基于离子液体的菌藻类胡萝卜素提取工艺研究
Research on extraction process of carotenoids from yeasts and algae based on ionic liquid
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摘要: 以含有粘红酵母和小球藻的菌藻泥为原料,通过单因素试验和响应面试验对菌藻类胡萝卜素提取工艺进行优化,并考查菌藻类胡萝卜素的体外抗氧化活性。结果表明:菌藻破壁的最优离子液体为1-丁基-3-甲基咪唑氯化物(BMIMCl),菌藻类胡萝卜素的最佳提取工艺为离子液体浓度1 mol/L、预处理温度53 ℃和预处理时间57 min,在该条件下,菌藻类胡萝卜素的提取量为1.311 mg/g;当质量浓度为30 μg/mL时,菌藻类胡萝卜素对DPPH自由基、·OH自由基和ABTS+自由基的清除率分别为82.3 %、37.6 %、和86.8 %,还原力为0.289,表现出较好的抗氧化活性。因此,经BMIMCl破壁处理后,从菌藻泥中提取的类胡萝卜素含量更高,抗氧化活性也较好。Abstract: Using Rhodotorula glutinis and Chlorella vularis sludge as raw material, the extraction process of carotenoids from yeast and algae was optimized through single factor and response experiments, and the in vitro antioxidant activity of carotenoids from yeast and algae was investigated. The results showed that the optimal ionic liquid for yeast and algal wall breaking was 1-butyl-3-methylimidazole chloride (BMIMCl), and the optimal extraction process for carotene from yeast and algal sludge was 1 mol/L ionic liquid concentration, pre-treatment temperature of 53 ℃, and pre-treatment time of 57 min. Under this condition, the extraction amount of carotene from yeast and algae was 1.311 mg/g. When the mass concentration was 30 μg/mL, the scavenging rates of DPPH free radical, ·OH free radical and ABTS+ free radical were 82.3 %, 37.6 % and 86.8 %, respectively, and the reducing power was 0.289, showing good antioxidant activity. The yeast and algal sludge treated with BMIMCl had a higher content of extracted carotenoids and better antioxidant activity.
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Key words:
- ionic liquid /
- yeast and algal sludge /
- carotenoids /
- extraction process /
- antioxidant activity
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