Liquid–liquid equilibria of an aqueous two-phase system containing polyethylene glycol and sodium citrate: experiment and correlation

Zafarani-Moattar, Mohammed Taghi; Sadeghi, Rahmat; Hamidi, A. A.

doi:10.1016/j.fluid.2004.01.028

Cited by 117 publications

(110 citation statements)

References 23 publications

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“…The comprehensive efficiency of the physical properties including density, viscosity, and interface tension can be represented by Morton number ( 0 ) [29][30][31]. Hence, a generalized correlation equation given by Mistry and Golob [4,27] was developed for the ATPS with different PEG molar masses and salt relating the Morton number ( 0 ), the ratio of interfacial tension to surface tension, , and TLL:…”

Section: Interfacial Tension Measurementsmentioning

confidence: 99%

Phase Separation Behavior and System Properties of Aqueous Two-Phase Systems with Polyethylene Glycol and Different Salts: Experiment and Correlation

et al. 2015

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The phase separation behaviors of PEG1000/sodium citrate, PEG4000/sodium citrate, PEG1000/ammonium sulfate, and PEG4000/ammonium sulfate aqueous two-phase systems were investigated, respectively. There are two distinct situations for the phase separation rate in the investigated aqueous two-phase systems: one state is top-continuous phase with slow phase separation rate and strong bottom-continuous phase with fast phase separation rate and weak volume ratio dependence. The system properties such as density, viscosity, and interfacial tension between top and bottom phases which have effects on the phase separation rate of aqueous two-phase systems were measured. The property parameter differences between the two phases increased with increasing tie line length and then improved the phase separation rate. Moreover, a modified correlation equation including the phase separation rate, tie line length, and physical properties of the four aqueous two-phase systems has been proposed and successfully tested in the bottom-continuous phase, whose coefficients were estimated through regression analysis. The predicted results of PEG1000/sodium citrate aqueous two-phase systems were verified through the stationary phase retention in the cross-axis countercurrent chromatography.

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Section: Interfacial Tension Measurementsmentioning

confidence: 99%

Phase Separation Behavior and System Properties of Aqueous Two-Phase Systems with Polyethylene Glycol and Different Salts: Experiment and Correlation

et al. 2015

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“…The osmotic virial equation has been shown by many researchers over decades to apply to a vast number of types of solutes in aqueous systems, including sugars, electrolytes, cryoprotectants, macromolecules, proteins, alcohols, and starches. 3,24,26,27,[31][32][33][34][35][36][37][38][39][40][41][42][43][44] Osmolality describes the concentration dependence of the chemical potential of water in a solution and is the solution thermodynamics quantity that appears directly in equations describing freezing point depression of a solution (see Eq. 12) or the driving force for passive osmotic transport.…”

Section: Introductionmentioning

confidence: 99%

Non-ideal Solution Thermodynamics of Cytoplasm

Ross-Rodriguez

Elliott

McGann

2012

Biopreservation and Biobanking

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Quantitative description of the non-ideal solution thermodynamics of the cytoplasm of a living mammalian cell is critically necessary in mathematical modeling of cryobiology and desiccation and other fields where the passive osmotic response of a cell plays a role. In the solution thermodynamics osmotic virial equation, the quadratic correction to the linear ideal, dilute solution theory is described by the second osmotic virial coefficient. Herein we report, for the first time, intracellular solution second osmotic virial coefficients for four cell types [TF-1 hematopoietic stem cells, human umbilical vein endothelial cells (HUVEC), porcine hepatocytes, and porcine chondrocytes] and further report second osmotic virial coefficients indistinguishable from zero (for the concentration range studied) for human hepatocytes and mouse oocytes.

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“…Polymer + salt ATPS are particularly useful, since they present relatively low cost and low viscosity, which provide an efficient phase separation [11][12][13][14][15][16] . Equilibrium data for aqueous systems formed by PEG + sodium citrate and particularly for those composed of PEG + potassium phosphate are quite available [17][18][19][20][21][22][23][24][25][26][27][28] . However, there is nowadays a considerable demand for comprehensive studies with reference to the effect of operational conditions on the behavior of ATPS 29 .…”

Section: Introductionmentioning

confidence: 99%

Influence of the temperature and type of salt on the phase equilibrium of peg 1500 + potassium phosphate and peg 1500 + sodium citrate aqueous two-phase systems

Carvalho¹,

Coimbra²,

Costa³

et al. 2008

Quím. Nova

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Recebido em 6/10/06; aceito em 24/8/07; publicado na web em 19/12/07The present work analyzed the effect of the temperature and type of salt on the phase equilibrium of aqueous two-phase systems (ATPS) formed by poly (ethylene glycol) (PEG) 1500 + potassium phosphate, from (278.15 to 318.15) K, and PEG 1500 + sodium citrate, from (278.15 to 298.15) K. The rise of the temperature normally increased the slope of the tie line (STL). With respect to the influence of the type of salt, sodium citrate showed better capability to induce phase separation, when compared to potassium phosphate.

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Liquid–liquid equilibria of an aqueous two-phase system containing polyethylene glycol and sodium citrate: experiment and correlation

Cited by 117 publications

References 23 publications

Phase Separation Behavior and System Properties of Aqueous Two-Phase Systems with Polyethylene Glycol and Different Salts: Experiment and Correlation

Phase Separation Behavior and System Properties of Aqueous Two-Phase Systems with Polyethylene Glycol and Different Salts: Experiment and Correlation

Non-ideal Solution Thermodynamics of Cytoplasm

Influence of the temperature and type of salt on the phase equilibrium of peg 1500 + potassium phosphate and peg 1500 + sodium citrate aqueous two-phase systems

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