紫甘蓝色素提取工艺条件研究
毕业论文关键字： 紫甘蓝；色素；提取
Study on Extraction Technology of Purple Cabbage Pigment
Abstract: This design study was to extract pigment from purple cabbage, mainly to do a system study on purple cabbage pigment extraction, using different extraction methods: traditional water bath method, ultrasonic assisted extraction and microwave extraction by single factor and orthogonal experiments purple cabbage pigment to determine the best extraction conditions, and do a preliminary study of its stability. Got the best extractions of different method: optimal conditions for the traditional water bath of 25% ethanol as a solvent, pH2, 20:1 liquid to solid ratio, 40 ℃ water extraction five hours; ultrasonic assisted extraction method the optimum extraction conditions were 25% ethanol as a solvent, pH2, ultrasonic power 40W, 60 ℃ extraction 60min; microwave extraction optimum extraction conditions were 25% ethanol as a solvent, pH2, microwave power 540W extraction 2min. The latter two methods compared to the traditional water bath have the higher extraction efficiency.
Key Words：Purple Cabbage；Pigment；Extraction
目录
毕业设计(论文) 1
1 绪论 1
1.1 天然色素的简介 1
1.2 紫甘蓝及其色素的简介 1
1.3 紫甘蓝色素的提取方法 2
1.3.1溶剂萃取法 2
1.3.2 超声提取法 3
1.3.3 微波提取法 3
1.4 研究的目的与意义 3
2 材料与方法 5
2.1 实验材料 5
2.2 实验方法 6
2.2.1 传统水浴法提取紫甘蓝色素 6
2.2.2 超声波辅助提取紫甘蓝色素 8
2.2.3微波萃取紫甘蓝色素 9
2.2.4紫甘蓝色素提取的不同方法的比较实验 9
3 结果与分析 10
3.1 水浴法提取紫甘蓝色素 10
3.1.1 最佳提取溶剂的确定 10
3.1.2 最佳提取溶剂体积分数的确定 11
3.1.3最佳pH值的确定 11
3.1.4 最佳固液比的确定 12
3.1.5最佳提取温度的确定 13
3.1.6最佳提取时间的确定 13
3.1.7 传统水浴法提取紫甘蓝色素的正交实验的结果 14
3.2 超声波辅助法提取紫甘蓝色素 15
3.2.1最佳超声波提取时间的确定 15
3.2.2 最佳超声波提取温度的确定 16
3.2.3 最佳超声波提取功率的确定 16
3.2.4超声波辅助提取法提取紫甘蓝色素的正交实验的结果 17
3.3 微波萃取法提取紫甘蓝色素 18
3.3.1 最佳微波提取功率的确定 18
3.3.2最佳微波提取时间的确定 19
3.4 紫甘蓝色素不同提取方法的比较 19
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