【摘要】 以信阳杂交大米为原料,采用温水浸出抽提法分离纯化制取大米直链淀粉。以直链淀粉的提取率及含量为评价指标,通过对影响大米直链淀粉提取的淀粉乳浆质量分数、抽提温度及抽提时间等因素进行单因素试验和正交试验,优化其生产工艺技术。结果表明,最佳提取工艺条件为淀粉乳浆质量分数4%,抽提温度80℃,抽提时间25 min,在此条件下得到的大米直链淀粉的含量在97%以上,提取率17.47%。该方法提取直链淀粉纯度高、成本低,为进一步开展大米直链淀粉的研究提供了基础数据。更多还原

【Abstract】 Using Xinyang hybrid rice as raw material,the rice amylose was separated and purified by warm water leaching extraction method. With the extraction rate of amylose as the evaluation index,the concentration of starch milk,extraction temperature and extraction time were studied by single factor test and orthogonal test,the technology of preparing rice amylose by warm water extraction method was optimized. The optimum extraction conditions were determined as follows:starch concentration 4%,extraction temperature 80 ℃,extraction time 25 min. Under the optimum conditions,the content of rice amylose over 97%,and the extraction yield 17.47%. This method had high purity and low cost,which provided basic data for further research on rice amylose.更多还原