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Licensed Unlicensed Requires Authentication Published by De Gruyter June 22, 2012

Assessment of total phenols and extractives of mahogany wood by near infrared spectroscopy (NIRS)

Allan Ribeiro da Silva, Tereza Cristina Monteiro Pastore, Jez Willian Batista Braga, Fabrice Davrieux, Esmeralda Yoshico Arakaki Okino, Vera Teresinha Rauber Coradin, José Arlete Alves Camargos and Alexandre Gustavo Soares do Prado
From the journal Holzforschung

Abstract

The resistance to decomposition of mahogany wood (Sweitenia macrophylla King) ranges from high to moderate level. Wood extractives, mainly due to the presence of phenol compounds are related to the natural durability of wood. The technique of near infrared spectroscopy (NIRS) coupled with multivariate analysis has been applied to assess the extractives and phenols of 41 samples of mahogany in powder form. The hot water-soluble extractives were quantitatively determined, and total phenol content was measured with the Folin-Denis colourimetric reagent. Models were developed with the NIRS data for each of the two variables. The results indicated that NIRS can be a useful tool to a rapid evaluation of the extractive contents and total phenolic compounds of mahogany wood. The method was able to predict the interesting properties with errors lower than 10% (w/w) and had the capability of detecting samples that have a minimum concentration of 2.4% (w/w) of extractives and total phenolic compounds, respectively.


Corresponding author. Laboratório de Produtos Florestais Serviço Florestal Brasileiro, SCEN trecho 2 Bloco D 70818900, Brasilia, DF, Brazil

Received: 2011-10-10
Accepted: 2012-5-30
Published Online: 2012-06-22
Published in Print: 2013-01-01

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