Calculating Weight Loss Rate: TGA/DSC Measurements

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Oxygenne
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I want to calculate the rate of weight loss and not sure should I keep the initial mass at the initial time always or should I use the previous mass of recorded data

should be m0 as inital value always or is should change to m3-m2, m4-m3, in this way.

I plotted the graph and it does not have a similar shape so i have to make a choice but I am confuse.

I look forward to your advise. Thank you!
 
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Oxygenne said:
I want to calculate the rate of weight loss and not sure should I keep the initial mass at the initial time always or should I use the previous mass of recorded data

should be m0 as inital value always or is should change to m3-m2, m4-m3, in this way.

I plotted the graph and it does not have a similar shape so i have to make a choice but I am confuse.

I look forward to your advise. Thank you!
It depends on what you want. Do you want to see, on your graph, the weight that is lost each second, or the weight that have been lost since the beginning of the run?

TP
 
It is usually the instantaneous rate of mass loss (dm/dt) that is the useful quantity, and therefore the slope of the mass curve is what one typically uses.