Extraction Process Optimization and Antioxidant Activity of Polyphenols from Bangia fusco-purpurea
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摘要: 为研究红毛藻多酚提取工艺及其抗氧化活性,采用溶剂浸提法提取多酚,选取提取时间、提取温度、乙醇体积分数、料液比为单因素,进一步通过正交试验优化确定最佳提取工艺。以DPPH和ABTS自由基清除率为指标,评价红毛藻多酚的抗氧化活性。结果显示,红毛藻多酚的最佳提取工艺为:浸提温度70 ℃,浸提时间70 min,乙醇体积分数60%,料液比1:10 g/mL,此条件下多酚提取量为(9.67 ± 0.14)mg/g。抗氧化活性评价显示,红毛藻多酚对DPPH和ABTS自由基有一定的清除能力,其IC50值分别为0.313、0.445 mg/mL。研究结果表明正交优化提取红毛藻多酚的工艺简单可行,此方法提取多酚具有较强的抗氧化活性。红毛藻多酚具有开发为天然抗氧化剂的潜力,有较好的应用前景。Abstract: In order to study the extraction process and antioxidative activity of polyphenols from Bangia fusco-purpurea, solvent extraction was used to extract polyphenols. The polyphenol content in the extract was used as an index. The extraction time, extraction temperature, ethanol volume fraction, and liquid-liquid ratio were single factors. Further, the optimal extraction process was determined by orthogonal experiment optimization. The clearance rate of DPPH and ABTS free radical were used as indicators to evaluate the antioxidative activity of B. fusco-purpurea polyphenols. The results showed that the optimum extraction conditions were as follows: Extraction temperature 70 ℃, extraction time 70 min, volume fraction of ethanol 60%, ratio of material to liquid 1:10 g/mL.Under these conditions, the extraction amount of B. fusco-purpurea polyphenols was (9.67 ± 0.14) mg/g. Antioxidant activity evaluation showed that B. fusco-purpurea polyphenols had a certain scavenging ability to DPPH• and ABTS+•, with IC50 values of 0.313, 0.445 mg/mL. The results showed that the orthogonal optimization process for extracting B. fusco-purpurea polyphenol was simple and feasible, the polyphenols had certain antioxidant capacity. B. fusco-purpurea polyphenol has the potential to be developed as a natural antioxidant and has a good application prospect.
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Key words:
- Bangia fusco-purpurea /
- polyphenol /
- extract technology /
- antioxidant activity
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表 1 正交试验因素水平表
Table 1. Factors and levels of orthogonal test
水平 A提取时间(min) B提取温度(℃) C料液比(g/mL) D乙醇体积分数(%) 1 50 65 1:10 55 2 60 70 1:20 60 3 70 75 1:30 65 表 2 正交试验结果
Table 2. The results of orthogonal test
试验号 A B C D 多酚提取量(mg/g) 1 1 1 1 1 8.33 ± 0.13 2 1 2 2 2 8.61 ± 0.17 3 1 3 3 3 6.05 ± 0.15 4 2 1 2 3 7.6 ± 0.14 5 2 2 3 1 6.19 ± 0.16 6 2 3 1 2 8.70 ± 0.17 7 3 1 3 2 6.74 ± 0.13 8 3 2 1 3 9.23 ± 0.14 9 3 3 2 1 8.95 ± 0.11 k1 7.67 7.56 8.76 7.83 k2 7.50 8.01 8.39 8.02 k3 8.31 7.90 6.33 7.63 R 0.81 0.45 2.43 0.39 表 3 方差分析结果
Table 3. The variance analysis results
因素 偏差平方和 自由度 均方 F值 显著性 A 3.264 2 1.632 77.913 ** B 1.006 2 0.503 24.023 ** C 30.711 2 15.355 733.015 ** D 0.684 2 0.342 16.337 ** 误差 0.377 18 0.021 注:**表示极显著,P<0.01;*表示显著,P<0.05。 -
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