Floresta e Ambiente
https://floram.org/article/588e21f9e710ab87018b45cb
Floresta e Ambiente
Original Article

TEORES DE TANINOS DA CASCA E DA MADEIRA DE CINCO LEGUMINOSAS ARBÓREAS

TANNIN CONTENT OF THE BARK AND WOOD OF FIVE LEGUMINOSAE SPECIES

Gonçalves, Celso de Almeida; Lelis, Roberto Carlos C.

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Resumo

Avaliou-se o teor de polifenóis condensáveis (taninos) de extratos obtidos da casca e da madeira de cinco leguminosas arbóreas, a saber: Acacia mangium, Albizia guachapele, Mimosa caesalpiniaefolia, Piptadenia gonoacantha e Samanea samam. Duas formas de obtenção do extrato foram testadas (água e água/sulfito de sódio) e o teor de tanino foi avaliado pelo método de Stiasny. Resultados obtidos para o Número de Stiasny indicam os extratos da madeira de Mimosa caesalpiniaefolia (88%) e Piptadenia gonoacantha (83%) e da casca de Piptadenia gonoacantha (68%) e Samanea samam (51%) como fornecedores potenciais de tanino com vistas a um aproveitamento industrial.

Palavras-chave

Tanino condensável, leguminosas, número de Stiasny

Abstract

The amount of condensed polyphenols (tannin) contained in the extracts obtained from the bark and wood of five leguminosae species (Acacia mangium, Albizia guachapele, Mimosa caesalpiniaefolia, Piptadenia gonoacantha and Samanea samam) was determined. Two ways of extraction were tested (water, water/ sodium sulphite). Condensed taninns were evaluated by Stiasny’s method. Results for Stiasny’s number from water extractions showed the wood of Mimosa caesalpiniaefolia (88%) and Piptadenia gonoacantha (83%) and the bark of Piptadenia gonoacantha (68%) and Samanea samam (51%) is the potential suppliers of tannins for industrial utilization.

Keywords

condensed tannins, leguminosae, Stiasny´s number
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