【摘 要】
：
为了延长葡萄柚精油的货架期,增强其赋香性能,该文以分子蒸馏技术去除葡萄柚原油中的部分柠檬烯,制备高浓缩精油.以蒸馏温度和压力为影响因子,以馏出物中的柠檬烯、馏余浓缩精油中的柠檬烯、芳樟醇及癸醛含量为响应值,在单因素试验的基础上,设计中心组合试验,对分子蒸馏工艺进行响应面优化.结果表明,蒸馏温度和压力对馏余浓缩精油中的柠檬烯、芳樟醇及癸醛含量均有明显影响,响应面模型优化的蒸馏温度为45.83℃、压力
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为了延长葡萄柚精油的货架期,增强其赋香性能,该文以分子蒸馏技术去除葡萄柚原油中的部分柠檬烯,制备高浓缩精油.以蒸馏温度和压力为影响因子,以馏出物中的柠檬烯、馏余浓缩精油中的柠檬烯、芳樟醇及癸醛含量为响应值,在单因素试验的基础上,设计中心组合试验,对分子蒸馏工艺进行响应面优化.结果表明,蒸馏温度和压力对馏余浓缩精油中的柠檬烯、芳樟醇及癸醛含量均有明显影响,响应面模型优化的蒸馏温度为45.83℃、压力为500 Pa,馏出物中的柠檬烯、馏余浓缩精油中的柠檬烯、芳樟醇及癸醛的预测质量分数分别为94.84％、46.82％、1.52％和2.36％,实测质量分数分别为94.95％、46.62％、1.57％和2.35％,与预测含量基本吻合.浓缩后的产品呈棕褐色,香气更加醇厚、柔润,含氧化合物的总质量分数由原油中的3.41％上升到29.31％,实现了8.6倍浓缩.该研究可为其他柑橘类精油的精制浓缩提供参考.
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