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首页> 外文期刊>Journal of the Brazilian Chemical Society >Exploratory Analysis of the Distribution of Lignin and Cellulose in Woods by Raman Imaging and Chemometrics
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Exploratory Analysis of the Distribution of Lignin and Cellulose in Woods by Raman Imaging and Chemometrics

机译：用拉曼成像和化学计量学探索分析木质素和纤维素在木材中的分布。

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The determinations of cellulose and lignin are important in wood analysis from both perspectives: chemistry composition, commercial and industrial application of woods. In this context, Raman image spectroscopy was applied in the determination of cellulose and lignin distribution in wood surfaces of Swietenia macrophylla King (Mahogany) and Eucalyptus hybrid (E. urophylla × E. camaldulensis). The relative concentration maps were obtained by applying a multivariate curve resolution procedure. The estimated Raman spectra for cellulose and lignin agrees with the ones available in the literature. The cellulose concentration maps showed similar variations for both studied species with an average value of nearly 85% as obtained by the reference method. The lignin concentration maps were somewhat different. The Eucalyptus hybrid presents a broader distribution (20 to 45%) while for Mahogany it is nearly constant, around 25%, with localized regions presenting contents of 45 to 65% of lignin. The reference method showed that the mean lignin content of both species is 27%. The cellulose and lignin concentration maps agree with the biological functions of the anatomic structures observed in the images.
机译：从两种角度来看，纤维素和木质素的测定在木材分析中都很重要：化学成分，木材的商业和工业应用。在这种情况下，拉曼光谱法被用于测定大叶Swietenia macrophylla King（桃花心木）和Eucalyptus杂种（E. urophylla×E. camaldulensis）的木质表面中纤维素和木质素的分布。相对浓度图通过应用多元曲线解析程序获得。估计的纤维素和木质素拉曼光谱与文献中的光谱一致。纤维素浓度图显示两种研究物种的相似变化，通过参考方法获得的平均值接近85％。木质素浓度图有些不同。桉树杂种表现出更广泛的分布（20％至45％），而桃花心木则几乎恒定，约为25％，局部区域的木质素含量为45％至65％。参考方法表明，两种物种的平均木质素含量为27％。纤维素和木质素浓度图与图像中观察到的解剖结构的生物学功能一致。

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