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响应面法优化回流提取紫薯花青素工艺

DOI: 10.13560/j.cnki.biotech.bull.1985.2014.12.016, PP. 97-104

Keywords: 紫薯,花青素,回流提取,中心组合设计,响应面分析

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Abstract:

旨在获得紫薯花青素的最佳提取工艺,采用中心组合(Box-Behnken)试验设计及响应面分析相结合的方法,对紫薯花青素的回流提取工艺进行优化。单因素试验结果显示,最佳乙醇体积浓度为75%、提取温度为60℃、提取时间为60min、液料比为7∶1,在此基础上,利用中心组合(Box-Behnken)试验设计及响应面分析法进行回归分析,获得最优工艺参数为:乙醇体积浓度74%、提取温度66℃、提取时间56min、液料比8∶1。在优化后的条件下进行验证试验,得到紫薯花青素的提取率为4.64mg/g,与理论值(4.68mg/g)相比,相对误差较小,为0.85%。研究表明,采用响应面法分析优化紫薯花青素的水浴回流提取工艺参数准确可靠,可应用于紫薯花青素的提取生产。

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