Sdt q600 simultaneous tga dsc

Thermal properties of CsA, niosomal formulations, physical mixtures and other ingredients were investigated with differential scanning calorimetry (DSC) (TA Instruments SDT-Q600 Simultaneous TGA/DSC). Samples were placed in an aluminum pan and sealed. The rate of purging was taken at 50 mL min⁻¹. Thermograms were taken at a scan rate of 10 ºC min⁻¹ by heating the samples from 10 ºC to 250 ºC under nitrogen atmosphere.14 (link)

¹H and ¹³C NMR spectra were obtained on a Varian VNMRS 500 MHz spectrometer. The molecular mass values of the compounds were analyzed by a Synapt G2 HDMS quadrupole time-of-flight (TOF) mass spectrometer equipped with an electrospray ion source (Waters, Milford, MA, USA) in positive ion mode. DSC results were obtained on a TA Instrument Q200 differential scanning calorimeter with a scan rate of 10 K min⁻¹ under N₂. TGA results were obtained on a TA Instrument SDT Q600 Simultaneous TGA/DSC with a heating rate of 10 K min⁻¹ under N₂. Melting points were observed on an Electrothermal 9300 melting point apparatus with a 1 K min⁻¹ heating rate. Ionic conductivity was measured on a Novocontrol GmbH Concept 40 broad band dielectric spectrometer. Samples for dielectric relaxation spectroscopic measurements were placed on a 30 mm-diameter polished brass electrode and dried in vacuo at 100 °C for 24 h, after which a second polished brass electrode with 15 mm diameter was placed on top of the sample. Also, 50 μm silica-rod spacers were used to control the sample thickness. Data were collected in isothermal frequency sweeps every 5 K from 220 to 0 °C under a dry N₂ flow. Frequency sweeps were performed isothermally from 10 MHz to 0.01 Hz for every measurement.