Effect of pH on Properties of Poly(Vinyl Pyrrolidone) + Tri-Sodium Citrate + Guanidine Hydrochloride Aqueous Two-Phase Systems

References

• Alam, M. S., Kumar, S., and Naqvi, A. Z. (2006). Study of the cloud point of an amphiphilic antidepressant drug: Influence of surfactants, polymers and non-electrolytes, Colloids Surf. A, 287, 197–202.
   Web of Science ®Google Scholar
• Alam, M. S., and Naqvi, A. Z. (2007). Tuning of cloud point of promethazine hydrochloride with surfactants and polymers, J. Surf. Detergents, 10, 35–40.
   Web of Science ®Google Scholar
• Alam, M. S., Naqvi, A. Z., and Kabir-ud-Din. (2008). Study of the cloud point of the phenothiazine drug chlorpromazine hydrochloride: Effect of surfactants and polymers, J. Dispersion Sci. Technol., 29, 274–279.
   Web of Science ®Google Scholar
• Alam, M. S., and Mndal, A. B. (2010a). Thermodynamics at the cloud point of phenothiazine drug chlorpromazine hydrochloride—additive systems, J. Chem. Eng. Data, 55, 1693–1699.
   Web of Science ®Google Scholar
• Alam, M. S., and Mndal, A. B. (2010b). Amphiphilic drug promethazine hydrochloride—additive systems: evaluation of thermodynamic parameters at cloud point, J. Chem. Eng. Data, 55, 1893–1896.
   Web of Science ®Google Scholar
• Alam, M. S., Kabir-ud-Din., and Mandal, A. B. (2010c). Thermodynamics of the amphiphilic drug, amitriptyline hydrochloride-surfactant/polymer systems at the cloud point, J. Dispersion Sci. Technol., 31, 1721–1726.
   Web of Science ®Google Scholar
• Albartson, P. A. (1986). Partition of Cell Particles and Macromolecules, Willy, New York.
   Google Scholar
• Annuziata, O., Asherie, N., Lomakin, A., Pande, J., Ogun, O., and Benedek, G. B. (2002). Effect of polyethylene glycol on the liquid-liquid phase transition in aqueous protein solutions, PNAS, 99, 14165–14170.
   PubMed Web of Science ®Google Scholar
• Bühler, V. (2005). Polyvinylpyrrolidone Excipients for Pharmaceuticals, Povidone, Crospovidone and Copovidone, Springer-Verlag Berlin Heidelberg, Germany, Berlin, Heidelberg.
   Google Scholar
• Cejka, J., Vodražkaand, Z., and Salgk, J. (1968). Carbamylation of globin in electrophoresis and chromatography in the presence of urea, Biochim. Biophys. Acta, 154, 589–591.
   PubMed Web of Science ®Google Scholar
• Clark, E. D. (2001). Protein refolding for industrial processes, Curr. Opin. Biotechnol., 12, 202–207.
   PubMed Web of Science ®Google Scholar
• Creighton, T. (1993). Proteins, W. H. Freeman and Co, New York.
   Google Scholar
• Fedicheva, N., Ninni, L., and Maurer, G. (2007). Aqueous two-phase systems of poly(vinyl pyrrolidone) and sodium sulfate: experimental results and correlation/prediction, J. Chem. Eng. Data, 52(2), 1858–1865.
   Web of Science ®Google Scholar
• Foroutan, M., and Zarrabi, M. (2008). Activities of water, polymer and salt in liquid–liquid equilibria of polyvinylpyrrolidone and (NH4)2HPO4/(NH4)H2PO4 buffer using the flory-huggins model with Debye–Huckel and Pitzer–Debye–Huckel equations and the osmotic virial model: Effects of pH and temperature, Fluid Phase Equilib., 266(1), 164–171.
   Web of Science ®Google Scholar
• Hagel, P., Gerding, J. J. T., Fieggen, W., and Bloemendal, H. (1971). Cyanate formation in solutions of urea I. Calculation of cyanate concentrations at different temperature and pH, Biochim. Biophys. Acta, 243, 366–373.
   PubMed Web of Science ®Google Scholar
• Hatti-Kaul, R. (2000). Aqueous Two-Phase Systems. Methods and Protocols, Methods in Biotechnology 11, Humana Press, Totowa, NJ, USA.
   Google Scholar
• Parnica, M., and Antalika, M. (2014). Urea and guanidine salts as novel components for deep eutectic solvents, J. Mol. Liq., 197, 23–26.
   Web of Science ®Google Scholar
• Perumalsamy, M., and Murugesan, T. (2009). Phase compositions, molar mass, and temperature effect on densities, viscosities, and liquid–liquid equilibrium of polyethylene glycol and salt-based aqueous two-phase systems, J. Chem. Eng. Data, 54, 1359–1366.
   Web of Science ®Google Scholar
• Pirdashti, M., Movagharnejad, K., Curteanu, S., Dragoi, E. N., and Rahimpour, F. (2015a). Prediction of partition coefficients of guanidine hydrochloride in PEG–phosphate systems using neural networks developed with differential evolution algorithm, J. Ind. Eng. Chem., 27, 268–275.
   Web of Science ®Google Scholar
• Pirdashti, M., Movagharnejad, K., Rostami, A. A., Akbarpour, P., and Ketabi, M. (2015b). Liquid–liquid equilibrium data, viscosities, densities, conductivities, and refractive indexes of aqueous mixtures of poly(ethylene glycol) with trisodium citrate at different pH, J. Chem. Eng. Data, 60(11), 3423–3429.
   Web of Science ®Google Scholar
• Rahimpour, F., and Pirdashti, M. (2010). Effective parameters on the partition coefficient of guanidine hydrochloride in the poly(ethylene glycol) + phosphate + water system at 298.15 K, Iran. J. Chem. Eng., 7, 67–75.
   Google Scholar
• Rämsch, C., Kleinelanghors, L. B., Knieps, E. A., Thommes, J., and Kula, M.-R. (1999). Aqueous two-phase system containing urea; influence on phase separation and stabilization of protein conformation by phase components, Bitechnol. Prog., 15, 493–499.
   PubMed Web of Science ®Google Scholar
• Rocha, M. V., and Nerli, B. B. (2013). Molecular features determining different partitioning patterns of papain and bromelain in aqueous two-phase systems, Int. J. Bio. Macromol., 61, 204–211.
   PubMed Web of Science ®Google Scholar
• Sadeghi, R. (2005). Measurement and correlation of phase equilibria for several PVP + salt aqueous two-phase systems at 303.15 K, Fluid Phase Equilib., 237, 40–47.
   Web of Science ®Google Scholar
• Sadeghi, R. (2006). Measurement and correlation of vapor–liquid equilibria of the poly(vinylpyrrolidone) + NaH2PO4 + H2O system at different temperatures, CALPHAD, 30, 53–60.
   Web of Science ®Google Scholar
• Sadeghi, R., Rafiei, H. R., and Motamedi, M. (2006). Phase equilibrium in aqueous two-phase systems containing poly(vinylpyrrolidone) and sodium citrate at different temperatures-experimental and modeling, Thermochimica Acta, 451(1), 163–167.
   Web of Science ®Google Scholar
• Salabat, A., Moghadasi, M. A., Zalaghi, P., and Sadeghi, R. (2006). (Liquid + liquid) Equilibria for ternary mixtures of (Polyvinylpyrrolidone + MgSO4 + Water) at different temperatures, J. Chem. Thermodynamics, 38, 1479–1483.
   Web of Science ®Google Scholar
• Shahbazinasab, M.-K., and Rahimpour, F. (2012). Liquid−liquid equilibrium data for aqueous two-phase systems containing PPG725 and salts at various pH Values, J. Chem. Eng. Data, 57, 1867–1874.
   Web of Science ®Google Scholar
• Silva, L. H. M. D., and Meirelles, A. J. D. A. (2001). PEG + potassium phosphate + urea aqueous two-phase systems: Phase equilibrium and protein partitioning, J. Chem. Eng. Data, 46, 251–255.
   Web of Science ®Google Scholar
• Wang, Y., Wu, Y., Ni, L., Han, J., Ma, J., and Hu, Y. (2012). Liquid–liquid equilibria of polyvinylpyrrolidone + several ammonium salts + water aqueous two-phase systems: Experimental and correlation, J. Chem. Eng. Data, 57, 3128–3135.
   Web of Science ®Google Scholar
• Wang, Z. H., Song, M., and Ma, Q. (2000). Two-phase aqueous extraction of chromium and its application to speciation analysis of chromium in plasma, Mikrochim. Acta, 134, 95–99.
   Web of Science ®Google Scholar
• Waziri, S. M., Abu-Sharkh, B. F., and Ali, S. A. (2003). The effect of pH and salt concentration on the coexistence curves of aqueous two-phase systems containing a pH responsive copolymer and polyethylene glycol, Fluid Phase Equilib., 205, 275–290.
   Web of Science ®Google Scholar
• Yan-Min, L., Yan-Zhao, Y., Xi-Dan, Z., and Chuan-Bo, X. (2010). Bovine serum albumin partitioning in polyethylene glycol (PEG)/potassium citrate aqueous two-phase systems, Food Bioprod. Process, 88(1), 40–46.
   Web of Science ®Google Scholar
• Zafarani-Moattar, M. T., and Sadeghi, R. (2002). Measurement and correlation of liquid-liquid equilibria of the aqueous two-phase system polyvinylpyrrolidone-sodium dihydrogen phosphate, Fluid Phase Equilib., 203, 177–191.
   Web of Science ®Google Scholar
• Zafarani-Moattar, M. T., and Sadeghi, R. (2005). Effect of temperature on the phase equilibrium of aqueous two-phase systems containing polyvinylpyrrolidone and disodium hydrogen phosphate or trisodium phosphate, Fluid Phase Equilib., 238, 129–135.
   Web of Science ®Google Scholar
• Zafarani-Moattar, M. T., and Seifi-Aghjekohal, P. (2007). Liquid–liquid equilibria of aqueous two-phase systems containing polyvinylpyrrolidone and tripotassium phosphate or dipotassium hydrogen phosphate: Experiment and correlation, CALPHAD, 31(4), 553–559.
   Web of Science ®Google Scholar
• Zafarani-Moattar, M. T., and Zaferanloo, A. (2009). Measurement and correlation of phase equilibria in aqueous two-phase systems containing polyvinylpyrrolidone and di-potassium tartrate or di-potassium oxalate at different temperatures, J. Chem. Thermodyn., 41, 864–871.
   Web of Science ®Google Scholar
• Zafarani-Moattar, M. T., Karimi, N., and Asadzadeh, B. (2015). Investigations of the interactions in aqueous PVP + di-sodium hydrogen citrate solutions using vapor–liquid equilibria studies at different temperatures, J. Mol. Liq., 211, 767–775.
   Web of Science ®Google Scholar
• Zangi, R., Zhou, R., and Berne, B. J. (2009). Urea's action on hydrophobic interactions, J. Am. Chem. Soc., 131, 1535–1541.
   PubMed Web of Science ®Google Scholar