食品科学 ›› 2010, Vol. 31 ›› Issue (24): 341-344.doi: 10.7506/spkx1002-6630-201024075

• 分析检测 • 上一篇    下一篇

小米中VB2的提取方法研究及其含量的测定

董永刚1,王 玲2,*,刘立丹2,李 庆1   

  1. 1.河北农业大学食品科技学院 2.河北农业大学理学院
  • 收稿日期:2010-03-05 出版日期:2010-12-25 发布日期:2010-12-29
  • 通讯作者: 王 玲2 E-mail:wanglinghbnd@163.com

Extraction and Determination of Vitamin B2 in Millet

DONG Yong-gang1,WANG Ling2,*,LIU Li-dan2,LI Qing1   

  1. 1. College of Food Science, Agricultural University of Hebei, Baoding 071001, China;
    2. College of Science, Agricultural University of Hebei, Baoding 071001, China
  • Received:2010-03-05 Online:2010-12-25 Published:2010-12-29
  • Contact: WANG Ling2 E-mail:wanglinghbnd@163.com

摘要:

通过单因素试验和正交试验分析研究不同提取液、提取方法和提取条件对小米中VB2 提取效果的影响。采用荧光分析法,在激发波长λex=471.0nm 和发射波长λem=528.0nm 时,测定小米中VB2 的含量。结果表明:选取H3PO4 溶液为提取液,用水浴回流法,提取液浓度0.1mol/L、提取时间45min、提取液pH5.0 时,提取效果最佳,且回收率可达到89.20%~100.32%,变异系数可控制在1.21% 内。实验精密度和准确度良好,可快速、准确的测定小米中VB2 含量。

关键词: 小米, VB2, 正交试验, 荧光分光光度法

Abstract:

Effect of the extraction method, solvent, solvent concentration, pH and time on the yield of vitamin B2 in the millet was studied through single factor test and orthogonal design test. Vitamin B2 content was determined by fluorophotometric method with excitation and emission wavelength at 471.0 nm and 528.0 nm, respectively. In the optimum extraction conditions, millet was extracted with 0.1 mol/L of aqueous H3PO4 at pH 5.0 for 45 min in a water bath backflow. Under such conditions, the recovery of VB2 was from 89.20% to 100.32%, with the coefficient of variation 1.21%.

Key words: millet, vitamin B2(VB2), orthogonal experiment, fluorophotometry

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