1993 Volume 9 Issue 5 Pages 701-706
The melting peak in differential scanning calorimetry, DSC, has no symmetry, so the common separation techniques of overlapped peaks may not be applied. The melting peak of indium measured by heat-flux type of DSC was used as a model peak. The doubly overlapped sample peaks differing in each peak parameter: position P, height H and width W were prepared from the model peaks. Therefore, six variables were determined by a modified simplex optimization method. For diminishing the run time, an effective execution of the peak separation was considered. Peak area S was also involved for the calculation of H. Random noises from 0.5% to 2% were added to every data point of the sample peaks, and the overlapped peaks were separated by the proposed algorithm. The discrepancy in base lines before and after the peak was taken into consideration. Fairly good results were obtained for P and reasonable ones for H, W and S.