It's used in the laboratory liquid-liquid extractions to separate (partition) the components of a mixture into two immiscible solvent phases of different densities
Extraction Thimbles 113mm x 55mm
Extraction thimbles are often used for holding solid materials, from which certain substances are to be eluted (extracted) with a suitable solvent.
Additionally, extraction thimbles are used in the fields of air and waste gas analysis for collecting solid particles (dust).