Abstract：Near infrared spectroscopy was applied to rapidly predict microfibril angle (MFA) and fiber length of Neosinocalamus affinis Keng by using a fiber-optic probe in diffuse reflectance mode. The MFA and fiber length were measured by X-ray diffractometry and optical microscope, respectively. Partial least squares (PLS) was used to build models based on raw and pretreated spectra, including noise spectra and noise combined with orthogonal signal correction (OSC) spectra. The results showed that the PLS models of MFA and fiber length, based on noise combined with OSC spectra, gave the strongest correlations, with correlation coefficient (R) of 0.893 6 and 0.988 3 and root mean standard error of prediction (RMSEP) of 0.292 0 and 0.146 0 in prediction set. The correlations between NIR predicted and MFA/fiber length actual values are very good. Therefore, it is concluded that MFA and fiber length of N. affinis can be estimated by NIR spectroscopy with sufficient accuracy.
Key words：Near infrared spectroscopy;Partial least squares;Orthogonal signal correction;Neosinocalamus affinis Keng;Microfibril angle;Fiber length
孙柏玲，柴宇博，黄安民，刘君良* . 近红外光谱法在慈竹微纤丝角和纤维长度分析中的应用 [J]. 光谱学与光谱分析, 2011, 31(12): 3251-3255.
SUN Bai-ling, CHAI Yu-bo, HUANG An-min, LIU Jun-liang* . Application of NIR Spectroscopy to Estimate of MFA and Fiber Length of Neosinocalamus affinis . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2011, 31(12): 3251-3255.
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