Basic Principles Of Solvent Extraction With Examples
Further analysis after the extraction process can be done by various methods such as spectrophotometry, and so on. If the method of analysis used as a method of spectrophotometry, no need for release because of the concentration of the corresponding cluster can be specified directly in the organic layer. Spectrophotometry method can be used for water or organic solvents.
Solid-liquid extraction or leaching of the diffusion of dissolved components is the transfer of an inert solids into the solvent. This process is the process of physical because of dissolved components is then returned to its original state without undergoing chemical change. Extraction of solid materials can be made if desired materials are soluble in solvent. Sustainable extraction necessary when the solid is only slightly soluble in the solvent. But often also used on soluble solids because its effectiveness.
Factors that affect the rate of extraction is:
• Type of sample preparation
• extraction Time
• the quantity of solvent
• the temperature of the solvent
• solvent Type
Extraction more efficient when done repeatedly with the amount of solvent that is smaller than the sum of its solvent a lot but its extraction only once.
The basic principle of solvent extraction
The law States that the Gibb's phase:
P = C + V + 2
Description: P = phase
C = Component
V = Derjat freedom
In solvent extraction, we have P = 2, i.e. the water phase and organic, C = 1, i.e. the substance is dissolved in a solvent and phase of water at the temperature and tekanantetap, so V = 1, so we will be able to:
2 + 1 + 1 = 2, i.e. P + V = C + 2
According to the Nernst distribution Law:
If [X 1] are the concentrations of dissolved substances in phase 1 and [X 2] are the concentrations of dissolved substances in phase 2, then at equilibrium,
X 1, x 2 is obtained; KD =
Where is; KD = partition Coefficient. Partition coefficient or distribution does not depend on the concentrations of total dissolved substances on the second phase. In the equation above, we can write the koefesian activity in organic phase and water phase.
P = C + V + 2
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