食品科学 ›› 2005, Vol. 26 ›› Issue (3): 209-211.

• 分析检测 • 上一篇    下一篇

分光光度法校正测定大豆异黄酮总含量

 孙玲, 魏振承, 张名位   

  1. 广东省农业科学院农业部功能食品重点实验室
  • 出版日期:2005-03-15 发布日期:2011-09-19

Determining Isoflavones by the Emendation Method in Ultraviolet Spectrophotometry

 SUN  Ling, WEI  Zhen-Cheng, ZHANG  Ming-Wei   

  1. Guangdong Academy of Aricultural Science, Key Lab of Functional Food of Agricultural Ministry of China
  • Online:2005-03-15 Published:2011-09-19

摘要: 以染料木素(Genistein)为标准样品,用分光光度法测定了Genistein和大豆苷原(Daidzein)混合标准溶液的异黄酮总浓度。结果表明:混合物中不同种类异黄酮含量的比例严重影响着测定的精确度(测定值/实际值);回归分析显示测定精确度与混合溶液在262nm和250nm处的光吸收值之比呈显著线性相关,通过该相关性可校正计算混合溶液异黄酮测定值,加样回收试验表明校正前后的平均回收率分别为91.8%和 97.3%。

关键词: 大豆, 异黄酮, 紫外分光光度, 测定

Abstract: Based on genistein as reference standard, the isoflavones content of standard mixture of genistein and daidzein was determined by ultraviolet spectrophotometry. The results showed that determination precision (determined value /standard value) was affected by the ratio of genistein and daidzein in the mixture, and the linear correlation existed between determination precision and A262/A250 absorbance, which could be used as a method to emendate the determined value. The average recovery rate by the method of pre-emendation and emendation was 91.8% and 97.3% respectively.

Key words: soybean, isoflavones, ultraviolet spectrophotometry, determination