微波辅助提取苹果皮中的多酚类物质

以苹果皮为原料提取苹果多酚,对不同提取剂的提取效果进行了比较;通过单因子试验和正交试验对微波辅助提取多酚的工艺条件进行了探讨,研究了溶剂浓度、微波功率、微波处理时间以及料液比对多酚提取的影响;并对微波辅助提取和常规法提取的效果进行了比较。结果表明：综合考虑提取效果及食品安全性,选择乙醇作为提取剂为宜;微波辅助提取的最佳工艺条件为乙醇浓度70%、微波功率210W、微波时间25s、料液比（w/v）1∶5;微波辅助提取法提取物中原花色素含量0.3668mg/ml,常规法提取物中原花色素含量0.2552mg/ml,微波辅助提取效果优于常规法提取。

Microwave radiation extraction of polyphenols from apple peel

The extraction of apple-polyphenols from apple peel was studied. The extraction effects of different solvents were compared,and the technological conditions of microwave radiation extraction of polyphenols were investigated by the single factor and orthogonal experiments. The influence of solvent concentration,microwave power,microwave treatment time and solid-to-liquid ratio on the extraction was studied,and comparison was made between conventional extraction and microwave radiation extraction. The results indicated that alcohol was the appropriate solvent if extraction effect and food safety were taken into consideration. The optimum technological conditions of microwave radiation extraction were determined as follows: alcohol concentration 70%,microwave power 210W,microwave extraction time 25s and solid-to-liquid ratio 1 : 5. The content of proanthocyanidin was 0.3668 mg/ml with microwave radiation extraction, and 0.2552 mg/ml with the conventional method, which showed that the former was superior to the latter.