
Keywords: طیف سنجی مادون قرمز تبدیل فوریه تضعیف شده است; API; active pharmaceutical ingredient; ATR-FTIR; attenuated total reflection fourier transform infrared spectroscopy; DSC; differential scanning calorimetry; GE; gelatin; GET; gelatin film with 2% TiO2; HPMC; hydroxypropylmethylencellulose film; HPMCT; hy