title: Recovery and purification of nicotine from waste tobacco by aqueous two-phase system/reverse extraction.
abstract: A two-step process has been developed for the purification of nicotine from waste tobacco using an aqueous two-phase system and solvent reverse extraction. The partitioning behavior of nicotine was investigated in an isopropyl alcohol/(NH4)2SO4 aqueous two-phase system. The effects of the addition of salt, pH and temperature on the partitioning behavior of nicotine were studied. The recovery rate of nicotine was 96.1% with a purity of above 99% when optimal conditions were used [(NH4)2SO4 25%, pH 9, temperature 35 degrees C, isopropyl alcohol 5 mL].
authors.affiliation: School of Chemistry and Chemical Engineering, Central South University, Changsha, China.
authors.forename: Jian-min
authors.initials: JM
authors.lastname: Xing
authors.forename: Fen-fang
authors.initials: FF
authors.lastname: Li
authors.forename: Jing
authors.initials: J
authors.lastname: Ping
mesh_terms: D019840:2-Propanol; D000645:Ammonium Sulfate; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D009538:Nicotine / Q000302:isolation & purification*; D014026:Nicotiana / Q000737:chemistry*; D014866:Waste Products / Q000032:analysis
chemical_list: D014866:Waste Products; D009538:Nicotine; D019840:2-Propanol; D000645:Ammonium Sulfate