Development of methodology for identification the nature of the polyphenolic extracts by FTIR associated with multivariate analysis.

Abstract

Tannins are polyphenolic compounds of complex structures formed by secondary metabolism in several plants. These polyphenolic compounds have different applications, such as drugs, anti-corrosion agents, flocculants, and tanning agents. This study analyses six different type of polyphenolic extracts by Fourier transform infrared spectroscopy (FTIR) combined with multivariate analysis. Through both principal component analysis (PCA) and hierarchical cluster analysis (HCA), we observed well-defined separation between condensed (quebracho and black wattle) and hydrolysable (valonea, chestnut, myrobalan, and tara) tannins. For hydrolysable tannins, it was also possible to observe the formation of two different subgroups between samples of chestnut and valonea and between samples of tara and myrobalan. Among all samples analysed, the chestnut and valonea showed the greatest similarity, indicating that these extracts contain equivalent chemical compositions and structure and, therefore, similar properties.

DOI: 10.1016/j.saa.2015.08.020

Cite this paper

@article{Grasel2016DevelopmentOM, title={Development of methodology for identification the nature of the polyphenolic extracts by FTIR associated with multivariate analysis.}, author={F{\'a}bio dos Santos Grasel and Marco Fl{\^o}res Ferr{\~a}o and Carlos Rodolfo Wolf}, journal={Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy}, year={2016}, volume={153}, pages={94-101} }