【摘要】 以兴安落叶松(LarixgmeliniiRupr.)木材的加工剩余物为原料,利用微波效应,以水为溶剂来提取其中的阿拉伯半乳聚糖。通过实验设计考察了微波提取的条件即微波功率、作用时间、木粉粒度、料液比等因素对提取物产率的影响,从而确定较佳的提取工艺:微波功率为490W,作用时间为25min,料液比为1∶35,木粉粒度为0.20～0.30mm。微波提取法提取物产率可以达到17.47%。并在此基础上将微波提取方法与传统提取方法进行分析比较得出:微波提取法的提取率比传统水浴提取法的提取率高出1.6%,在所用时间上仅用了1/12,同时利用红外光谱对提取物进行了分析。更多还原

【Abstract】 Arabogalactan was extracted from wood flour of Larix gmelinii Rubr.with water under microwave radiation.Effects of microwave power,extraction time,wood flour particle size and ratio of solid to liquid on the yield were investigated.Optimum extraction parameters were obtained as follows:490 W microwave power,25 min,1∶35 ratio of solid to liquid(by mass),0.20-0.30 mm wood flour particle size.Under these conditions,the extraction yield was 17.47%,which was 1.6% higher than that from the traditional water bath extraction.Extraction time by the new method was just 1/12 of that by the traditional method.FTIR spectra analysis indicated that structural characteristics of the extractives obtained under microwave radiation were almost identical to those from the traditional method.更多还原