储藏条件对茶叶籽毛油品质变化的影响

对茶叶籽毛油进行了6个月的储藏实验，模拟工厂实际情况，探究光照、温度和密闭性对茶叶籽毛油品质的影响。结果表明:热榨茶叶籽毛油储藏稳定性较冷榨茶叶籽毛油好，储藏条件对茶叶籽毛油品质的影响大小依次为光照、温度和密闭性；储藏6个月后，茶叶籽毛油酸值、过氧化值增幅均超过100%，氧化稳定指数降幅超过60%，生育酚含量降幅为20%~50%，角鲨烯含量降幅为50%~83%，茶多酚含量降幅为25%~70%；相关性分析发现，热榨茶叶籽毛油的氧化稳定性与生育酚、茶多酚含量相关性较高，冷榨茶叶籽毛油的氧化稳定性则与角鲨烯含量相关性较高。因此，茶叶籽毛油必须避光储藏，同时维持温度稳定，低温尤佳。

Impact of storage condition on the quality of crude tea seed oil

The storage experiments of crude tea seed oil for six months were carried out in accordance with actual factory situation to study the effects of light, temperature and tightness on the quality of crude tea seed oil. The results indicated that the storage stability of crude hot-pressed tea seed oil was better than that of crude cold- pressed tea seed oil; light had the most significant effect on the quality of crude tea seed oil, followed by temperature and tightness; after storing for six months, both the acid value and peroxide value of crude tea seed oil increased by more than 100%, oxidative stability index decreased by over 60%, tocopherol content reduced by 20%-50%, squalene content dropped by 50%-83%, and tea polyphenols content lowered by 25%-70%; besides, the oxidative stability of crude hot-pressed tea seed oil had a remarkable correlation with tocopherol and tea polyphenols contents, while the oxidative stability of crude cold-pressed tea seed oil was markedly related to squalene content. Therefore, the crude tea seed oil must be stored away from light at stable temperature, especially at low temperature.