光谱学与光谱分析 |
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Rapid Modeling Method for Spectroscopic Analysis of Chemical Components of Bamboo |
LI Gai-yun,HUANG An-min,QIN Te-fu* |
Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing 100091, China |
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Abstract A rapid modeling method for predicting the chemical components contents of bamboo was presented. The holocellulose contents and lignin contents of 54 samples from three growth years, two longitudinal positions and three radial positions were analyzed according to traditional chemical methods. Eleven samples were selected based on their holocellulose content and lignin content from these 54 samples to cover the range of holocellulose content and lignin content. Eleven samples were mixed at preset ratio with each other to give 21 mixed samples, the holocellulose content and lignin contents of which were computed. Another 22 samples with different chemical component contents were selected from the same 54 samples. The relationship between the chemical component contents and the diffuse reflectance NIR spectra of these samples was established using partial least squares regression. The correlation coefficient of prediction model for holocellulose content and lignin content was 0.92 and 0.93, respectively. The standard error of prediction for holocellulose content and lignin content was 1.04% and 0.91%, respectively. The prediction results were similar to those from the prediction models developed by traditional methods. The results presented in this study demonstrate that samples can be prepared rapidly by the mixture of samples with each other and their chemical component contents can be computed. The technique will significantly reduce sampling time and analyzing time without adversely affecting the quality of the model.
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Received: 2008-08-10
Accepted: 2008-11-20
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Corresponding Authors:
QIN Te-fu
E-mail: qintefu@caf.ac.cn
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