17O NMR and Raman Spectroscopies of Green Tea Infusion with Nanomaterial to Investigate Their Properties
Author:
Zhou Changyan1,
Zhang Huiping1,
Yan Ying1,
Zhang Xinya1
Affiliation:
1. South China University of Technology, School of Chemistry and Chemical Engineering, Guangzhou 510640, Guangdong, China
Abstract
Abstract
17O NMR and Raman spectrograms of green tea infusions with nanomaterial were investigated. Different green tea infusions were prepared by steeping tea powder with different concentrations of nanomaterial aqueous solution. The tea infusions were tested with 17O NMR and Raman spectroscopies. The 17O NMR results showed that line width increased to 90 in the tea infusions after nanomaterial was added as a result of the effects of the self-association of Ca2+ and tea polyphenol. The results of Raman spectroscopy showed that, in tea infusions, the enhancement of C─C and C─O stretching vibrations suggest an increase in the number of effective components in water.
Publisher
Oxford University Press (OUP)
Subject
Pharmacology,Agronomy and Crop Science,Environmental Chemistry,Food Science,Analytical Chemistry