scholarly journals Injection of ethanol into supercritical CO_2: Determination of mole fraction and phase state using linear Raman scattering

2007 ◽  
Vol 15 (13) ◽  
pp. 8377 ◽  
Author(s):  
Andreas Braeuer ◽  
Stefan Dowy ◽  
Alfred Leipertz ◽  
Robert Schatz ◽  
Eberhard Schluecker
Keyword(s):  
Raman Scattering ◽  
Mole Fraction ◽  
Phase State

scholarly journals Solubilization of Trans-Resveratrol in Some Mono-Solvents and Various Propylene Glycol + Water Mixtures

Molecules ◽  
2021 ◽  
Vol 26 (11) ◽  
pp. 3091
Author(s):  
Mohammed Ghazwani ◽  
Prawez Alam ◽  
Mohammed H. Alqarni ◽  
Hasan S. Yusufoglu ◽  
Faiyaz Shakeel
Keyword(s):  
Propylene Glycol ◽  
Mole Fraction ◽  
Bioactive Compound ◽  
Theoretical Models ◽  
Solubility Parameters ◽  
Hansen Solubility Parameters ◽  
Neat Water ◽  
Dissolution Properties ◽  
Hansen Solubility

This research deals with the determination of solubility, Hansen solubility parameters, dissolution properties, enthalpy–entropy compensation, and computational modeling of a naturally-derived bioactive compound trans-resveratrol (TRV) in water, methanol, ethanol, n-propanol, n-butanol, propylene glycol (PG), and various PG + water mixtures. The solubility of TRV in six different mono-solvents and various PG + water mixtures was determined at 298.2–318.2 K and 0.1 MPa. The measured experimental solubility values of TRV were regressed using six different computational/theoretical models, including van’t Hoff, Apelblat, Buchowski–Ksiazczak λh, Yalkowsly–Roseman, Jouyban–Acree, and van’t Hoff–Jouyban–Acree models, with average uncertainties of less than 3.0%. The maxima of TRV solubility in mole fraction was obtained in neat PG (2.62 × 10−2) at 318.2 K. However, the minima of TRV solubility in the mole fraction was recorded in neat water (3.12 × 10−6) at 298.2 K. Thermodynamic calculation of TRV dissolution properties suggested an endothermic and entropy-driven dissolution of TRV in all studied mono-solvents and various PG + water mixtures. Solvation behavior evaluation indicated an enthalpy-driven mechanism as the main mechanism for TRV solvation. Based on these data and observations, PG has been chosen as the best mono-solvent for TRV solubilization.

Determination of the size and composition of multicomponent ethanol/water droplets by cavity-enhanced Raman scattering

2003 ◽  
Vol 380 (5-6) ◽  
pp. 665-672 ◽  
Author(s):  
Rebecca J. Hopkins ◽  
Rachel Symes ◽  
Robert M. Sayer ◽  
Jonathan P. Reid
Keyword(s):  
Raman Scattering ◽  
Water Droplets ◽  
Enhanced Raman Scattering
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