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Ergebnisse nach Hochschule und Institut
Publikation Comparative drug solubility studies using shake-flask versus a laser-based robotic method(Springer, 2023) Rahimpour, Elaheh; Moradi, Milad; Sheikhi-Sovari, Atefeh; Rezaei, Homa; Rezaei, Hadis; Jouyban-Gharamaleki, Vahid; Kuentz, Martin; Jouyban, AbolghasemDrug solubility is of central importance to the pharmaceutical sciences, but reported values often show discrepancies. Various factors have been discussed in the literature to account for such differences, but the influence of manual testing in comparison to a robotic system has not been studied adequately before. In this study, four expert researchers were asked to measure the solubility of four drugs with various solubility behaviors (i.e., paracetamol, mesalazine, lamotrigine, and ketoconazole) in the same laboratory with the same instruments, method, and material sources and repeated their measurements after a time interval. In addition, the same solubility data were determined using an automated laser-based setup. The results suggest that manual testing leads to a handling influence on measured solubility values, and the results were discussed in more detail as compared to the automated laser-based system. Within the framework of unavoidable uncertainties of solubility testing, it is a possibility to combine minimal experimental testing that is preferably automated with mathematical modeling. That is a practical suggestion to support future pharmaceutical development in a more efficient way. © 2023, The Author(s), under exclusive licence to American Association of Pharmaceutical Scientists.01A - Beitrag in wissenschaftlicher ZeitschriftPublikation Solubility of 5-aminosalicylic acid in {N-methyl-2-pyrrolidone + ethanol} mixtures at T = (293.2 to 313.2) K(Elsevier, 28.02.2020) Moradi, Milad; Kuentz, MartinThe solubility determination of 5-aminosalicylic acid (mesalazine) in the N-methyl-2-pyrrolidone (NMP)/ethanol mixtures was carried out at T = (293.2 to 313.2) K. The solubility data were represented by the Jouyban-Acree, NRTL and UNIQUAC models. Apparent thermodynamic quantities for mesalazine dissolved in NMP/ethanol mixtures were determined. To discuss solute-solvent interactions in the present system, the activity coefficient values for mesalazine were computed. The results revealed that the solubility increases by addition of NMP and reaches a maximum value at neat NMP which is consistent with the minimum values of both Gibbs free energy of dissolution and mesalazine activity coefficient observed at neat NMP. Moreover, this drug is preferentially solvated by ethanol in ethanol-rich mixtures but preferential solvation by NMP in NMP-rich mixtures is observed.01A - Beitrag in wissenschaftlicher Zeitschrift