| 摘要: |
| 目的 探究不同品种柑橘果皮中主要抗氧化成分的含量与其抗氧化活性、纳米银还原效率间的关系。方法 从8个品种的橘皮中分别提取类黄酮、可溶性酚酸和维生素C，测定各自的成分、含量以及抗氧化活性；采用8种橘皮的提取液制备纳米银，测定其还原率和纳米银粒径；将橘皮中抗氧化性物质的含量分别与IC50值（DPPH质量分数降到50%时抗氧化剂的质量分数）和纳米银还原率进行相关性分析。结果 8种橘皮中类黄酮、酚酸和维生素C的含量有显著性差异；8种橘皮的提取液均可成功制备纳米银，其中天草柑橘皮的还原率最高，且所制得的纳米银粒径最小。橘皮对纳米银的还原效率与其类黄酮、酚酸和维生素C的抗氧化性显著相关，与类黄酮中的新橙皮苷、酚酸中的芥子酸以及维生素C的含量显著相关。结论 纳米银的合成主要利用了橘皮类黄酮中的新橙皮苷、酚酸中的芥子酸和维生素C的还原性，且所测量的8种柑橘中天草柑橘皮合成纳米银的效果最好。 |
| 关键词: 柑橘皮 纳米银 类黄酮 酚酸 维生素C 抗氧化活性 |
| DOI： |
| 分类号: |
| 基金项目:重庆市社会事业与民生保障科技创新专项一般项目（cstc2015shmszx80011）；中央高校基本科研业务费重点项目（XDJK2016B012） |
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| Relationship between the Content of Antioxidant Components in Citrus Peels and Their Reduction Efficiency towards Nano-silver |
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WANG Ting, CHEN Xiao, YU Jia-lun, XU Dan
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College of Food Science, Southwest University, Chongqing 400715, China
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| Abstract: |
| The work aims to study the relationship between the content of antioxidant components in citrus peels, their antioxidant activities and the reduction efficiency towards nano-silver. Flavonoids, soluble phenolic acids and vitamin C were extracted from the citrus peels of eight different varieties, respectively. The constituents, contents and their antioxidant activities were determined. Nano-silver was then synthesized separately with the extracts of these citrus peels, and the reduction efficiency and size of nano-silver were determined. Correlation analysis was conducted between the contents of antioxidant components and IC50 values (the mass fraction of antioxidant when DPPH mass fraction was reduced to 50%), as well as the reduction efficiency towards nano-silver, respectively. The contents of flavonoids, phenolic acids and vitamin C in the eight kinds of citrus peels were signifi-cantly different. Nano-silver was successfully synthesized by all the extracts of these citrus peels, separately. However, peels of Amakusa showed the highest reduction efficiency and the lowest size of nano-silver prepared. The reduction efficiency of citrus peel extracts towards nano-silver was significantly correlated with the antioxidant activities of flavonoids, phenolic acids and vitamin C in citrus peels, and was also significantly correlated with the contents of new hesperidin of flavonoids, erucic acid of phenolic acids and vitamin C. The synthesis of nano–silver was mainly contributed by the reduction effects of new hesperidin of flavonoids, erucic acid of phenolic acids and vitamin C in citrus peels. The peels of Amakusa show the best performance to synthesize nano-silver among the eight varieties of citruses tested in this study. |
| Key words: citrus peel nano-silver flavonoid phenolic acid vitamin C antioxidant activity |
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