돈피젤라틴 생산시 염산농도와 세척시간이 최종제품 품질에 미치는 영향 = Effect of HCl Concentration and Washing Time During the Manufacture of Pigskin Gelatin on the Final Product Quality

다국어 초록 (Multilingual Abstract)

Raw pigskins purchased from a local processor were cut into the size of 5 ㎝ × 5 ㎝ after trimmed of visible fat. Being washed in tap water for 8-10hr, they were soaked in 1.7% or 5% HCl solution for 15-18hr. Acidified pigskins were rewashed by tap water for either 2 or 10hr prior to the extraction of gelatin at 60℃, 70℃ and 80℃. When the rewashing after the acidification was carried out for 10hr, gelatin manufactured with the acidification in 1.7% HCl solution showed suprior gel strength than that with the acidification in 5% HCl solution. When HCl concentration was fixed at 1.7%, the rewashing for 10hr resulted in better gelatins in terms of gel strength and viscosity. Chemical composition showed that gelatin with the rewashing for 2hr was higher in lipid content than that with 10hr rewashing. These differences appeared to be due to the lower pH of raw materials after rewashing for 2hr than for 10hr. It can be concluded that after acidified in 1.7% HCl solution, raw materials should be rewashed to have pH above 4 in order to produce the gelatin of good quality.