大豆原油充氮储存品质变化规律的研究

通过对充氮储存和常规储存条件下大豆原油品质指标的检测分析,研究充氮储存条件下大豆原油品质的变化。结果表明:与常规储存的大豆原油相比,在北京地区充氮储存22个月的条件下,大豆原油的气味、滋味、色泽、透明度、羰基值无显著改变,加热试验后色泽变浅,溶剂残留量总体下降;充氮储存的大豆原油酸值、过氧化值较常规储存的上升缓慢。充氮储存对延缓油脂劣变有明显效果,可以延缓油脂氧化速度,对保证油脂储存品质有良好作用。

Change law of quality of crude soybean oil with nitrogen preservation

The quality change of crude soybean oil with nitrogen preservation was studied through detecting and analyzing the quality indicators of crude soybean oils with nitrogen preservation and conventional preservation respectively. The results demonstrated that compared with the crude soybean oil with conventional preservation, there was no significant change in the odor, taste, color, transparency and carbonyl value of crude soybean oil with nitrogen preservation for 22 months in Beijing, the color got lighter in heating test and solvent residue reduced in general; the acid value and peroxide value of crude soybean oil with nitrogen preservation increased more slowly. Nitrogen preservation had significant effect on delaying the deterioration of oil by postponing the oxidation rate of oil, which played a good role in the storage quality of oil.