大豆油不同储藏技术的效果研究

Effects of different storage technologies on soybean oil

通过在高温40℃条件下对大豆油进行充N2、加脱氧剂、负压、添加TBHQ方式储藏,同时研究15、25、40℃常规储藏条件下的密闭储藏,经过储藏240 d,每隔30 d取样测定,研究了储藏期间大豆油的色泽、酸值、过氧化值、碘值及p-茴香胺值的变化规律。结果表明:同样的储藏条件下,温度越低储藏效果越好;在40℃条件下,添加TBHQ效果最好,脱氧效果稍优于负压,充N2效果最差;充N2、加脱氧剂、负压等气调方式并不能从根本上解决高温下油脂氧化酸败问题,而添加TBHQ可以极大地减缓大豆油品质劣变。

The effects of four different storage methods, filling nitrogen, deoxidation, negative pressure adding TBHQ, and sealed storage under conventional conditions at 15,25,40 ℃ on the colour, acid value, peroxide value, iodine value and p - anisidine value of soybean oil storaged for 240 d were studied. The five indicators of soybean oil were tested every 30 d. The results showed that under the same storage con dition, the lower the temperature was, the better the storage effect was;the effect of adding TBHQ was the best, deoxidation was a little better than negative pressure and filling nitrogen was the worst at 40℃;the air condition methods of filling nitrogen, deoxidation and negative pressure couldn＇t radically solve the problem of oil oxidative rancidity at high temperature. The quality deterioration of soybean oil could be greatly postponed by adding TBHQ