ASTM Method D6866 is the US government approved method for determining the renewable/biobased content of natural range materials, including ethanol additives, bio-diesel additives and biobased products.
Borrowing on the principles of radiocarbon dating, D6866 is able to determine the renewable carbon content of almost any type of material, whether it is in solid, liquid or gas form. The method provides a percentage determination of fossil carbon content versus renewable biomass carbon content of a product or fuel blend.
The ASTM D6866 method is used extensively to certify the biobased content of bioplastics. There is an important difference between biodegradability and biobased content. A bioplastic such as high density polyethylene (HDPE) developed by Braskem can be 100% biobased (i.e .contain 100% renewable carbon), yet be non-biodegradable. These bioplastics such HDPE play nonetheless an important role in greenhouse gas abatement, particularly when they are combusted for energy production. The biobased component of these bioplastics is considered carbon-neutral since their origin is from biomass.
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