摘要以柚子果皮为原材料，采用水蒸气蒸馏装置，利用水蒸气蒸馏法提取柚皮精油，考察各种如颗粒度大小、蒸馏时间的长短、反应温度的高低、液料比大小、样品是否前处理等等影响因素对精油的产量的影响。通过这一系列实验得出了液料比20:1的比例，颗粒度大小为5mm*5mm，蒸馏时间长度为60min-70min，蒸馏所需温度为180°C，在进行超声和盐析的前处理后的柚皮精油的产量最高。在此优化条件提取制备一定具有抗氧化性能的柚皮精油产品，通过GC-MS初步研究柚子皮精油的组成成分，鉴定出了约34种化合成分物，其中的主要成分为D-柠檬烯，其含量占比为57.87%，β-月桂烯含量占比为11.95%。并分别采用了DPPH和ABTS的抗氧化实验对精油的抗氧化性进行了考察。推测分析可得柚皮精油呈现出的清除能力不太强。67322

毕业论文关键词：水蒸气蒸馏法，柚皮优化工艺，气相和GC-MS，抗氧化性

Abstract We use the Grapefruit peel as raw material, The effects of various factors such as size, distillation time, distillation temperature, liquid ratio, sample pretreatment and so on were studied by using steam distillation method, and the effects of various factors such as size, distillation time, The effect of oil. The yield of essential oil of Grapefruit peel was the highest when the ratio of liquid to material was 20: 1, the particle size was 5mm * 5mm, the distillation time was 60min, the distillation temperature was 180 ℃, and the pretreatment of ultrasonic and salting out was carried out. In this paper, the essential oils of pomelo peel oil with antioxidant properties were prepared and the contents of essential oil in grapefruit peel were studied by GC-MS. 34 kinds of chemical compounds were identified, and the main components were D-limonene content Was 57.87%, and the proportion of β-myrcene was 11.95%. And antioxidant system of DPPH and ABTS were used to study the antioxidant properties of essential oil. According to the datas show that Grapefruit peel’s oil essential antioxidant capacity is not strong.

Key words: steam distillation, Grapefruit optimization process, GC-MS, oxidation resistance

目录

1绪论 1

1.1文献综述 1

1.1.1柚皮精油的概述 1

1.1.2柚皮精油的应用与合成香料 2

1.1.3柚皮精油的提取 2

1.1.4柚皮精油提取的最优化工艺条件 3

1.1.5气质联用分析法 4

1.1.6精油的抗氧化性能研究 5

1.1.7检测精油的抗氧化性 6

1.2选题意义 6

1.3实验方案 7

2 实验设备与试剂 8

2.1实验设备 8

2.2实验试剂 8

2.3试剂配制 8

2.3.1 DPPH溶液的配制 8

2.3.2 ABTS溶液的配制 8

3 实验内容 9

3.1柚皮精油提取 9

3.2柚皮精油提取优化工艺条件的研究[ 9

3.2.1液料比对提取效果的影响 9

3.2.2 温度对提取效果的影响 9

3.2.3蒸馏时间对提取效果的影响