Deep-eutectic-solvent based supported liquid membrane as well as preparation method and application thereof
A deep eutectic solvent, supporting liquid membrane technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., to achieve the effect of high extraction efficiency, simple process and high stability
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Embodiment 1
[0043] 0.10mmol / L tryptophan aqueous solution (pH = 1 adjusted with concentrated hydrochloric acid) was used as the donor phase, and the acceptor phase was 0.10mol / L NaOH solution (pH = 13). The stirring extraction time was 200min and the stirring speed was 400rpm. Deep eutectic solvent (choline chloride and p-toluenesulfonic acid in a molar ratio of 1:2) supports hydrophilic mixed cellulose liquid membrane to extract tryptophan, and the effective membrane area is 5cm 2 , using a UV spectrophotometer to detect the concentration change of tryptophan before and after extraction of the donor phase and the acceptor phase at a wavelength of 278nm, the concentration of tryptophan in the donor phase is 0.014mmol / L, and the calculated extraction rate is 86.1%.
Embodiment 2
[0045] A 0.40mmol / L tryptophan aqueous solution (pH=1 adjusted with concentrated hydrochloric acid) was used as the donor phase, and a 0.10mol / L NaOH solution (pH=13) was used as the acceptor phase. The stirring extraction time is 200min, and the stirring speed is 400rpm. Deep eutectic solvent (choline chloride and p-toluenesulfonic acid in a molar ratio of 1:2) supports hydrophilic mixed cellulose liquid membrane to extract tryptophan, and the effective membrane area is 5cm 2 , with a UV spectrophotometer at a wavelength of 278nm to detect the concentration of tryptophan in the donor phase and the acceptor phase before and after extraction, the concentration of tryptophan in the donor phase is 0.203mmol / L, and the calculated extraction rate is 49.3%.
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