Instrument dependence and influence of heating rate, mass, Delta H, purge gas and flow rate on the difference between the experimental and programmedtemperature of the instrument

It has been observed that for endothermic decomposition processes a thermal analysis unit may fail to follow the programmed temperature. A more thorou gh study shows that the magnitude of the failure of a thermal analysis unit , i.e. the difference between the experimental and programmed temperature, is dependent on the type of the instrument and is also influenced by the he ating rate, the mass of the sample, the enthalpy change (Delta H) of the pr ocess, the purge gas and the flow rate. (C) 1999 Elsevier Science B.V. All rights reserved.