Supercritical carbon dioxide extraction

Supercritical carbon dioxide extraction

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Credit: JAMES KING-HOLMES/SCIENCE PHOTO LIBRARY

Caption: Identical samples of collagen, originating from bone submitted for radiocarbon dating, before and after extraction treatment with supercritical carbon dioxide showing the changes in mass and structure which has occurred with many of the superfluous components, such as fats, being removed. Photographed at the Oxford Radiocarbon Accelerator Unit, University of Oxford, UK.

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Keywords: age, archaeology, archeology, bone, carbon, carbon dioxide, carbon-14, chemistry, co2, collagen, critical pressure, critical temperature, dating, extractant, extraction, glass bead, isotope, oxford, purification, radiocarbon, solvent, super-critical, supercritical, supercritical fluid

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