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Liquid chromatographic separation of darunavir (DRV) enantiomers was studied on Chiralpak IC column containing immobilized cellulose tris(3,5-dichlorophenylcarbamate) using a variety of mobile phase solvents at different temperatures. The separations were accomplished under normal phase conditions using different compositions of  n -hexane, organic modifier (2-propanol, ethanol or 1-propanol) and diethyl amine (0.1%) as mobile phase solvents. The effect of volume and nature of organic modifier and column temperature on retention, separation and resolution were studied. Van't Hoff plots (ln  k ′ vs 1/ T ) were drawn from the chromatographic retention data to calculate to apparent thermodynamic parameters and explain the interactions between the DRV enantiomers and cellulose tris(3,5-dichlorophenylcarbamate) immobilized on silica.

journal of chromatographic science

Thermodynamic Evaluation of Immobilized Cellulose Tris(3,5-Dichlorophenylcarbamate) as a Stationary Phase for Liquid Chromatographic Separation of Darunavir Enantiomers