CEN/TS 16640:2014

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviations
5 Principle
6 Determination of the [14]C content
7 Calculation of the bio-based carbon content
8 Test report
Annex A (informative) - Procedures for sampling
        of products
Annex B (normative) - Procedure for the conversion of
        the carbon present in the sample to a
        suitable sample for [14]C determination
Annex C (normative) - Method A - Liquid scintillation-counter
        method (LSC)
Annex D (normative) - Method B - Beta-ionization (BI)
Annex E (normative) - Method C - Accelerator Mass
        Spectrometry (AMS)
Annex F (informative) - Definitions and formulae of the
        [14]C based method
Bibliography

This Technical Specification specifies a method for the determination of the bio-based carbon content in products, based on the 14C content measurement.It also specifies three 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: Beta-ionization (BI);-Method C: Accelerator mass spectrometry (AMS).The bio-based carbon content is expressed by a fraction of sample mass, as a fraction of the total carbon content or as a fraction of the total organic carbon content.This calculation method is applicable to any product containing organic carbon, including biocomposites.NOTEThis Technical Specification does not provide the methodology for the calculation of the biomass content of a sample.