微量金属元素对乌桕类可可脂氧化稳定性研究(Ⅰ)

Study on the Influence of Trace Metals to the Oxidization Stability of CTCBE(Ⅰ)

油脂中的微量金属元素是影响油脂氧化稳定性的重要因素之一。为评价金属元素对乌桕类可可脂(CTCBE)氧化稳定性的影响,本研究以天然可可脂(CB)作对照,用电感耦合等离子体质谱仪(ICP-MS)对CTCBE及CB中的微量元素铜、铁、锰、铬、钴、镍、铝、钡进行测定,并用烘箱贮藏法测定它们的氧化稳定性能。结果表明,CTCBE及CB中的这些元素,含量大部分都较低,但Cu、Fe含量比CTCBE还要高,可是CB的氧化稳定性好,而CTCBE极易氧化酸败。

s Trace metals in oils are a kind of important factor of oils' oxidization stability.To evaluate the quality of CTCBE and CB,trace metals(Cu、Fe、Co etc)from oils were determined by ICPMS,and their oxidization stability was compared by oven method.The results showed that most of these metals in CTCBE and CB were in low concentration,but active Cu、Fe、were in high concentration,especially in CB. However,CB's stability was high,where as CTCBE was easily oxidized.