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| 茶树花提取物及对茶叶籽油抗氧化作用的研究 |
| Tea flower extract and its antioxidant effect on tea seed oil |
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| DOI： |
| 中文关键词: 茶树花提取物 抗氧化能力 儿茶素 茶叶籽油 |
| 英文关键词:tea flower extract antioxidant ability catechin tea seed oil |
| 基金项目: |
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| 中文摘要: |
| 采用乙醇为溶剂提取茶树花中的抗氧化物质，将提取液浓缩后的浓缩液加入到茶叶籽油中，通过真空干燥的方式使乙醇含量降至国标限量范围内，与直接以茶叶籽油浸提茶树花的添加方式及添加常用抗氧化剂的抗氧化效果进行比较，并以市售茶多酚代替茶树花进行对比实验。结果显示：茶树花提取物明显改善茶叶籽油的氧化稳定性，特别是以乙醇为载体的添加方式效果更为明显；茶树花提取物的抗氧化能力强于BHT、BHA，与脂溶性儿茶素的效果相当，弱于TBHQ。此外，以乙醇为载体的添加方式与直接浸提相比，前一种方式处理的茶叶籽油中儿茶素含量有所增加，黄酮含量也明显提高，此现象由市售茶多酚对比实验组所证实。 |
| 英文摘要: |
| The antioxidants in tea flower were extracted by ethanol. The extract was concentrated and added to tea seed oil. The content of ethanol in tea seed oil was controlled within the limitation of national standard by vacuum drying. The antioxidant effect of tea flower extract was compared with tea flower soaked in tea seed oil，and common antioxidants. A contrast experiment was carried out using commercial tea polyphenols to replace tea flower. The results indicated that the oxidative stability of tea seed oil was significantly improved by tea flower extract. Especially，the effect of tea flower extract added with ethanol as carrier was better. The antioxidant ability of tea flower extract was better than that of BHA and BHT，comparable to that of lipid-soluble catechins，but weaker than that of TBHQ. In addition，compared with soaking directly，the contents of catechin and flavonoids in tea seed oil increased through addition of tea flower extract with ethanol as carrier. The phenomenon was confirmed by the contrast experiment of commercial tea polyphenols. |
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