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BS EN 16640:2017:2018 Edition

BS EN 16640:2017:2018 Edition

$167.15

Bio-based products. Bio-based carbon content. Determination of the bio-based carbon content using the radiocarbon method

Published By Publication Date Number of Pages
BSI 2018 38
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This European Standard specifies a method for the determination of the bio-based carbon content in products, based on the 14C content measurement.

This European Standard also specifies two test methods to be used for the determination of the 14C content from which the bio-based carbon content is calculated:

  • Method A: Liquid scintillation-counter method (LSC);

  • Method B: Accelerator mass spectrometry (AMS).

A third method, Method C: Beta ionization (BI) can also be used for the determination of the 14C content and is described in Annex D (informative)

The bio-based carbon content is expressed by a fraction of sample mass or as a fraction of the total carbon content. This calculation method is applicable to any product containing carbon, including bio composites.

NOTE This European Standard does not provide the methodology for the calculation of the biomass content of a sample see prEN 16785–1 [5] and prEN 16785–2 [6].

PDF Catalog

PDF Pages PDF Title
2 undefined
8 1 Scope
2 Normative references
3 Terms and definitions
9 4 Symbols and abbreviations
10 5 Principle
11 6 Determination of the 14C content
6.1 General
6.2 Principle
6.3 Sampling
6.4 Procedure for the conversion of the carbon present in the sample to a suitable sample for 14C determination
6.5 Measurements
12 7 Calculation of the bio-based carbon content
7.1 General
7.2 Reference value for 100 % bio-based carbon
13 7.3 Calculation method
7.3.1 Calculation of the bio-based carbon content by dry mass xB
7.3.1.1 14C content determined by Method A (LSC) or Method C (BI)
7.3.1.2 14C content determined by Method B (AMS)
14 7.3.2 Calculation of the bio-based carbon content xTCB as a fraction of TC
7.3.3 Examples
15 7.3.4 Examples of calculations xTCB
8 Performance characteristics
9 Test report
17 Annex A (informative)Procedures for sampling of products
A.1 General
18 Annex B (normative)Procedure for the conversion of the carbon present in the sample to a suitable sample for 14C determination
B.1 General
B.2 Sample preparation
B.3 Preparation for 14C measurement
B.3.1 General
19 B.3.2 Reagents and materials
B.4 Combustion of the sample
B.4.1 Combustion of the sample in a calorimetric bomb
20 B.4.2 Combustion of the sample in a tube furnace or a combustion apparatus
21 B.4.3 Direct LSC measurement on the product
B.5 Standardization of LSC and BI measurement results
22 B.6 Standardization of AMS measurement results
B.7 Symbols and abbreviations
23 Annex C (normative)Method A – Liquid scintillation-counter method (LSC)
C.1 General
C.2 Principle
C.3 Reagents and materials
C.4 Apparatus
24 C.5 Procedure
C.5.1 General
C.5.2 Benzene conversion
C.5.3 Direct absorption of the CO2 in a carbamate solution
C.5.4 Measurement
25 C.5.5 Blank correction
C.6 Calculation of the results
26 Annex D (informative)Method C – Beta-ionization (BI)
D.1 General
D.2 Principle
D.3 Reagents and materials
27 D.4 Apparatus
D.5 ˜Procedure™
28 D.6 ˜ Calculation of the results™
29 Annex E (normative)Method B – Accelerator Mass Spectrometry (AMS)
E.1 General
E.2 ˜Principle™
E.3 ˜Reagents and materials™
E.4 ˜Apparatus™
30 E.5 ˜Procedure™
31 E.6 ˜Calculation of the results™
32 Annex F (informative)Performance characteristics

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BS EN 16640:2017
$167.15