Siripatrawan and Harte’s method was used to estimate the films’ TP content [36]. Briefly, 25 mg of each film sample was dissolved in 5 ml of distilled water, then 0.1 ml of the extract solution, 7 ml distilled water, and 0.5 ml Folin-Ciocalteu reagent were mixed and stored at ambient temperature for 8 min. Next, 1.5 ml sodium carbonate (2% w/v) and distilled water were added to obtain a finalvolume of 10 ml. The mixture was stirred thoroughly and keptat ambient temperature for 2 h prior to an absorbance reading at765 nm against water on a UV spectrophotometer (Shimadzu UV-VIS 1601, Japan). The following equation was used to express the results as mg gallic acid equivalents (GAE mg/g) per gram of driedfilm.