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Influence of cosolvents, ionic strength and the method of sample preparation on the solubilization of curcumin by Pluronics and HP-gamma-cyclodextrin. Studies of curcumin and curcuminoids, XLIV.
Curcumin was solubilized by Pluronics and the concentration of dissolved curcumin seemed to be related to the number of propylene oxide units in the Pluronic polymer. All Pluronics showed a maximum solubilizing capacity at a certain curcumin: Pluronic molar ratio and exceeding this molar ratio resulted in precipitation of curcumin when following the samples for 356 hours. PEG 400 could to a certain extent stabilize the supersaturated samples, while ethanol physically destabilized the samples. Ionic strength did not influence the solubilization of curcumin by the Pluronics. Supersaturation and precipitation inhibition caused a higher concentration of curcumin in samples prepared by SEM compared to samples prepared by SFM (i.e. the thermodynamic solubility).
Calorimetry, Differential Scanning
Chromatography, High Pressure Liquid
Microscopy, Electron, Scanning
Reproducibility of Results
Pub Type(s)Journal Article