Isotope Quantification
Accelerator mass spectrometry measures the exact ratio of radioactive carbon fourteen to stable carbon twelve isotopes to determine the exact bio based content of materials. Research and testing laboratories apply radiocarbon 14c testing to packaging substrates, bio polymers and barrier coatings to verify the proportion of contemporary biomass versus fossil derived raw materials. Modern atmospheric carbon dioxide contains a known baseline of carbon fourteen that living plants absorb during photosynthesis, whereas petrochemical feedstocks contain zero active carbon fourteen due to radioactive decay over millions of years.
Standard test protocols calculate the bio based carbon percentage based on standard reference activity. The method measures isotopic ratios strictly and does not determine material biodegradability or recyclability.
Spectrometric Method
Laboratory sample preparation requires combusting packaging specimens into pure carbon dioxide gas before catalytic reduction to solid elemental graphite. Conducting radiocarbon 14c testing involves ionizing the graphite target inside an accelerator mass spectrometer to separate carbon isotopes based on their mass to charge ratios. High energy electromagnetic fields accelerate the ions, allowing sensitive detectors to count individual carbon fourteen atoms relative to stable carbon isotopes.
Comparing the measured isotopic ratio against international modern carbon standards reveals the exact biogenic carbon fraction. The resulting percentage provides empirical proof of renewable material content.
Claim Substantiation
Brand owners verify marketing claims for plant based coatings and renewable barrier films using standardized isotope certificates. Packaging substrates verified by radiocarbon 14c testing establish legally defensible proof for environmental product declarations and bio based labelling schemes. Blended polymers containing bio polyethylene and virgin fossil plastics yield precise percentage disclosures through isotopic counting.
Sourcing teams rely on these test certificates to validate renewable feedstock declarations against fraudulent supplier claims. Empirical isotope measurement prevents greenwashing in sustainable packaging supply chains.
