【摘要】 使用平行板空气隙电容器 ,通过测定精炼植物油经长时间高温加热和常温下长期存放后介电常数的变化。分析了油中的极化成分总含量与油的介电常数的关系 ,结果表明 :提高油温、延长加热时间或长期存放都会使油的介电常数增加 ,从而导致油质量的恶化。此项研究提供了一种测定食用油在使用及存放过程中质量变化的方法。更多还原

【Abstract】 The variation of dielectric constants of several kinds of refine vegetable oil were measured. The edible oil was heated in high temperature and long time, as well as has stored in normal temperature for a long time. The relationship between total polar component in oil and its dielectric constant was analyzed. the deterioration of oil with heated time and heated temperature was studied. This research provides a simple and practical method to determine the variation of oil quality in frying use and storing.更多还原