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Scientia Silvae Sinicae ›› 2014, Vol. 50 ›› Issue (9): 124-128.doi: 10.11707/j.1001-7488.20140917

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Rapid Prediction of the Weight Percentage Gain of Acetylated Wood Using Near Infrared Spectroscopy

Chai Yubo1, Sun Bailing1, Liu Junliang1, Qin Tefu1, Chu Fuxiang2   

  1. 1. Research Institute of Wood Industry, CAF Beijing 100091;
    2. Chinese Academy of Forestry Beijing 100091
  • Received:2013-09-11 Revised:2013-12-18 Online:2014-09-25 Published:2014-09-30
  • Contact: 孙柏玲

Abstract:

Near infrared(NIR) spectroscopy technique was applied to predict weigh percentage gain (WPG) of acetylated Populus ussuriensis wood and Pinus sylvestris var. mongolica wood. In the region of 780-2 500 nm, partial least squares (PLS) was used to build models of WPG of acetylated wood based on raw spectra of wood transverse section and pretreated spectra, including first derivative spectra, second derivative spectra, standard normalized variate spectra and noise spectra. The results showed that the PLS models of WPG of acetylated P. ussuriensis wood and Pinus sylvestris var. mongolica wood, based on standard normalized variate spectra and noise spectra, gave the strongest correlations, with correlation coefficient (R) of 0.90 and 0.70 and root mean standard error of prediction (RMSEP) of 1.0072 and 1.3012 in prediction set. The relation between NIR predicted and WPG actual values of acetylated P. ussuriensis wood was much better than that of acetylated Pinus sylvestris var. mongolica wood. Therefore, it is concluded that WPG of acetylated wood can be estimated by NIR spectroscopy with sufficient accuracy.

Key words: near infrared spectroscopy, acetylation, Populus ussuriensis, Pinus sylvestris var. mongolica, weight percentage gain

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