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茶叶科学 ›› 2008, Vol. 28 ›› Issue (2): 101-106.doi: 10.13305/j.cnki.jts.2008.02.006

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Folin-Ciocalteu比色法测定苦丁茶中多酚含量

刘丽香1, Tanguy Laura1,2, 梁兴飞1, 孙怡1, 叶红1, 曾晓雄1,*   

  1. 1. 南京农业大学食品科技学院,江苏 南京 210095;
    2. Department of Food Engineering, Polytech’Lille, 59655 Villenevve d’Asqc, France
  • 收稿日期:2007-07-25 修回日期:2007-12-07 出版日期:2008-04-15 发布日期:2019-09-16
  • 通讯作者: * zengxx@njau.edu.cn
  • 作者简介:刘丽香(1983— ),女,江苏徐州人,硕士研究生,从事食品生物技术研究。
  • 基金资助:
    国家高技术研究发展计划(2007AA10Z351)和南京农业大学高层次人才引进基金(804066)

Determination of the Total Content of Polyphenols in Kudincha by Folin-Ciocalteu Colorimetry

LIU Li-xiang1, Tanguy Laura1,2, LIANG Xing-fei1, SUN Yi1, YE Hong1, ZENG Xiao-xiong1,*   

  1. 1. College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China;
    2. Department of Food Engineering, Polytech’Lille, 59655 Villenevve d’Asqc, France
  • Received:2007-07-25 Revised:2007-12-07 Online:2008-04-15 Published:2019-09-16

摘要: 以绿原酸为标准品,研究了Folin-Ciocalteu比色法测定苦丁茶中多酚含量的适宜条件。结果表明,苦丁茶提取液在Folin-Ciocalteu试剂3.0 ml、饱和Na2CO3溶液4.5 ml、反应温度30℃、反应时间30 min的条件下,测定其747 nm处的吸光值,多酚浓度在20.0~100.0 mg/L范围内与吸光值呈良好的线性关系;稳定性、精密度、重现性和回收率实验的相对标准偏差为0.887%~1.416%;与酒石酸亚铁比色法的测定结果无显著差异。该法是一种简便、快速、准确测定苦丁茶多酚含量的可靠方法。

关键词: 苦丁茶, 多酚, Folin-Ciocalteu比色法

Abstract: A quantitative method for the determination of the total content of polyphenols in kudincha was studied by using FC method (Folin-Ciocalteu colorimetry ) with chlorogenic acid as standard. The results showed that the total polyphenol contents of kudincha could be well calculated according to their colorimetric absorption at 747 nm by applying Folin-Ciocalteu reagent 3.0 ml and saturated Na2CO3 4.5 ml at 30℃ for 30 min, and the linear range of standard curve was 20.0~100.0 mg/L. Stability, precision, repetition and recovery rate were in the range of 0.887%~1.416% by RSD (relative standard deviation). There are not any differences for the results obtained by FC method and ferrous tartrate colourimetry. Therefore, FC method is convenient, fast, and accurate to determine the total polyphenols of kudincha.

Key words: kudincha, polyphenol, Folin-Ciocalteu colorimetry

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