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A new method to extract and separate tetracycline(TC) in a new aqueous two-phase system(ATPS) consisting of hydrophilic [Bmim]BF4 and NaH2PO4 was investigated. The effects of the amount of salt, ionic liquid as well as tetracycline on extraction efficiency were studied systematically. The results show that ionic liquid-ATPS exhibited the highest extraction efficiency higher than 90%. When the concentration of NaH2PO4 was 33.3%―38.5% (mass fraction), the amounts of ionic liquid and TC were 1.0―2.0 mL and 1.8 mL, respectively, and ionic liquid could be re-used.
A new method to extract and separate tetracycline (TC) in a new aqueous two-phase system (ATPS) consisting of hydrophilic [Bmim] BF4 and NaH2PO4 was investigated. The effects of the amount of salt, ionic liquid as well as tetracycline on extraction The results show that ionic liquid-ATPS exhibited the highest extraction efficiency higher than 90%. When the concentration of NaH2PO4 was 33.3% -38.5% by mass fraction, the amounts of ionic liquid and TC were 1.0-2.0 mL and 1.8 mL, respectively, and ionic liquid could be re-used.