This implies selecting a suitable extractant with low water solubility, which is sufficiently retained inside the pores, and selecting mechanically stable particles as a solid support for the extractant.
22.
To run an elutriate test a soil sample is mixed with an extractant for a period of time, then allowed to settle and a sample is taken from the extract.
23.
The idea behind TAPPIR is to use the advantages posed by SIRs, namely low extractant loss due to immobilization in the pores and less emulsification than in liquid-liquid extraction.
24.
Furthermore, the solute S can react with the extractant to form a complex ES . This complexation of the solute with the extractant shifts the overall extraction equilibrium further towards the organic phase.
25.
Furthermore, the solute S can react with the extractant to form a complex ES . This complexation of the solute with the extractant shifts the overall extraction equilibrium further towards the organic phase.
26.
They are commonly used in dry cleaning, as degreasing agents in the metal processing industry, as solvent and extractant in the chemical and textile industry, and in the production of dyes and rubber.
27.
When the separation of two closely related compounds by liquid liquid extraction is necessary, conventional wisdom indicates that a selective extractant must be found that will discern between the two by associating each to different equilibrium compositions.
28.
However, if the vapor pressure of the extracted solute is too low, or if the complexation between solute and extractant is too strong, other techniques need to be applied, e . g . pH swing.
29.
It can be used as a solvent ( in the purely chemical sense rather than the solvent extraction sense ) to dissolve an extractant which is a solid and so render it suitable for use in a liquid liquid extraction process.
30.
Finally, by filling the whole volume of the particle pores with an extractant ( complexing agent ), a higher capacity for solutes can be achieved than with ordinary adsorption or ion exchange resins, where only the surface area is available.
