Supercritical fluid extraction

Supercritical Fluid Extraction (SFE) is a technique used to extract compounds from solid or liquid materials using supercritical fluids, most commonly carbon dioxide. A supercritical fluid is a substance that is held at a temperature and pressure above its critical point, where distinct liquid and gas phases do not exist. In this state, the fluid possesses unique properties of both gases and liquids, allowing it to diffuse through solids like a gas while maintaining a high density like a liquid.