《陕北红枣精油提取工艺》-毕业论文（设计）.docVIP

精品 精品 分类号 单位代码 密 级 学 号 学生毕业设计（论文） 题 目 陕北红枣精油提取工艺 作 者 院 (系) 化学与化工学院 专 业 化 学 指导教师 答辩日期 年 月 日 摘 要 本论文采用实验的方法，以红枣皮肉为原料，研究了红枣精油的提取工艺，采用超声辅助提取法对红枣精油进行提取，然后对红枣溶液进行水蒸气蒸馏提取，再将冷却好的红枣溶液抽滤，最后将得到的滤液用乙醚（利用了乙醚的低沸点这一特征，这使得乙醚和红枣精油能够更好的分离）萃取，进一步对乙醚进行真空旋转蒸发，得到红枣精油。通过不同的料液比确定出最佳的料液比，通过不同的超声波辅助提取时间，温度比较确定出最佳的浸提时间，温度。通过不同时间的水蒸气蒸馏提取确定出最佳的水蒸气蒸馏提取时间。通过不同的pH值料液确定出最佳的pH值料液。并对提取方法进行单因素和正交实验以优化提取工艺。最后得出超声波辅助提取红枣精油的优化工艺：料液比为1︰8.5，提取时间为20min，温度为35℃。水蒸气蒸馏提取时间为2h。pH值为7。以最佳的红枣精油工艺提取精油。最后得到红枣精油的提取率为2.575%。 红枣自古以来就是我国人民常吃的保健食物之一，枣果具有很高的营养与药用保健功效，红枣精油是一种珍贵的制剂，具有较高的保健和药用价值，有增强睡眠、提高机体免疫能力、抗肿瘤、镇咳、祛痰作用。具有令人喜爱的独特芳香味、是糖果、饮料，化妆品等的重要赋香剂、调味剂。因此，它在食品医药保健品化妆品中具有宽广的应用前景 关键词：红枣；精油；超声波辅助提取 论文类型：实验研究 精品 精品 ABSTRACT Red jujube is one of the health food that our people often eat from ancient times, date fruit has very high nutrition and medicinal health care efficacy, it is a natural edible food. Red jujube rich in glucose, sucrose, rich VA, VB2, VC, VE, VP and calcium, phosphorus, iron and other nutrients and selenium, including 36 kinds of trace elements, rich in protein and other nutrients, which is also good Chinese traditional medicine. Red jujube essence oil is a kind of special cells of the red jujube fragrance,,room temperature can be volatile oil, the floorboard of the liquid, which is a kind of precious preparations, also have higher health care and medicinal value, strengthen the bodys immune sleep, improve ability, antitumor, antitussive, expectorative effect,.it have a favorite unique fragrant taste, which is candy, beverage, cosmetics’s important fu sweet agent and sauce. Therefore,it in food , medicine ,health products and cosmetics with broad application prospect. This paper adopts experiment method, red jujube juice to flesh as raw materials, red jujube essential oil extraction technology, using ultrasonic extraction auxiliary on red es