鸡皮明胶的制备及性质研究

Studies on the Preparation and Character of Gelatin from Chicken Skins

目的:以鸡皮为原料,制备一种新型明胶。方法:以酸法提取明胶并检测其性质,探讨了制备条件对鸡皮明胶的粘度、凝胶强度、透明度和色泽等方面影响。结果:其最适提胶条件为:pH4.7,提胶温度60℃,提胶时间3h,在此条件下明胶得率较高,色泽浅白,透明度高,其凝胶强度可达到258 Bloomg。结论:以鸡皮为原料可生产优质明胶,使鸡皮资源得到合理利用。

A new kind of gelatin was preparated from chicken skins. The gelatin was extracted with the acid techniques, and their characterizations were examined. The effect of processing conditions on the viscosity, gel strength, transparency and color of gelatin were studied. Results showed that the optimum extraction conditions were as follows： pH 4.7-5.0, extraction temperature 60℃, extraction time 3.0 h. With this condition, the yield of gelatin was relatively high, and the gelatin product was white and transparent, the Bloom gel strength may reach to 258 g. The viscosity of the solution contained 1.5% gelatin may reach to 450 s at 25℃. A good quality gelatin may be prepared from chicken skins, thus the rational use of chicken skins resource may be obtained.