EXTRACTION, QUANTIFICATION, AND FTIR CHARACTERIZATION OF BARK TANNINS OF FOUR FOREST SPECIES GROWN IN NORTHEAST BRAZIL

Authors

  • Sarah Rebeka Rodrigues Marques Universidade Federal do Rio Grande do Norte, Programa de Pós-Graduação em Ciências Florestais , Macaíba, RN - Brasil
  • Tatiane Kelly Barbosa Azevêdo Universidade Federal do Rio Grande do Norte, Departamento de Engenharia Florestal, Macaíba, RN - Brasil
  • Aline Rogéria Freire de Castilho Universidade Estadual de Campinas,Departamento de Odontologia, Piracicaba, SP - Brasil
  • Renata Martins Braga Universidade Federal do Rio Grande do Norte, Departamento de Engenharia Florestal, Macaíba, RN - Brasil
  • Alexandre Santos Pimenta Universidade Federal do Rio Grande do Norte, Departamento de Engenharia Florestal, Macaíba, RN - Brasil

Keywords:

Forest species bark, Proanthocyanidins, Prodelphinidins

Abstract

Condensed tannins are chemical compounds derived from the secondary metabolism of plants. They are of particular interest due to their broad range of technological uses and applications. The objective of this study was to extract, quantify, and characterize by Fourier-transform infrared spectroscopy (FTIR) the bark tannins of four forest species grown in Northeast Brazil: Acacia mangium, Azadirachta indica, Mimosa tenuiflora, and Mimosa caesalpiniifolia. Bark samples were collected from 5 trees of each species grown in a five-year-old forest stand. Samples were collected, grounded, and submitted to extraction with hot water, then measured to determine total solids content (TSC), Stiasny number (SN), and condensed tannins content (CTC). FTIR spectra were acquired from tannin samples fixed in potassium bromide pellets. Among the four species, M. tenuiflora presented the highest CTC, equal to 23.4%, and the purest crude hot-water extract with SN of 91.27%. Based on FTIR characterization, tannins from M. caesalpiniifolia, A. indica, and A. mangium barks were classified as proanthocyanidins and those from M. tenuiflora bark as prodelphinidins.

Keywords: Forest species bark; Proanthocyanidins; Prodelphinidins

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Published

2021-11-12

How to Cite

Marques, S. R. R., Azevêdo, T. K. B., de Castilho, A. R. F., Braga, R. M., & Pimenta, A. S. (2021). EXTRACTION, QUANTIFICATION, AND FTIR CHARACTERIZATION OF BARK TANNINS OF FOUR FOREST SPECIES GROWN IN NORTHEAST BRAZIL. Revista Árvore, 45(1), https://doi.org/10.1590/1806–908820210000041. Retrieved from https://revistaarvore.ufv.br/rarv/article/view/253456

Issue

Revista Árvore, Viçosa-MG, v.45, 2021

Section

Wood Technology and Utilization of Forest Products

License

All authors agreed to submit the work to Revista Árvore and granted the exclusive license to publish the article. The authors affirm that it is an original work and has not been previously published elsewhere. The scientific content and opinions expressed in the article are the sole responsibility of the authors and reflect their opinions, not necessarily representing the opinions of the editorial board of Revista Árvore or of the Society of Forest Investigations (SIF).

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