https://doi.org/10.1351/goldbook.10227
Leaching performed at elevated temperature and pressure.
Notes:
- A typical apparatus is shown in the figure below.
- The sample, in the form of a fine powder or liquid supported on an inert solid, is packed into an extraction vessel and inserted in a flow-through system. The temperature, pressure, solvent type, and static and/or dynamic extraction time are varied to optimize the extraction performance.

Schematic diagram of a typical apparatus for pressurized-liquid extraction. Gas flow is used to displace the extraction solvent from the sample chamber.