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Effects of sample preparation on NIR spectroscopic estimation of chemical properties of Eucalyptus urophylla S.T. Blake wood

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Published/Copyright: December 4, 2009
Holzforschung
From the journal Volume 64 Issue 1

Abstract

Many studies have successfully applied near infrared (NIR) spectroscopy to estimate important wood traits. Some of them have reported the effects of wood surfaces on NIR spectra information and their influence on the performance of the predictive model. However, limited information is available concerning the effect of sample preparation on the model performance to estimate chemical properties in Eucalyptus wood. Hence, the aim of this study was to investigate the influence of the milling procedure, particle size, and quality of the solid wood surface on the performance of the partial least squares regression to predict chemical properties of Eucalyptus urophylla wood by NIR spectroscopy. Adequate models were built to predict klason lignin content, acid-soluble lignin content, and syringyl-to-guaiacyl ratio in Eucalyptus urophylla wood. Sample preparation strongly influences the ratio of performance to deviation (RPD) of these predictive models. The effect of the sample presentation (solid or milled wood) was stronger than the effect of the particle size difference between thin and thick powder. The best calibrations were developed using NIR spectra measured on wood powder (RDP values from 1.99 to 2.97), but satisfactory calibrations were developed from NIR spectra measured on solid samples (RPD values from 1.68 to 2.16).

Keywords: acid-soluble lignin; Eucalyptus urophylla; lignin; near infrared (NIR) spectroscopy; particle size; solid wood; syringyl-to-guaiacyl ratio; wood powder; wood surface
Corresponding author. CIRAD, PERSYST Department, Production and Processing of Tropical Woods, 73 rue Jean-François Breton TA B-40/16, 34398 Montpellier Cedex 5, France Phone: +33-4-67614451, Secretary: +33-4-67596525 Fax: +33-4-67616560
Received: 2009-4-8
Accepted: 2009-7-30
Published Online: 2009-12-04
Published Online: 2009-12-07
Published in Print: 2010-01-01

©2010 by Walter de Gruyter Berlin New York

Articles in the same Issue

  1. Original Papers
  2. Initiating ECF bleaching sequences of eucalyptus kraft pulps with Z/D and Z/E stages
  3. Characterization of black liquors from kraft pulping of first-thinning Scots pine (Pinus sylvestris L.)
  4. Analysis of products from the oxidation of technical lignins by oxygen and H3PMo12O40 in water and aqueous methanol by size-exclusion chromatography
  5. Oxidative polymerisation of models for phenolic lignin end-groups by laccase
  6. Determination of anionic groups in wood by time-of-flight secondary ion mass spectrometry and laser ablation-inductively coupled plasma-mass spectrometry
  7. Effects of sample preparation on NIR spectroscopic estimation of chemical properties of Eucalyptus urophylla S.T. Blake wood
  8. Detection of wet-pockets on the surface of Tsuga heterophylla (Raf.) Sarg. by near infrared (NIR) spectroscopy
  9. Cellular distribution of coniferin in differentiating xylem of Chamaecyparis obtusa as revealed by Raman microscopy
  10. Hydrolysis of cellulose and wood powder treated with DMDHEU by a hydrolase enzyme complex, Fenton's reagent, and in a liquid culture of Trametes versicolor
  11. Effects of timing and intensity of thinning on wood structure and chemistry in Norway spruce
  12. Effects of calcium-based materials and iron impurities on wood degradation by the brown rot fungus Serpula lacrymans
  13. Lignin and carbohydrate variation with earlywood, latewood, and compression wood content of bent and straight ramets of a radiata pine clone
  14. Tensile stress relaxation of wood impregnated with different ACQ formulations at various temperatures
  15. Estimate of resistance-curve in wood through the double cantilever beam test
  16. Moisture-induced stresses and distortions in spruce cross-laminates and composite laminates
  17. Short Note
  18. Recovery of cellulose and xylan liquefied in ionic liquids by precipitation in anti-solvents
  19. Meetings
  20. Meetings
https://doi.org/10.1515/hf.2010.011
Keywords for this article
acid-soluble lignin; Eucalyptus urophylla; lignin; near infrared (NIR) spectroscopy; particle size; solid wood; syringyl-to-guaiacyl ratio; wood powder; wood surface

Articles in the same Issue

  1. Original Papers
  2. Initiating ECF bleaching sequences of eucalyptus kraft pulps with Z/D and Z/E stages
  3. Characterization of black liquors from kraft pulping of first-thinning Scots pine (Pinus sylvestris L.)
  4. Analysis of products from the oxidation of technical lignins by oxygen and H3PMo12O40 in water and aqueous methanol by size-exclusion chromatography
  5. Oxidative polymerisation of models for phenolic lignin end-groups by laccase
  6. Determination of anionic groups in wood by time-of-flight secondary ion mass spectrometry and laser ablation-inductively coupled plasma-mass spectrometry
  7. Effects of sample preparation on NIR spectroscopic estimation of chemical properties of Eucalyptus urophylla S.T. Blake wood
  8. Detection of wet-pockets on the surface of Tsuga heterophylla (Raf.) Sarg. by near infrared (NIR) spectroscopy
  9. Cellular distribution of coniferin in differentiating xylem of Chamaecyparis obtusa as revealed by Raman microscopy
  10. Hydrolysis of cellulose and wood powder treated with DMDHEU by a hydrolase enzyme complex, Fenton's reagent, and in a liquid culture of Trametes versicolor
  11. Effects of timing and intensity of thinning on wood structure and chemistry in Norway spruce
  12. Effects of calcium-based materials and iron impurities on wood degradation by the brown rot fungus Serpula lacrymans
  13. Lignin and carbohydrate variation with earlywood, latewood, and compression wood content of bent and straight ramets of a radiata pine clone
  14. Tensile stress relaxation of wood impregnated with different ACQ formulations at various temperatures
  15. Estimate of resistance-curve in wood through the double cantilever beam test
  16. Moisture-induced stresses and distortions in spruce cross-laminates and composite laminates
  17. Short Note
  18. Recovery of cellulose and xylan liquefied in ionic liquids by precipitation in anti-solvents
  19. Meetings
  20. Meetings
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