| 摘要 |
Temperature modulated thermogravimetric analysis (TMTGA) method for analyzing a sample and a thermogravimetric analysis (TGA) instrument for carrying out said method. The TGA instrument comprises a furnace arranged in a furnace housing, an electronic balance with a load receiver arranged in a balance housing, wherein the load receiver extends into the furnace housing, said measuring position is arranged at one end of the load receiver within the furnace housing and a control unit for controlling the balance and/or the furnace. The TMTGA method comprises the steps of: placing the sample on a measuring position in a TGA instrument, which comprises; subjecting the sample to a temperature program provided by the control unit, which varies the temperature of the furnace; measuring the mass change (m(T,t)) of said sample while being subjected to said temperature program as a function of time and; determining at least one kinetic parameter of the sample by analyzing said mass changes; characterized in that the temperature program (T(t)) is a stochastic and/or event controlled temperature program providing temperature-time setpoints for controlling the sample temperature and comprising an underlying temperature change ( T (t)) superimposed by a temperature perturbation (´T(t)) with a characteristic time of modulation (Ä) according to T(t) = T (t) + ´T(t). |
