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微波辅助提取葡萄皮中花色苷的动力学和热力学特性(英文) 被引量:9

Kinetics and thermodynamics characteristics of microwave assisted extraction of anthocyanins from grape peel
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摘要 为拓展微波辅助提取技术在食品工业领域的应用,研究了微波辅助技术对提取葡萄皮中花色苷的作用,并对其动力学和热力学进行了评价。结果表明:柠檬酸浓度、液料比、提取时间和微波功率可以显著影响总花色苷提取率。采用高浓度柠檬酸水溶液(1.00 mol/L)提取的总花色苷含量(172.99 mg/100 g)是低浓度柠檬酸水溶液(0.02 mol/L)提取的总花色苷含量(43.48 mg/100 g)的 4 倍。此外,在实验选取的动力学模型中,指数衰减模型可以更好的拟合提取动力学数据(R2>0.9875)。微波辅助提取葡萄皮中花色苷的有效扩散系数(2.12~4.87×10-11 m2/s)随着微波功率的增加而增大。微波辅助提取过程的热力学参数表明微波提取方式有利于传质过程。所得研究结果将为微波辅助提取技术的工业化应用提供理论依据。 为拓展微波辅助提取技术在食品工业领域的应用,研究了微波辅助技术对提取葡萄皮中花色苷的作用,并对其动力学和热力学进行了评价。结果表明:柠檬酸浓度、液料比、提取时间和微波功率可以显著影响总花色苷提取率。采用高浓度柠檬酸水溶液(1.00 mol/L)提取的总花色苷含量(172.99 mg/100 g)是低浓度柠檬酸水溶液(0.02 mol/L)提取的总花色苷含量(43.48 mg/100 g)的 4 倍。此外,在实验选取的动力学模型中,指数衰减模型可以更好的拟合提取动力学数据(R2>0.9875)。微波辅助提取葡萄皮中花色苷的有效扩散系数(2.12~4.87×10-11 m2/s)随着微波功率的增加而增大。微波辅助提取过程的热力学参数表明微波提取方式有利于传质过程。所得研究结果将为微波辅助提取技术的工业化应用提供理论依据。
出处 《农业工程学报》 EI CAS CSCD 北大核心 2012年第S1期326-332,共7页 Transactions of the Chinese Society of Agricultural Engineering
基金 Beijing Science and Technology Star Plan (No. 2007B072)
关键词 葡萄皮 花色苷 微波辅助提取 动力学 热力学 grape peel anthocyanins microwave assisted extraction(MAE) kinetics thermodynamics
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参考文献29

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