Partitioning of some amino acids and low molecular peptides in aqueous two-phase systems of poly(ethylene glycol) and dipotassium hydrogen phosphate

摘要: Abstract Aqueous two-phase systems are discussed for the extraction of biomolecules like, example, amino acids, peptides and enzymes from aqueous phase. The development such processes requires experimental results partitioning model substances, as well methods correlating predicting phase equilibria. present contribution reports small amounts (about 1 mg/g) acids glycine, l -glutamic acid, -phenylalanine -lysine some their low molecular in system dipotassium hydrogen phosphate poly(ethylene glycol) mass about 6000 35 000 at 293 K. used to determine interaction parameters a group excess Gibbs energy. remaining data test PEG/K2HPO4 systems.