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 |
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Authors: | Anupun Terdwongworakul Vittaya Punsuwan Warunee Thanapase Satoru Tsuchikawa |
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Affiliation: | (1) Department of Food Engineering, Faculty of Engineering, Kasetsart University, Kamphangsean Campus, Nakhon Pathom, 73140, Thailand;(2) Department of Chemistry, Faculty of Science, Kasetsart University, Bangkok, 10900, Thailand;(3) Kasetsart Agricultural and Agro-Industrial Product Improvement Institute, Kasetsart University, Bangkok, 10900, Thailand;(4) Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan |
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Abstract: | 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 -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. |
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Keywords: | Near infrared spectroscopy Chemical prop-erty Pulp yield Eucalyptus camaldulensis Chemometrics |
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