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od 2020-09-20

Title: Thermal analysis in evaluation of the radiochemical stability of some fungicidal drugs

Source: Journal of Thermal Analysis and Calorimetry

Year : 2004

Abstract:

Four azole derivatives showing antimycotic activity (Miconazole, Ketoconazole, Clotrimazole, Fluconazole) in solid phase were exposed to beta irradiation at the dose of 20–200 kGy and then alterations in the physicochemical properties of the above derivatives were studied using the methods: scanning electron microscopy (SEM), differential scanning calorimetry (DSC) and X-ray diffraction (XRD) analysis. It was found that the compounds irradiated with sterilising doses (20–50 kGy) showed no significant alterations in their physicochemical properties, while application of doses >50 kGy resulted in small changes in the X-ray diffraction patterns and in the course of DSC curves, including a decrease in the melting points and enthalpy of the process. For Miconazole and Fluconazole, a linear and relatively strong correlation was found (from r =0.9782 to r =0.9003) between the size of the dose of irradiation and the decrease in the melting point and enthalpy value.

DOI: 10.1023/B:JTAN.0000033215.77806.b0   (Pobrane:  aktualizowanie)