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Studies on the Green Fluorescence of Tea Polyphenols

  • ZHANG Li-xia ,
  • JIA Ming ,
  • XIA Wen-juan ,
  • XIANG Qin-zeng ,
  • HUANG Xiao-qin
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  • College of Horticulture Science and Engineering, Shandong Agricultural University, Tai’an 271018, China

Online published: 2019-09-16

Abstract

The effects of the concentration , pH, solvent, mental ion ( Ca2+ , Al3+ ) and heating on the fluorescence spectra of the tea polyphenols were studied. The results showed that the factors of all above had obviously effects on the fluorescent intensity of tea polyphenols. It reached the maximum intensity when pH of solvent is 7.4±0.2 or the concentration of tea polyphenols is 3βmg/ml or water solution contains 50% ethanol. Adding Ca2+ and Al3+ in the infusion of tea polyphenols reduced the fluorescent intensity, but it was mainly indirect effect by precipitating a portion of tea polyphenols. Heating treatment caused the fluorescent intensity of tea polyphenols higher. .The maximum emission peak would move to long wavelength when the concentration of tea polyphenols was above 3βmg/ml or pH>8, but other factors had less effects. Besides, solvent polarity affected the shape of excitation fluorescent spectra and the intensity obviously, but had less effect on the maximum emission wavelength.

Cite this article

ZHANG Li-xia , JIA Ming , XIA Wen-juan , XIANG Qin-zeng , HUANG Xiao-qin . Studies on the Green Fluorescence of Tea Polyphenols[J]. Journal of Tea Science, 2004 , 24(4) : 288 -294 . DOI: 10.13305/j.cnki.jts.2004.04.012

References

[1] 张正奇主编. 分析化学[M]. 北京: 科学出版社, 2002.
[2] 张剑荣, 戚苓, 方惠群. 仪器分析实验[M]. 北京: 科学出版社, 1999.
[3] D.A.斯科特, D.M.韦斯特. 仪器分析原理(上册)[M]. 上海: 上海科学技术出版社, 1982.
[4] 余琳, 黄春霞. 槲皮素-铝(Ⅲ)-Tween-80荧光体系的研究及其应用[J]. 广东工业大学学报, 2001, 18(2):81~84.
[5] 姚本林, 时小波. 槲皮素铝的络合反应及槲皮素的荧光光度法测定[J]. 理化检验-化学分册, 2002, 38(4): 186~187.
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