Polyethylene glycol 8000+ citrate salts aqueous two-phase systems: Relative hydrophobicity of the equilibrium phases

- PEG8000-K3C6H5O7 ATPSs present the most negative ΔG*(CH2) values.
- ATPSs with K3C6H5O7 have larger relative hydrophobicity than ATPSs with Na3C6H5O7.
- PEG8000-K3C6H5O7 ATPSs have lower cross-contamination between the equilibrium phases.
- PEG phase has higher affinity to hydrophobic hydration interactions than salt phase.