Measure fluid saturation of a core sample using the US Bureau of Mines method (Soxhlet Extraction)

The Soxhlet extraction apparatus is the most common method for cleaning sample, and is routinely used by most laboratories. As shown in Figure 1, toluene is brought to a slow boil in a Pyrex flask; its vapors move upwards and the core becomes engulfed in the toluene vapors (at approximately 120 C°). Eventual water within the core sample in the thimble will be vaporized.