevant to describe characteristics of bio-based products in a business to business environment will be given in the near future. Data are by consequence required to generate and transfer information in the industrial chain
24、 and/or as an input for product specific standards and certification schemes. The work to be done by the CEN/TC 411/WG 3 concerns the determination of the bio-based carbon in order to determine the level of bio-based content of a product or materials. A document (CEN/TR 16721) has been prepared by T
25、echnical Committee CEN/TC 411 “Bio-based products”, and describes a list of methods and an “overview of methods to determine the bio-based content and related methods” for Bio-based products. As part of the task force of CEN/TC 175, devoted to carbon foot printing and LCA, a European Standard was pu
26、blished on the simplified calculation of the amount of biomass carbon stored in wood (using 50 % of the anhydrous wood mass): EN 16449. This standard EN 16718 describes the methods based on analytical measurements. These methods can be considered as complementary to the radiocarbon based method and
27、methods based on evaluation by calculation (mass balance approaches). One of these analytical methods is a method based on measurement of stable isotopic ratio present in biomass in order to determine the biomass content of the product. The development of this method described in this report is ongo
28、ing with close collaboration between FCBA and the “Institute des Sciences Analytiques” CNRS in order to determine the bio-based content of wood raw materials, glues and panels made with these raw materials for end use manufactured products with this new method. The objective is to propose correlated
29、 analysis (with the TOC method proposed by FCBA) to determine the carbon content to purpose a quick and low cost method easy to handle. References: http:/www.biobasedeconomy.eu/standardisation/cen-tc411/ http:/www2.afnor.org/espace_normalisation/structure.aspx?commid=86489 The tests that have result
30、ed in the specification of this document were performed in the context of work conducted by the FCBA timber certification body Technological Institute aimed at determining a method for supplying data on organic carbon contents that could be used to calculate carbon balances. The storage of biomass c
31、arbon in wood-based products is the preservation of the carbon absorbed by the tree from atmospheric CO2through photosynthesis. The carbon thus captured in the material is of benefit to the climate throughout the lifespan of the product, which can be several dozen years for a construction product, f
32、or example. The French Standard NF P01-010 (2004), which lays out the format of environmental and health statements (FDES) for construction products, provides the option of indicating the following supplementary information, in addition to the “Climate change” indicator, which is calculated from the
33、 flows of greenhouse gases associated with the product life cycle: “for some construction products (e.g. plant-based products), CO2 storage during the “service life” stage can be given if measurements are taken based on standardized test methods.” DIN EN 16718:2016-02 EN 16718:2015 (E) 6 Furthermore
34、, the Guide to Best Practices on environmental labelling of mass-market consumer products (BP X30-323) includes in Annex G: “Carbon accounting integrating time lag” which also requires knowledge of the biomass carbon contents of the products. The purpose of this document is therefore to propose a la
35、boratory measurement method of the amount of biomass carbon that will provide values of carbon or CO2equivalent stored in wood-based products, with the aim to integrate this information in the environmental statements of these products according to the texts referenced above. While measurement is no
36、t systematically necessary for solid wood products, for example, given the common knowledge on the densities of the various wood species and on the proportion of carbon contained in wood, this experimental measurement may prove to be necessary for products made of wood-based composite materials. The
37、 organic carbon contained in wood and wood-based materials is found in several different forms. Cumulative measurements, such as total organic carbon (TOC), need to be used. Isotopic ratio enables the differentiation between synthetic and natural products. IRMS (Isotope Ratio Mass Spectrometer) is a
38、 complementary method to the TOC method by an identification of the isotope 13C: both techniques are necessary to give reliable data on a bio-based content on a wood based material such as panel, board, and woods containing chemicals in general. A study is currently in progress in France on wood bas
39、ed materials: the results will enable to improve this present document and to give data with multi-isotopic determinations (13C, 15N, 2H, 18O). DIN EN 16718:2016-02 EN 16718:2015 (E) 7 1 Scope This European Standard describes a method for determining total organic carbon by calculating the differenc
40、e between the results of measurements of total carbon (TC) and total inorganic carbon (TIC). The identification of the bio-based content given by the stable isotopes such as 13C is described also. This method is applicable to all wood species, wood-based materials (panels, plywood, wood-polymer, etc
41、.) and woods containing chemicals in general. 2 Normative references The 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 o
42、f the referenced document (including any amendments) applies. EN 13183-1, Moisture content of a piece of sawn timber Part 1: Determination by oven dry method 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 total carbon TC amount of carbon fou
43、nd in waste, in organic, inorganic and elemental-state forms 3.2 total inorganic carbon TIC amount of carbon released as carbon dioxide through acidification 3.3 total organic carbon TOC carbon that is transformed into carbon dioxide through combustion and not released through acidification as carbo
44、n dioxide Note 1 to entry: The definitions given above are only applicable in this document and only partly overlap the scientific definitions of TC, TOC and TIC. 4 Principle In this procedure, TOC is obtained by subtraction between the measurement results of TC and TIC. The total carbon (TC) presen
45、t in the undried sample is transformed into carbon dioxide through combustion in a flow of gas that contains oxygen and is free of carbon dioxide. To ensure combustion is total, catalysers and/or modifiers can be used. The amount of carbon dioxide released is measured using infrared spectrometry, gr
46、avimetry, coulometry, conductometry, thermal conductivity detection or flame ionization detection after reduction to methane, or any other appropriate technique. The TIC is determined separately using another sub-sample, through acidification and purging of the released carbon dioxide, which is then
47、 measured using one of the techniques mentioned above. The 13C identification by IRMS is described in 7.7. This protocol is able also to work on other isotopes: 15N, 2H and 18O, which could be useful for complex materials containing wood. DIN EN 16718:2016-02 EN 16718:2015 (E) 8 5 Reagents and produ
48、cts All the reagents used shall be of analytical grade at least and suitable for their specific uses. Hygroscopic products shall be kept in a dessicator. 5.1 Glucose, C6H12O6. 5.2 Anhydrous sodium carbonate, Na2CO3. 5.3 Non-oxidizing mineral acid used to release the carbon dioxide, e.g. phosphoric a
49、cid H3PO4, (m = 85 %). 5.4 Synthetic air, nitrogen, oxygen, argon, free of carbon dioxide and organic impurities, according to the instructions supplied by the machine manufacturer. 6 Apparatus 6.1 Homogenization device, such as mixers, stirrers. 6.2 Analytical balance accurate to at least 0,5 % of test portion weight. 6.3 Apparatus for dosing carbon in solid matter, along with its accessories. 6.4 Purging device for dosing TIC. 6.5 Mixer mill. 7 Procedure 7.1 Preparation of the sample Before the sample preparation, the sampling program shall be prope
