Evaporation, in a technical sense, denotes the conversion of a liquid into a vapor for the purpose of separating it from another liquid of higher boiling point, or from a solid which is dissolved in it. In the great majority of cases, the liquid evaporated is water. If the liquid evaporated is to be recovered, the vapors are condensed, and the process then becomes one of Distillation.
Extraction in chemistry is a separation process consisting in the separation of a substance from a matrix. In the extraction process, a solute is transferred from one phase to another to separate it from unreacted starting materials or impurities. Extraction is also used to facilitate the isolation of a solute from a reaction solvent that is difficult to remove by evaporation, such as a solvent with a high boiling point. Generally, there are three types of extractions. First, in solid-liquid extraction, the solute is transferred from a solid phase to a liquid phase. In liquid-liquid extraction, a solute is transferred from one liquid to another. In acid-base extraction, a solute is transformed into an ionic compound and transferred from an organic phase to an aqueous phase.
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The process of decreasing the volume of a solvent by distributing it like a thin film across the interior of a vessel at elevated levels of temperature and decreased pressure is known as Rotary Evaporation. This makes way for the rapid removal of excess solvents from samples that are less volatile. Most of...