食品科学 ›› 2010, Vol. 31 ›› Issue (22): 301-305.doi: 10.7506/spkx1002-6630-201022065

• 分析检测 • 上一篇    下一篇

荧光分光光度计测定保健食品总抗氧化能力

赵 建,刘 璇,文 镜*   

  1. 北京联合大学 生物活性物质与功能食品北京市重点实验室
  • 收稿日期:2010-03-10 修回日期:2010-08-07 出版日期:2010-11-25 发布日期:2010-12-29
  • 通讯作者: 文镜 E-mail:wenjing@ygi.edu.cn
  • 基金资助:

    北京市教委科技发展计划项目(KM201011417006)

Total Antioxidant Capacity Determination of Health Food by Fluorescence Spectrophotometer

ZHAO Jian,LIU Xuan,WEN Jing*   

  1. Beijing Key Laboratory of Bioactive Substances and Functional Foods, Beijing Union University, Beijing 100191, C
  • Received:2010-03-10 Revised:2010-08-07 Online:2010-11-25 Published:2010-12-29
  • Contact: WEN Jing E-mail:wenjing@ygi.edu.cn

摘要:

目的:建立用荧光分光光度计测定总抗氧化能力的方法。方法:以2,2'- 偶氮二(2- 脒基丙烷)二盐酸盐(AAPH)作为过氧自由基来源,sodium fluorescein(FL)为荧光指示剂,水溶性VE(trolox)为定量标准,荧光值半数衰减时间作为观察指标,测定6 种保健食品的总抗氧化能力。结果:方法的最低检测限为0.22μmol/L,线性回归方程Y=25.432X+2.0625,R2=0.9949,平行性精密度(RSD)3.5%,重复性精密度(RSD)3.9%,加标回收率在90%~104% 之间。结论:用荧光分光光度计可以测定保健食品总抗氧化能力。

关键词: 食品检测, 总抗氧化能力, 荧光分光光度法

Abstract:

Objective: To establish a determination method of total antioxidant capacity by fluorescence spectrophotometer. Methods: Total antioxidant capacity of health food were determined by a fluorescence method using AAPH as the source of peroxy free radicals, sodium fluorescein (FL) as the fluorescent indicator, water-soluble vitamin E (Trolox) as the quantitative standard and half fluorescence decay time as the observation index. Results: This established method had the detection limit of 0.22 μmol/L, linear regression equation of Y = 25.432X + 2.0625 with a coefficient constant of 0.9949, parallel precision of 3.5% and repeatability precision of 3.9%. The recovery rates of spiked samples were in the range of 90%-104% through the determination of six health food samples. Conclusion: Fluorescence spectrophotometer can be used for total antioxidant capacity of health food.

Key words: food test, total antioxidant capacity, fluorescence spectrophotoscopy

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