논문 상세보기
pp.199-203
The oxidation of cholesterol in tallow heated at three frying temperatures, 130, 150 and 180℃ was studied by assaying cholesterol oxidation products(COP) by GC-MS. The correlation between levels of COP and changes of physicochemical parameters (peroxide value, polymer, polar components and dielectric constant) in tallow heated were studied. As temperature increased, the amount of cholesterol was decreased proportionally with heating time. However, the levels of COP did not increase considerably with increased frying temperature. The rate of cholesterol disappearance was the greatest at 180℃ and the smallest at 130℃. Larger amounts of COP formed were found at 150℃ than at 180℃. The levels of COP formed in tallow heated showed highly correlation with(r=0.94, n=30, p$lt;0.01) polymer, polar components and dielectric constant, respectively.
