APP下载

荔枝壳多糖的超声波提取及其抗氧化活性研究

2016-10-21赵丹丹陈盛余凌绍明等

安徽农业科学 2016年4期

赵丹丹 陈盛余 凌绍明等

摘要[目的]优化荔枝壳多糖的超声提取工艺,并研究其抗氧化活性。[方法]通过单因素试验和正交试验研究提取温度、提取时间、提取功率和料液比对荔枝壳多糖提取率的影响,确定最佳提取工艺;采用总抗氧化活性评价荔枝壳多糖的抗氧化活性。[结果]荔枝壳多糖的最佳提取工艺为提取温度80 ℃,提取时间2.5 h,超声功率180 W,料液比为1∶25 g/mL;荔枝壳多糖总抗氧化活性随多糖浓度增大而提高。[结论]该提取工艺简单、高效,荔枝壳多糖提取率高,提取的多糖具有抗氧化活性。

关键词荔枝壳多糖;超声波提取;抗氧化活性

中图分类号S667.1文献标识码A文章编号0517-6611(2016)04-123-03

The Ultrasonic Extraction of Litchi Pericarp Polysaccharides and Study on Its Antioxidant Activity

ZHAO Dandan, CHEN Shengyu*, LING Shaoming et al(Key Laboratory of Ecological Environmental Analysis and Pollution Control of Universities in Guangxi, Baise University, Baise, Guangxi 533000)

Abstract[Objective] The aim was to optimize ultrasonic extraction conditions and study antioxidant activities of litchi pericarp polysaccharides. [Method] The effects of extraction temperature, time, ultrasonic power, solidtoliquid ratio on polysaccharides yield were investigated by singlefactor experiments and orthogonal experiment to obtain optimum extraction conditions; the antioxidant activities of litchi pericarp polysaccharides were evaluated by the total antioxidant activity. [Result] Optimum extraction process were extraction temperature of 80 ℃, extraction time of 2.5 hours, ultrasonic power of 180 W, solidliquid ratio of 1∶25 g/mL; the total antioxidant activity was increased with the increasing concentration of polysaccharides. [Conclusion] The extraction process is simple and efficient. The extraction rate of litchi pericarp polysaccharides with antioxidant activities is high.

Key wordsLitchi pericarp polysaccharides; Ultrasonic extraction; Antioxidant activity

荔枝的果肉鲜美、味甜,并含有多种活性成分[1],深受人们喜爱。人们对荔枝果实进行利用时往往只保留果肉而将荔枝壳丢弃,因此产生大量荔枝壳废弃物,如果处理不当会进一步污染环境。荔枝壳虽然属于农作物废弃物,但壳内含多种功能成分,具多种保健功效。研究表明,荔枝壳含有多糖物质,具有抗氧化活性[2],对高血压、肿瘤等有良好的辅助疗效[3],潜在利用价值巨大。所以将荔枝壳进行开发利用已经成为荔枝深加工的趋势,其多糖的提取利用也成为研究热点之一。

目前对荔枝壳多糖的提取研究已有报道,比如采用传统水提法对荔枝壳多糖进行提取[4],但是该方法提取率较低,提取工艺还有待改进。还有研究表明,采用超声波提取荔枝果肉多糖效率较高[5],但在荔枝壳的提取中却极少报道。……

登录APP查看全文