Differential scanning calorimetry DSC curve peak-splitting fitting method

The invention discloses a differential scanning calorimetry DSC curve peak-splitting fitting method. According to the method, a heat flow rate-temperature curve is drawn by utilizing DSC test data; determining a baseline required for calculating the peak area; determining the position of a possible endothermic (exothermic) peak tip; according to the base line and the peak tip position, a Bigaussian function is adopted to perform peak division on the coincident peaks; dividing substance types to which different peaks belong according to peak temperature positions of measured substances, superposing the different peaks of the same type of substances to obtain peak areas of the substances, calculating enthalpy change values according to the peak areas, and obtaining concentrations of the substances according to the enthalpy change values. According to the method, the overlapping peaks of the DSC curve can be well distinguished so that the concentration of each substance is accurately calculated, and the calculat