Supercritical carbon dioxide extraction

Supercritical carbon dioxide extraction

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Credit: JAMES KING-HOLMES/SCIENCE PHOTO LIBRARY

Caption: MODEL RELEASED. Researcher in archeological chemistry experiments with the use of supercritical carbon dioxide as an extraction agent to remove contamination from samples to be dated by the Oxford Radiocarbon Accelerator Unit, University of Oxford, UK as any impurities may affect the results. The cylinder in the foreground provides carbon dioxide to the laboratory equipment to the scientist's right, where temperature and pressure is controlled to provide a supercritical fluid having properties midway between a gas and a liquid. Photographed at the Oxford Radiocarbon Accelerator Unit, University of Oxford, UK.

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Keywords: analysis, archaeology, archeology, bone, carbon dioxide, chemistry, co2, collagen, dating, extractant, extraction, fluid, gas, organic, oxford, pressure, purification, radiocarbon, radiocarbon dating, research, sample, sampling, solvent, super-critical, supercritical, supercritical fluid, temperature

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