Quentin Cooper talks to Dr Ray Marriott and Professor Martyn Poliakoff about supercritical fluids - fluids with the properties of both liquid and gas, which can be used to purify a variety of substances, from food to pharmaceuticals. As the chemical industry strives for greener credentials, supercritical fluids are emerging as a separations technology that is efficient, widely applicable, and less damaging to the environment than conventional solvents. Producer John Watkins. E-MAIL: scirad@bbc.ac.uk
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