Abstract:

During preparation of gelatin from BaSa fish skin, effects of H2SO4 concentration, H2SO4 treatment time, materialliquid ratio, extraction time and extraction temperature on extraction rate of gelatin were investigated. The optimal gelatin extraction condition was 1% H2SO4 treatment for 8 h, 1:5 (g/ml) of material-water ratio, and extraction at 45 ℃ for 4 h. The yield of gelatin was 66.13% ± 1.27% under this optimal condition. The content of proline and hydroxyproline was 18.928% and gel strength was 234 g. Melting and gel points were 22.2 ℃ and 14.2 ℃, respectively.

Key words: BaSa fish skin, gelatin, yield, gel strength, melting temperature, gel temperature