光谱学与光谱分析 |
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Rapid Determination of Klason Lignin Content in Bamboo by NIR |
LI Gai-yun1,HUANG An-min1,WANG Ge2,QIN Dao-chun2,JIANG Ze-hui1* |
1. Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing 100091, China 2. International Center for Bamboo and Rattan, Beijing 100102, China |
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Abstract Lignin is one of the main components of lignocellulosic materials. The main purpose of wood cooking and bleaching is to remove lignin by chemical agent in paper industry. Whereas the lignin content shows wide variations depending on its tree specie, site condition, part and so on, it is essential to analyze the lignin content of different raw material. The aim of this paper is to develop a rapid near infrared (NIR) reflectance spectroscopic method to characterize the Klason lignin content of bamboo. Fifty four samples from three growth years, two positions along the longitudinal directions and three positions along the radial directions within a bamboo pole were prepared. The Klason lignin contents of 54 samples were analyzed according to traditional chemical method, the spectra of these samples were collected by NIR in the range of 350 to 2500 nm, and the relationship between the lignin content and the spectra of these samples was established by multivariate statistical technique. After second derivative pretreatment of raw spectra, the Klason lignin contents of the bamboo samples were quantified using partial least-squares statistical analysis (PLS1) and full cross validation in the range of 1011-1675 nm and1930-2488 nm. High coefficients of correlation (r) were obtained between the predicted NIR results and those obtained from traditional chemical method. The correlation coefficient of calibration model and prediction model was 0.99 and 0.97, respectively. The standard error of calibration (SEC) and standard error of prediction (SEP) was 0.36% and 0.59%, respectively. It was found that the lignin content in bamboo could be determined rapidly with reasonable accuracy by the NIR method.
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Received: 2006-08-28
Accepted: 2006-12-29
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Corresponding Authors:
JIANG Ze-hui
E-mail: ligy@forestry.ac.cn
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Cite this article: |
LI Gai-yun,HUANG An-min,WANG Ge, et al. Rapid Determination of Klason Lignin Content in Bamboo by NIR[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2007, 27(10): 1977-1980.
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https://www.gpxygpfx.com/EN/Y2007/V27/I10/1977 |
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