A rotary evaporator is a laboratory instrument used for efficient and gentle removal of solvents from liquid samples through evaporation and condensation. It comprises a flask for the liquid mixture, a rotating heating bath to apply heat, and a rotating flask with a vacuum system for rapid and controlled evaporation. The system operates under reduced pressure, which lowers the boiling point of the solvent, allowing for its removal at lower temperatures to prevent sample degradation. Rotary evaporators are vital in various scientific disciplines, including chemistry and biology, for tasks such as concentrating solutions, purifying substances, and solvent recovery. They play a crucial role in sample preparation and analysis by producing highly concentrated and pure samples, essential for research, testing, and production processes in industries like pharmaceuticals, food, and environmental analysis.