Evaluation of Lignin Syringyl/Guaiacyl Ratio in Eucalyptus Camaldulensis across Three Diverse Sites Based on near Infrared Spectroscopic Calibration Modelling with Five Eucalyptus Species and its Impact on Kraft Pulp Yield

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2016-11-18 DOI:10.1255/jnirs.1251

P. Ramadevi, D. Hegde, M. Varghese, R. Kamalakannan, Suraj P. Ganapathy, D. S. Gurumurthy

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引用次数: 21

Abstract

Lignin composition [syringyl/guaiacyl (S/G) ratio] and cellulose content in wood have an important bearing on pulp yield. This paper deals with the development of a calibration model for S/G ratio using five Eucalyptus species from different sites by diffuse reflectance near infrared spectroscopy. The model was constructed with 120 samples covering an S/G ratio range from 1.8 to 3.6, determined by pyrolysis-gas chromatography-mass spectrometry. The calibration plot has an R2 value of 0.825 which was validated in E. camaldulensis, E. urophylla and E. pellita. Variation in S/G ratio was studied in more than 3000 E. camaldulensis trees across three diverse sites in southern India. The S/G ratio was lower in a low rainfall site (Mahabubnagar) compared to a higher rainfall site (Ongole). A positive correlation (R2 = 0.72) was observed between S/G ratio and Kraft pulp yield in E. camaldulensis. Alkali consumption in Kraft pulping experiments was inversely proportional to the S/G ratio (R2 = 0.914).

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基于5种桉树近红外光谱定标模型评价3个不同产地山梨桉木质素丁香基/愈创木基比值及其对硫酸盐纸浆收率的影响

木质素组成[丁香基/愈创木基(S/G)比]和纤维素含量对纸浆收率有重要影响。利用近红外漫反射光谱技术建立了不同产地5种桉树的S/G比定标模型。采用热解-气相色谱-质谱法测定120个样品的S/G比为1.8 ~ 3.6。校正图的R2值为0.825，在山竹、尾叶和糙皮中均能得到验证。研究了印度南部3个不同地点3000多棵camaldulensis树的S/G比变化。低降雨点(Mahabubnagar)的S/G比低于高降雨点(Ongole)。甘薯的S/G比值与硫酸盐浆得率呈显著正相关(R2 = 0.72)。硫酸盐制浆试验中碱耗量与S/G比成反比(R2 = 0.914)。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.