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.
Key words：Visible/near-infrared diffuse reflectance spectroscopy;Nondestructive measurement;Partial least squares;Vitamin C;Nanfeng tangerine
刘燕德,陈兴苗,孙旭东. 可见/近红外漫反射光谱无损检测南丰蜜桔维生素C的研究[J]. 光谱学与光谱分析, 2008, 28(10): 2318-2320.
LIU Yan-de,CHEN Xing-miao,SUN Xu-dong. Nondestructive Measurement of Vitamin C in Nanfeng Tangerine by Visible/Near-Infrared Diffuse Reflectance Spectroscopy. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2008, 28(10): 2318-2320.
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