油用牡丹籽粒长期贮藏劣变对其油脂品质的影响

为研究牡丹籽粒贮藏过程自然劣变对籽油品质的影响,采用超临界CO₂萃取技术提取其籽油,分析其主要理化及脂肪酸组成等品质指标。结果表明,当年收获的牡丹新籽粒与自然贮藏12个月以上的陈化籽粒相比,牡丹籽粒陈化劣变导致油品色泽加重变深,酸值、过氧化值和黄曲霉毒素B1含量显著升高,而维生素E含量显著降低,苯并（α）芘升幅较小,处于安全标准之下,但对脂肪酸组分与含量没有显著影响。结果提示,在牡丹籽收储与籽油加工过程中,应尽可能缩短牡丹籽粒贮藏时间,以避免造成油品的质量下降和安全风险升高。 

Effects of natural deterioration of oil tree peony seed with long-term storage on oil quality

In this paper, the effects of natural deterioration of tree peony seed under two storage periods on the quality of seed oil by supercritical CO₂ extraction of tree peony seeds were analyzed. The results showed that compared to newly harvested seeds, oil from naturally aged seeds stored 12 months under room temperature had a darker color, significantly increased contents of acid value, peroxide value, and AFB1, markedly decreased content of vitamin E, marginally increased the Ba P content under the edible vegetable oil safety standards of China, but not clear change in fatty acid composition and contents.These results suggested that the storage period of oil tree peony seeds should be shortened in order to avoid poor oil quality of tree peony seed and increase risk to health.