【摘要】 为了充分利用农业废弃物苹果渣,进一步提高苹果渣中多酚物质的提取效率,采用二次通用旋转组合设计研究了苹果渣中苹果多酚的微波提取工艺。结果表明:乙醇用量对多酚得率有极显著影响,功率、乙醇浓度以及萃取时间和功率的交互项对多酚得率有显著影响,萃取时间对多酚得率无显著影响。最优工艺是:萃取时间60 s,功率750 W,乙醇浓度60%,乙醇用量25 mL(料液比1∶50),此条件下苹果多酚理论提取的得率为11.93 m g/g(DW)(验证值为11.41 m g/g),明显高于回流及超声波提取得率。更多还原

【Abstract】 In order to make full use of agricultural waste materials——apple pomace,and increase the extraction rate of apple polyphenols from apple pomace.Microwave extraction technique of apple(polyphenols) from apple(pomace) was studied by quadratic general spinnins design,the optimum conditions were determined.Results showed that the volume of ethanol had a very significant effect on the extraction rate of apple polyphenols.(Microwave) radiation,ethanol concentration and the interaction between extraction time and microwave radiation also had significant effects on the extraction rate.Extraction time had no significant effect on the extraction rate.The optimum conditions are extraction time 60 s,microwave radiation 750 W,ethanol concentration 60%,ethanol volume 25 mL(the ratio of material to liquid is 1∶50);the extraction rate of apple polyphenols is(11.93 mg/g(DW)) in theory(retest result is 11.41 mg/g),which is higher than that extraction methods of(refluxing) and ultrasonic.更多还原