Resumen de Rediscovery of an Extraction Technique
The technique consists of putting a few milliliters of the aqueous sample in a mortar and adding enough anhydrous sodium sulfate to react with all of the water. The thick paste is then ground up several times with a pestle and the appropriate solvent. The liquid water phase has been remove by formation of the hydrated salt; this results in rapid and quantitative extraction. The Soxhlet apparatus may be used instead if heat and time are of no concern.
