ISO 16620-2:2019
Plastics — Biobased content — Part 2: Determination of biobased carbon content
This document specifies a calculation method for the determination of the biobased carbon content in monomers, polymers, and plastic materials and products, based on the 14C content measurement.
This document is applicable to plastic products and plastic materials (e.g. plasticisers or modifiers), polymer resins, monomers, or additives, which are made from biobased or fossil-based constituents.
Knowing the biobased content of plastic products is useful when evaluating their environmental impact.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions, symbols and abbreviated terms
3.1 Terms and definitions
3.2 Symbols
3.3 Abbreviated terms
4 Principle
5 Sampling
6 Determination of the 14C content
6.1 General
6.2 Principle
6.3 Procedure for the conversion of the carbon present in the sample to a suitable sample for 14C determination
6.4 Measurement techniques
7 Determination of the total carbon content and total organic carbon content
8 Calculation of the biobased carbon content
8.1 General
8.2 Correction factors
8.3 Calculation method
8.3.1 Calculation of the biobased carbon content by mass, xB
8.3.2 Calculation of the biobased carbon content, , as a fraction of TC
8.3.3 Calculation of the biobased carbon content, , as a fraction of TOC
8.3.4 Examples
9 Test report
Annex A (normative) Procedure for the conversion of the carbon present in the sample to a suitable sample for 14C determination
Annex B (normative) Method A — Determination by liquid scintillation-counter method (LSC)
Annex C (informative) Method B — 14C determination by beta-ionization
Annex D (normative) Method C — 14C determination by accelerator mass spectrometry
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions, symbols and abbreviated terms
3.1 Terms and definitions
3.2 Symbols
3.3 Abbreviated terms
4 Principle
5 Sampling
6 Determination of the 14C content
6.1 General
6.2 Principle
6.3 Procedure for the conversion of the carbon present in the sample to a suitable sample for 14C determination
6.4 Measurement techniques
7 Determination of the total carbon content and total organic carbon content
8 Calculation of the biobased carbon content
8.1 General
8.2 Correction factors
8.3 Calculation method
8.3.1 Calculation of the biobased carbon content by mass, xB
8.3.2 Calculation of the biobased carbon content, , as a fraction of TC
8.3.3 Calculation of the biobased carbon content, , as a fraction of TOC
8.3.4 Examples
9 Test report
Annex A (normative) Procedure for the conversion of the carbon present in the sample to a suitable sample for 14C determination
Annex B (normative) Method A — Determination by liquid scintillation-counter method (LSC)
Annex C (informative) Method B — 14C determination by beta-ionization
Annex D (normative) Method C — 14C determination by accelerator mass spectrometry
Bibliography