What do u mean by solvent extraction?
(Pharmaceutical: Processes) Solvent extraction is the separation of a particular substance from a mixture by dissolving that substance in a solvent that will dissolve it, but which will not dissolve any other substance in the mixture.
What is Soxhlet extraction procedure?
Soxhlet extraction is an exhaustive extraction technique widely applied to analytes that are sufficiently thermally stable. The extraction solvent is continuously cycled though the matrix, by boiling and condensation, with the sample being collected in the hot solvent.
What is maceration extraction?
(i) Maceration. This is an extraction procedure in which coarsely powdered drug material, either leaves or stem bark or root bark, is placed inside a container; the menstruum is poured on top until completely covered the drug material. The container is then closed and kept for at least three days.
What is percolation extraction?
Percolation extraction is a conventional extraction method used in the processing of traditional Chinese medicines. After medicinal material powder is placed in a percolation tank, the extraction solvent is continuously added, and percolation extract is collected simultaneously. The percolation equipment is simple.
What is solvent extraction 11th class?
Solvent extraction is a method used to separate an organic compound present in an aqueous solution, by shaking it with a suitable organic solvent in which the compound is more soluble than water. Concept: Solvent Extraction.
What happens during Soxhlet extraction?
The Soxhlet extraction process heats the solvent (ethanol) to boiling temperature (>78°C). The evaporated ethanol is contained within the apparatus by the condenser unit; however the apparatus should be placed under a fume hood in case of escape.
What is the main purpose of using Soxhlet extraction?
Typically, Soxhlet extraction is used when the desired compound has a limited solubility in a solvent, and the impurity is insoluble in that solvent. It allows for unmonitored and unmanaged operation while efficiently recycling a small amount of solvent to dissolve a larger amount of material.
What is maceration give example?
Maceration is, generally, to soften by soaking in a liquid. In biology, maceration is used to describe multiple actions. One definition of maceration is the breakdown of food into chyme during digestion. Skin maceration, or pruning, is the softening and breaking down of skin from being exposed to too much moisture.
What is called percolation?
Percolate comes from a Latin verb meaning “to put through a sieve”. Something that percolates filters through something else, just as small particles pass through a sieve. Water is drawn downward through the soil, and this percolation usually cleans the water.
What is expression extraction?
Expression is also known as the “expeller-pressed” or “cold-pressed” method of extraction since no heat is needed to extract the essential oil. It is mostly used to extract citrus essential oils. In this process, the peels are pricked in order to puncture the cells containing the oils.
What is the meaning of successively?
Define successively. successively synonyms, successively pronunciation, successively translation, English dictionary definition of successively. adj. 1. Following in uninterrupted order; consecutive: on three successive days. 2. Of, characterized by, or involving succession: the government successive…
What is the meaning of successive government?
Also found in: Thesaurus . 1. Following in uninterrupted order; consecutive: on three successive days. 2. Of, characterized by, or involving succession: the government successive to the fallen monarchy. suc·ces′sive·ness n. American Heritage® Dictionary of the English Language, Fifth Edition.
What is serial exhaustive extraction?
Serial exhaustive extraction: It is another common method of extraction which involves successive extraction with solvents of increasing polarity from a non-polar (hexane) to a more polar solvent (methanol) to ensure that
What are extraction methods used in Pharma?
Extraction methods used pharmaceutically involves the separation of medicinally active portions of plant tissues from the inactive/inert components by using selective solvents. During extraction, solvents diffuse into the solid plant material and solubilise compounds with similar polarity.