Rapid assessment of wood chemical properties and pulp yield of Eucalyptus camaldulensis in Thailand tree plantations by near infrared spectroscopy for improving wood selection for high quality pulp

Near-infrared (NIR) spectroscopy has been demonstrated as a means for rapid nondestructive determination of the chemical composition and final pulp yield of Eucalyptus camaldulensis in Thailand tree plantations. Multiple linear regression (MLR) analysis and partial least squares (PLS) analysis were...

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Bibliographic Details
Published in:Journal of wood science 2005-04, Vol.51 (2), p.167-171
Main Authors: Terdwongworakul, A. (Kasetsart Univ., Bangkok (Thailand)), Punsuwan, V, Thanapase, W, Tsuchikawa, S
Format: Article
Language:English
Subjects:
Assessments
Calibration
CHEMICAL COMPOSITION
Chemical properties
Eucalyptus
EUCALYPTUS CAMALDULENSIS
Infrared spectroscopy
Lignin
MATHEMATICAL MODELS
Near infrared radiation
Organic chemistry
Plantations
PULPWOOD
Regression analysis
SPECTROMETRY
Spectrum analysis
Standard error
Statistical analysis
STATISTICAL METHODS
Statistical models
THAILAND
WOOD PROPERTIES
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Summary:Near-infrared (NIR) spectroscopy has been demonstrated as a means for rapid nondestructive determination of the chemical composition and final pulp yield of Eucalyptus camaldulensis in Thailand tree plantations. Multiple linear regression (MLR) analysis and partial least squares (PLS) analysis were introduced to develop statistical models in terms of calibration equations for total pulp yield, screened pulp yield, and contents of alpha-cellulose, pentosans, and lignin in wood. In MLR analysis, a reasonably good calibration equation was found only for pentosans (standard error of prediction (SEP): 0.98%). The PLS analysis improved the accuracy of prediction for every criterion variable, especially for pentosans (SEP: 0.91%) and lignin (SEP: 0.52%). Also, in the case of screened pulp yield, we were able to use such a statistical result as an indicator of the characteristics of the pulp and paper. Thus, NIR spectroscopy could be satisfactorily used as an effective assessment technique for Eucalyptus camaldulensis plantation trees.
ISSN:1435-0211
1611-4663
DOI:10.1007/s10086-004-0633-3