光谱学与光谱分析 |
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Nondestructive Measurement of Vitamin C in Nanfeng Tangerine by Visible/Near-Infrared Diffuse Reflectance Spectroscopy |
LIU Yan-de,CHEN Xing-miao,SUN Xu-dong |
College of Engineering, Jiangxi Agricultural University, Nanchang 330045, China |
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Abstract The present paper reports the study on visible/near-infrared (Vis/NIR) diffuse reflectance spectroscopy for nondestructive measurement of vitamin C in tangerine (Nanfeng, Jiangxi). In the wavelength range of 350-1 800 nm, principal component analysis (PCA) and partial least squares (PLS) were used to build mathematic models with respect to pre-processing spectra. The principal components (PCs) and wavelength selection for calibration model were determined based on full cross validation and regression coefficients. The results, based on prediction for 10 unknown samples, are 0.813,2.112 mg(100 g)-1 and -0.810 mg(100 g)-1 for prediction correlation coefficient, root mean square error of prediction, and prediction deviation, respectively. The analysis methods and conclusions of this experiment will provide some reference values for non-destructive measurement of vitamin C and other quality indices in Nanfeng tangerine using Vis/NIR diffuse reflectance spectrometric technique.
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Received: 2007-10-02
Accepted: 2008-01-08
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Corresponding Authors:
LIU Yan-de
E-mail: jxliuyd@163.com
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