The optimization of extracting total polyphenols from clove based on the simultaneous ultrasonic-microwave assisted extraction (UMAE) and the analysis for its high efficiency
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摘要: 采用超声-微波协同技术对丁香总多酚提取工艺进行了优化,通过比较和扫描电镜分析初步解析这种技术高效提取的原因。结果表明,丁香总多酚超声-微波协同提取最佳工艺条件为:提取时间12min、微波功率75W、超声功率50W、料液比1∶30和乙醇浓度50%。对比分析发现,超声-微波协同对丁香总多酚的提取效率显著高于单独微波辅助提取和超声辅助提取(p<0.01)。扫描电镜分析发现,协同提取对原料细胞结构破坏更严重、作用更充分。Abstract: The simultaneous ultrasonic / microwave assisted extraction ( UMAE) technology of extracting total polyphenols from clove was optimized and the reason for high-efficiency of this method was analyzed through comparison analysis and scanning electron microscope. The results showed that the optimal parameters of the UMAE technology were as follows, the extracting time was 12 min, the microwave power was 75 W, the ultrasonic power was 50 W, the ratio of sample to extracting solution was 1 ∶30 (g∶m L) , and the concentration of ethanol was 50%. The comparative study showed that the extraction ratio of total polyphenols from clove by UMAE was significantly higher than those of microwave assisted extraction (MAE) and ultrasound assisted extraction (UAE) (p <0.01) . A comparison of scanning electron microscopy on clove powders indicated the higher extraction efficiency of UMAE results from the more serious disruption of cell structure and the more sufficient interaction.
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