Detection of mass loss shown by samples during heating at high temperatures. A analysis is conducted on a thermobalance, which monitors the weight of the sample during the heat treatment carried out, from room temperature to the maximum temperature of 1100oC, in an oven with controlled heating speed of up to 15oC/min. The results allow the identification of the temperature ranges in which the samples lose weight during heating and can also help in identifying dehydration, combustion, volatilization and other reactions that occur concomitantly with weight change.