What are the advantages of Soxhlet extraction and general soaking extraction?
Soxhlet extraction is a method for extracting compounds from solid materials. The extraction principle is as follows: the sample to be tested is wrapped in a degreased filter paper bag, placed in an extraction tube, an organic solvent is added to the extraction bottle, the extraction bottle is heated, and the solvent is vaporized. The condenser rises into the condenser, and the liquid is dripped into the extraction tube to extract the organic matter in the sample. The liquid level of the solvent in the extraction tube reaches a certain height, and the solvent in which the organic substance is dissolved flows into the extraction bottle through the siphon. The solvent flowing into the extraction bottle is continuously heated, vaporized, raised, condensed, and dropped into the extraction tube, so that the extraction is repeated several times until the extraction is completed.
The general soaking extraction is to infiltrate the solid for a long time with a solvent to leach the desired substance, and to pour out the soaking liquid, which completes one extraction. If the extraction is repeated, the operation is repeated, and the amount of solvent used is large, time-consuming and inefficient. .
The advantage of Soxhlet extraction is that it can be extracted multiple times. Compared with the general soaking method, it has the advantages of small solvent dosage, high efficiency and complete extraction.