食品科学 ›› 2011, Vol. 32 ›› Issue (9): 68-71.doi: 10.7506/spkx1002-6630-201109015

• 基础研究 • 上一篇    下一篇

淀粉结晶度计算的新方法

陈翠兰,张本山,陈福泉   

  1. 华南理工大学轻工与食品学院
  • 出版日期:2011-05-15 发布日期:2011-04-11
  • 基金资助:
    “十一五”国家科技支撑计划项目(2006BAD27B04); 广东省科技厅科技计划项目(2008A08040300;2008A08040301)

A Novel Method for Calculating Starch Crystallinity

CHEN Cui-lan,ZHANG Ben-shan,CHEN Fu-quan   

  1. College of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510640, China
  • Online:2011-05-15 Published:2011-04-11

摘要: 分析X射线衍射仪的不同衍射角范围、步长及扫描速率等测试因素对淀粉的X射线衍射图谱的影响;使用MDI Jade 软件采用两种方法实现淀粉结晶度的计算。结果表明:当设置衍射角范围为4~60°,步长为0.02°,扫描速率为10°/min时,分析测试结果较好;测试衍射角范围取4~30°之间时,计算结晶度的主观性因素影响相对减小,可快速、简便、可靠的计算结晶度大小,测得玉米、马铃薯、木薯淀粉相对结晶度分别为26.7%、18.4%和26.5%。

关键词: 淀粉, 结晶度, MDI Jade 软件, 计算

Abstract: In this work, we study the effect of some instrumental parameters such as diffraction angle, step-length and scanning rate on the X-ray diffraction (XRD) analysis of starch. Meanwhile, the calculation of starch crystallinity was achieved using MDI Jade software by two different methods. Under the following conditions: diffraction angle of 4° to 60°, step-length of 0.02°and scanning rate of 10°/ min, satisfying test results were attained. The subjective factors affecting the calculation of starch crystallinit could be attenuated by selecting a diffraction angle between 4° and 30°. As a result, the calculation of starch crystallinity will be characterized by simplicity, rapidity and reliability. The relative starch crystallinity of corn, potato, and cassava was determined as 26.7%, 18.4% and 26.5%, respectively.

Key words: starch, crystallinity, MDI Jade software, calculation, novel method

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