2.6. Differential Scanning Calorimetry (DSC)

In this study, a differential scanning calorimeter (DSC 214 Polyma Netzsch, Selb, Germany) was used to record the thermograms of LUT, EGT, EC, LUT/EGT gastric floating microsponge formulation (F-1), and LUT/EGT/EC gastric floating microsponge formulation (F-3). 4 to 5 mg of the sample was weighed in DSC aluminium pan and then the pan was hermetically sealed. The sealed pans were then transferred to the DSC instrument for the recording of thermograms of the samples. The DSC measurements of each sample were performed in a nitrogen atmosphere (40 mL/60 mL min⁻¹) between 0 and 400 °C at a heating rate of 10 °C min⁻¹.