Phase equilibrium of aqueous two-phase systems composed by L35 triblock copolymer + organic and inorganic ammonium electrolytes + water at 298.2 and 313.2 K

Liquid–Liquid Equilibrium Data of Macromolecule + Ammonium Thiosulfate + Water Ternary Systems at 283.2, 298.2, and 313.2 K

“…TLs are straight lines connecting the points in the phase diagram that represent a particular MRP, ERP, and global composition of the ATPS. The TLL is an important parameter that numerically describes the difference in the intensive thermodynamic properties of the two ATPS phases, under constant conditions of temperature and pressure, 23 calculated as follows: The experimental data (Tables 2−345) showed that the TLL value increased as the global composition of the ATPS increased. This behavior is well known and has been reported previously for other ATPS.…”

“…This behavior is well known and has been reported previously for other ATPS. 23 The separation of the phases of the ATPS was characterized by a higher concentration of the macromolecule in one phase and (NH 4 ) 2 S 2 O 3 in the other phase. This is typical of an ATPS composed of a macromolecule and an electrolyte, indicating that macromolecule−electrolyte interactions are less favorable than macromolecule−macromolecule and electrolyte−electrolyte interactions.…”

“…15,16 The acquisition of liquid−liquid equilibrium data for new green ATPS with greater hydrophobicity, investigating the effect of the hydrophobic/hydrophilic balance of the macromolecule on the formation of the systems, can assist in elucidating the mechanisms that lead to their formation to expand the potential applications in the field of separation/purification. Different electrolytes have been used in the literature to obtain ATPS composed of macromolecules, such as sulfates, 17−21 phosphates, 22,23 citrates, 24,25 thiocyanates, 26 and tartrates. 23,25,27,28 However, as far as we know, liquid−liquid equilibrium data made up of ammonium thiosulfate are not related in the literature.…”

“…Different electrolytes have been used in the literature to obtain ATPS composed of macromolecules, such as sulfates, 17−21 phosphates, 22,23 citrates, 24,25 thiocyanates, 26 and tartrates. 23,25,27,28 However, as far as we know, liquid−liquid equilibrium data made up of ammonium thiosulfate are not related in the literature. Two studies reporting the use of sodium thiosulfate to obtain ATPS with PEO with a molar mass of 1500, 4000, or 6000 g mol −1 .…”

“…The acquisition of liquid–liquid equilibrium data for new green ATPS with greater hydrophobicity, investigating the effect of the hydrophobic/hydrophilic balance of the macromolecule on the formation of the systems, can assist in elucidating the mechanisms that lead to their formation to expand the potential applications in the field of separation/purification. Different electrolytes have been used in the literature to obtain ATPS composed of macromolecules, such as sulfates, − phosphates, , citrates, , thiocyanates, and tartrates. ,,, However, as far as we know, liquid–liquid equilibrium data made up of ammonium thiosulfate are not related in the literature. Two studies reporting the use of sodium thiosulfate to obtain ATPS with PEO with a molar mass of 1500, 4000, or 6000 g mol –1 . , The use of ammonium thiosulfate ((NH 4 ) 2 S 2 O 3 ) as the electrolyte is an excellent strategy for the separation of analytes, mainly metal ions, because, compared to many other salts, it is inexpensive and nontoxic and has reducing and complexing characteristics.…”