Separation and Purification and Antioxidant Activity of Polyphenols from Sargassum horneri
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摘要: 为研究铜藻多酚的分离纯化工艺及抗氧化活性。在超声辅助提取铜藻多酚的基础上采用大孔吸附树脂柱层析法分离纯化铜藻多酚提取物,以VC为对照采用体外实验分析其抗氧化活性。结果显示:大孔吸附树脂LX-158具有最佳的吸附和解析条件,静态吸附和解析平衡时间为5 h,动态吸附和解析的最佳条件为:粗提液和洗脱剂流速为3 mL/min,上样体积为10 mL,洗脱剂为40%乙醇溶液,洗脱剂体积为120 mL。此条件下铜藻多酚纯度从7.52%提高到40.31%。体外抗氧化活性结果显示:不同浓度的铜藻多酚对DPPH自由基、ABTS自由基、超氧阴离子自由基、羟自由基有明显的清除作用和Fe3+还原力,随着多酚浓度增大其抗氧化能力增强,IC50值分别为6.60 μg/mL、75.70 μg/mL、2.22 mg/mL、5.62 mg/mL。实验证明该纯化工艺可行且稳定,可以作为铜藻多酚纯化的工艺条件。Abstract: In order to study the separation and purification process and antioxidant activity of Sargassum horneri polyph-enols, on the basis of ultrasonic assisted extraction of Sargassum horneri polyphenols, macroporous adsorption resin column chromatography was used to separate and purify Sargassum horneri polyphenol extract, and VC was used as the control to analyze its antioxidant activity in vitro. The results showed that the macroporous adsorption resin LX-158 exhibited the best adsorption and analysis conditions. The equilibrium time for static adsorption and analysis was 5 h. The following circumstances were ideal for dynamic adsorption and analysis: The flow rate of crude extract and eluent was 3 mL/min, the loading volume was 10 mL, the eluent was a 40% ethanol solution, and the eluent volume was 120 mL. The purity of Sargassum horneri polyphenols increased from 7.52% to 40.31% under these conditions. Antioxidant activity studies revealed that varied doses of Sargassum horneri polyphenols had noticeable scavenging effects on DPPH radical, ABTS radical, superoxide anion radical, hydroxyl radical and Fe3+ reducing power. With the increase of polyphenol concen-tration, its antioxidant capacity improved, and the IC50 was 6.60 μg/mL, 75.70 μg/mL, 2.22 mg/mL, 5.62 mg/mL, respec-tively. The purification process is feasible and stable, and it can be used as a process condition for the purification of polyphenols from Sargassum horneri.
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表 1 11种大孔吸附树脂吸附和解析效果
Table 1. Effect of adsorption and desorption of 11 macroporous adsorption resins
树脂种类 吸附率
(%)吸附量
(mg/g)解析率
(%)解析量
(mg/g)X-15 35.33 2.48 62.10 1.54 LX-8 59.57 4.18 22.92 0.96 DM130 32.99 2.32 49.32 1.14 HP20 39.87 2.80 48.83 1.37 HI-816 52.00 3.65 67.62 2.47 NKA 26.82 1.88 47.13 0.89 NKA-9 53.16 3.73 77.07 2.88 AB-8 27.40 1.92 53.02 1.02 D101 39.41 2.77 51.25 1.42 D1400 30.78 2.16 50.98 1.10 LX-158 58.87 4.13 81.19 3.36 -
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