鱼鳞明胶的提胶工艺

Study on the Fish Scale Gelatin Extracting Technology

根据单因素试验结果,利用正交试验,考察了提胶温度、pH值和时间对鱼鳞明胶品质的影响。并得到提胶条件为:提胶温度为55℃,pH值为6,时间为5h。在该条件下明胶的提取率达到58%,6.67%的明胶溶液在60℃时的黏度为8.16mPa·s,7℃下保温18h后凝胶强度为1 202.65g,约290Bloom,凝胶温度和熔化温度分别为20.8℃,26.9℃,等电点约为pH 7,可达到高品质明胶的要求。

In this paper, influence factors including temperature, pH value and time which affected the qualities of the fish scale gelatin were studied. Experiments were performed by the orthogonal experiment depending on the single factor experiment results. The optimum extracting conditions of the fish gelatin was as follows, extracting temperature 55℃, pH value 6, time 5h. The yield of the fish gelatin extracted was up to 58%. The viscosity and the gel strength of 6.67%gelatin solution were 8.16 mPa·s at 60℃ and 1 202.65 g after kept at 7℃ for 18h, 290 Bloom. The gelling point and the melting point of 6.67% gelatin solution were 20.8℃ and 26.9℃. The isoelectric point （pI） was pH 7.