I am currently trying to figure out the data for my DSC and TGA experiment. DSC being differential calorimetry scanning and TGA being theromgravimetric analysis. I understand the concept of the instruments, what they are measuring. The DSC is measuring the change in heat flow to each of the sample holders and in the end determining if the process was exothermic or endothermic. The TGA measuring the difference of mass in terms of temperature to determine phase transitions.
But, I look at the readouts and graphs and I just don't understand what to do with them. For the DSC the graph has a lot of peaks, the information it includes are the onset and end of the peak (which are temps), the area (in mJ), the delta H (in J/g) and the peak height (in mW). The axis of the graph are Temperature (x) x Heat flow (mW) (y). What do I do with this data and how do I determine if it is endo-or exo-thermic??
For the TGA, it is basically a descending line with a slight slope. The information given in this graph is onset, inflection point (degrees C) and the delta Y (mg), how do I determine the water loss?
If anyone could help, it would be greatly appreciated. This lab is really confusing me.