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in the atmosphere at the time of cessation of respiration or metabolism, such as the harvesting of a crop or grass living its natural life in a field.Special considerations are needed to apply the testing method to materials originating from within artificial environments.
Feeding ancient cities in South Asia: dating the adoption of rice, millet and tropical pulses in the Indus civilisation.
These materials are available for distribution in North America from the National Institute of Standards and Technology (NIST), and outside North America from the International Atomic Energy Agency (IAEA), Vienna, Austria.
This standard is a test method that teaches how to experimentally measure biobased carbon content of solids, liquids, and gaseous samples using radiocarbon analysis.
This error is exclusive of indeterminate sources of error in the origin of the biobased content (see Section 22 on precision and bias).
Method C uses LSC techniques to quantify the biobased content of a product using sample carbon that has been converted to benzene.