食品科学 ›› 2011, Vol. 32 ›› Issue (8): 235-237.doi: 10.7506/spkx1002-6630-201108052

• 分析检测 • 上一篇    下一篇

藤茶中总黄酮的三波长紫外光谱法测定

周大寨1,朱玉昌1,王 进2   

  1. 1.生物资源保护与利用湖北省重点实验室 2.湖北民族学院生物科学与技术学院
  • 出版日期:2011-04-25 发布日期:2011-04-12
  • 基金资助:
    湖北省自然科学基金项目(2009CDA155);武汉市科技攻关项目(200920322147);湖北省教育厅B 类项目(B20101906)

Determination of Total Flavonoids in Ampelopsis grossedentata by Three-wavelength UV Spectrophotometry

ZHOU Da-zhai1,ZHU Yu-chang1,WANG Jin2   

  1. 1. Key Laboratory of Biologic Resources Protection and Utilization of Hubei Province, Enshi 445000, China; 2. School of Biological Science and Technology, Hubei Institute for Nationalities, Enshi 445000, China
  • Online:2011-04-25 Published:2011-04-12

摘要: 以乙醇为溶剂提取藤茶中总黄酮,用三氯化铝作为显色剂,采用三波长紫外光谱法进行定量。结果表明,黄酮质量浓度在0~40μg/mL内,分别在波长为λ1=322nm、λ2=311nm、λ3=296nm处测吸光度时,δA与质量浓度C之间呈良好的线性关系,回归方程为δA=0.0171C+0.0171,相关系数r=0.9978。方法的回收率为98.18%~102.79%,变异系数小于0.371%,具有良好的准确性和精密度。

关键词: 藤茶, 总黄酮, 三波长分光光度法

Abstract: A three-wavelength UV spectrophotometric method was proposed for the determination of total flavonoid content in Ampelopsis grossedentata. Samples were extracted with ethanol, and the extract was then detected colorimetrically with aluminum chloride as chromogenic agent at the wavelengths of 322, 311 nm and 296 nm. The regression equation of the proposed method was obtained as follows: δA = 0.0171C+0.0171, which exhibited good linearity in the range of 0 to 40μg/mL, with a correlation coefficient r of 0.9978. The spike recoveries at two spiked levels were between 98.18% and 102.79%, and the precision RSDs (n = 5) were less than or equal to 0.371%. Thus, this method is accurate and precise.

Key words: Ampelopsis grossedentata, flavonoids, three-wavelength UV spectrophotometry

中图分类号: