17O NMR and Raman Spectroscopies of Green Tea Infusion with Nanomaterial to Investigate Their Properties. (4th December 2019)

• Record Type: Journal Article
• Authors: Zhou, Changyan; Zhang, Huiping; Yan, Ying; Zhang, Xinya
• Is Part Of: Journal of AOAC International. Volume 99:Number 5(2016)
• Page Start: 1377
• Page End: 1380
• Publication Date: 2019-12-04
• Subjects: Agricultural chemistry -- Periodicals; Food -- Analysis -- Periodicals; 543
• DOI: 10.5740/jaoacint.16-0128
• Languages: English
• ISSNs: 1060-3271

Abstract

Abstract: 17 O 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 17 O NMR and Raman spectroscopies. The 17 O 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 Ca 2+ 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.