thermodynamic and calorimetric study of acetylsalicylic acid (aspirin) and ibuprofen
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ID: 220293
2011
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Abstract
Enthalpies of solution and dilution of aqueous solutions of sodium acetylsalicylic acid salt and ibuprofen salt were measured with an isoperibolic calorimeter at 293.15 K, 298.15 K, 303.15 K, 308.15 K and 318.15 K. The concentration of the electrolyte was restricted to the solubility of the salt at various temperatures and did not exceed 0.035–0.057 mol kg-1, depending on the temperature studied. The Virial coefficients were derived from Pitzer's model and the excess thermodynamic functions of both the solution and the components of the solution were calculated. An analysis of the thermodynamic characteristics of the solution in terms of concentration and temperature interval was carried out and discussed. Additionally, an analysis was performed by differential scanning calorimetry (DSC).
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moreno-pirajn2011e-journalthermodynamic
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| Authors | ;Juan Carlos Moreno-Piraján;Vanessa Silenia García-Cuello;Liliana Giraldo-Gutierréz |
| Journal | Journal of pharmaceutical and biomedical analysis |
| Year | 2011 |
| DOI |
10.1155/2011/402395
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