论文编号:SW050  论文字数:8925,页数:19

 摘 要：本论文介绍了桂花保鲜技术，桂花采收后容易变质，必须在当天立即进行保鲜。保鲜方法依桂花用途而异如用于提炼桂花浸膏，可将桂花浸泡在食盐和明矾的混合溶液中，再运至工厂用香料专用的有机溶剂浸提；用于酿制桂花酒的，可浸泡在食用酒精中等；用超临界 CO2 对桂花进行了萃取研究，考察萃取时间、温度、压力对浸膏得率和质量的影响，桂花萃取最佳工艺条件为：压力12～16MPa ，温度308～318K，时间2h，浸膏得率 0.43 %；并对桂花花渣中副产物黄酮的提取工艺进行了研究，采用乙醇提取法提取桂花副产物黄酮类化合物的最佳工艺条件，试验结果表明：乙醇提取法的最适工艺参数为浸提剂乙醇浓度80 %、浸提温度70℃、料液比1∶40、浸提时间3 h。
 
关键词：桂花；保鲜；CO2超临界流体萃取；黄酮类化合物

Osmanthus Extraction And By-products Extract Process Research

Abstract: This article introduced Osmanthus Fragrans preservation technology,the harvested Osmanthus Fragrans degenerate easily, we must immediately preservation in the day. Preservation methods vary is according to the use of Osmanthus Fragrans such as to extract Osmanthus extraction can be soaked in salt and Alum hybrid solution, then shipped to the factory,which use exclusive spices of organic solvent to extract extraction. Osmanthus f ragrans were extracted with supercritical CO2 at different conditions of pressure , temperature and contact time to influence the yield and quality. The yield of Osmanthus concrete was 0.43 % at better conditions of pressure range 12～16MPa ,temperature range 308～318 K and contact time2h . Waste Osmanthus by-product flavonoids and the extraction process carried out a study on the use of ethanol extraction from yellow osmanthus in the optimum conditions. The results show that: ethanol extraction of optimum process parameters for the extraction is 80% ethanol concentration, extraction temperature is 70 ℃, liquid than 1:40, the extraction time 3 h.

Keywords： Osmanthus fragrans； Preservation；CO2 supercritical fluid extraction；Flavonoids

目  录
中文摘要 I
英文摘要 II
目录 III
1. 绪论 1
 1.1前言 1
 1.2实验概述 1
2. 实验部分 5
 2.1桂花的保鲜技术  5
 2.2桂花超临界CO2提取浸膏工艺 5
 2.3桂花花渣黄酮副产物提取技术 7
3. 结果与讨论 8
 3.1桂花的保鲜技术的结果    8
 3.2桂花超临界CO2提取浸膏结果与讨论 8
 3.3桂花花渣黄酮副产物提取结果 12
4．总结与展望 13
致谢 14
参考文献 15

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