scope:

NEN-EN 16640 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.