食品科学 ›› 2013, Vol. 34 ›› Issue (8): 31-35.doi: 10.7506/spkx1002-6630-201308007

• 工艺技术 • 上一篇    下一篇

Folin-Ciocalteu法测定苹果醋饮料的总多酚含量

赵晓娟,李敏仪,黄桂颖,陈悦娇   

  1. 仲恺农业工程学院轻工食品学院,广东 广州 510225
  • 收稿日期:2012-02-05 修回日期:2013-02-23 出版日期:2013-04-25 发布日期:2013-05-07
  • 通讯作者: 赵晓娟 E-mail:xiao0692@163.com
  • 基金资助:
    国家自然科学基金青年科学基金项目;仲恺农业工程学院科研基金项目

Determination of Total Polyphenols in Apple Vinegar Drink by Folin-Ciocalteu Method

ZHAO Xiao-juan,LI Min-yi,HUANG Gui-ying,CHEN Yue-jiao   

  1. College of Light Industry and Food Science, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China
  • Received:2012-02-05 Revised:2013-02-23 Online:2013-04-25 Published:2013-05-07

摘要: 研究Folin-Ciocalteu法测定苹果醋饮料中总多酚含量的最适测定条件,并对该方法进行了分析评价。结果表明多酚含量的最佳测定条件为:样品用量1.0mL、福林-酚试剂2.5mL、12%碳酸钠溶液4.0mL、反应温度45℃、反应时间1.5h、测定波长756nm。吸光度与多酚含量在0~6μg/mL范围内呈良好的线性关系(y=0.1238x+0.0098,R2=0.9992),方法的加标回收率为101.2%,相对标准偏差为2.8%(n=5)。该方法精密度高、稳定性好,适用于苹果醋饮料中总多酚含量的测定。

关键词: Folin-Ciocalteu, 分光光度法, 苹果醋, 多酚

Abstract: The optimum condition on determining total polyphenols content in apple vinegar drink by Folin-Ciocalteu method was studied. The results indicated that the optimum conditions for total polyphenols determination by Folin-Ciocalteu were as follows: 2.5 mL of Folinphenol reagent was added in 1.0 mL of sample, and then 4.0 mL of 12% sodium carbonate solution was added. After the coloration reaction was for 1.5 h at 45 ℃, the optical density was measured at 756 nm. Under the optimum conditions, the absorbance increased linearly with the concentration of gallic acid in the range of 0 to 6 μg/mL (y=0.1238x+0.0098, R2=0.9992). The average spiked recovery rate was 101.2% with the relative standard deviations of 2.8% (n=5). The method is highly precise and stable, and suitable for determining total polyphenol content in apple vinegar drink.

Key words: Folin-Ciocalteu, spectrophotometry, apple vinegar, polyphenol

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