Isotopic Abundance
Chemical measurement expressing the relative abundance of stable isotopes, specifically carbon 13 to carbon 12, within a material sample. Laboratory testing for carbon isotope ratio allows for the identification of fossil-derived synthetics in bio-based coatings. This analysis compares the sample against a standard reference to determine the fraction of modern carbon present.
The result establishes the biogenic content of a substrate.
Isotopic Signature
Mass spectrometry provides the necessary data to calculate the delta value in parts per thousand relative to a standard. A carbon isotope ratio fluctuates based on the specific metabolic pathway of the plant source. These variations allow for the verification of renewable content claims in multi-layer board constructions.
Such testing proves origin.
Provenance Verification
Auditing procedures use this metric to verify compliance with specific environmental labeling requirements or tax exemptions. Because synthetic additives derived from oil contain no modern carbon 14 and maintain distinct stable carbon isotope ratio profiles, any unauthorized adulteration of bio-polymers becomes detectable through laboratory analysis. These results guide the final classification of the substrate as bio-based or hybrid material.
Verification relies on high precision to distinguish between different grades of renewable content in complex packaging structures. Such documentation is required for international trade. Precision ensures validity.
