Rapid Determination of Lycium Barbarum Polysaccharide with Effective Wavelength Selection Using Near-Infrared Diffuse Reflectance Spectroscopy

2015 ◽  
Vol 9 (1) ◽  
pp. 131-138 ◽  
Author(s):  
Yage Wang ◽  
Yuan Gao ◽  
Xiuzhu Yu ◽  
Yuanyuan Wang ◽  
Shan Deng ◽  
...  
Keyword(s):  
Diffuse Reflectance ◽  
Near Infrared ◽  
Diffuse Reflectance Spectroscopy ◽  
Rapid Determination ◽  
Reflectance Spectroscopy ◽  
Wavelength Selection ◽  
Effective Wavelength ◽  
Lycium Barbarum ◽  
Lycium Barbarum Polysaccharide

Spectral Amplification in near Infrared Spectrometry

1998 ◽  
Vol 6 (A) ◽  
pp. A207-A210
Author(s):  
Marc Meurens
Keyword(s):  
Prediction Error ◽  
Diffuse Reflectance ◽  
Near Infrared ◽  
Diffuse Reflectance Spectroscopy ◽  
Reflectance Spectroscopy ◽  
Infrared Spectrometry ◽  
Chemical Analyses ◽  
Wavelength Selection ◽  
Near Infrared Spectrometry

“SPECTRAL AMPLIFICATION” is the significant name of a new algorithm of wavelength selection developed to improve the precision of the partial least squares (PLS) calibration of near infrared a (NIR) spectrometer for quantitative chemical analyses. This algorithm amplifies selectively some spectral data by mutiplicative coefficients so that they are predominant in the spectra and lower the prediction error of the PLS calibration. The poster presents a demonstration of “spectral amplification” in the determination of moisture on milk powders by NIR diffuse reflectance spectroscopy.

Rapid Quantification of Vitamin C in Navel Oranges by Near-Infrared Diffuse Reflectance Spectroscopy

2014 ◽  
Vol 602-605 ◽  
pp. 1534-1537 ◽  
Author(s):  
Yu Bo Liao ◽  
Long Sheng Huang ◽  
Xiao Lin Chen ◽  
Liang Liao
Keyword(s):  
Vitamin C ◽  
Diffuse Reflectance ◽  
Near Infrared ◽  
Diffuse Reflectance Spectroscopy ◽  
Rapid Determination ◽  
Reflectance Spectroscopy ◽  
Coefficient Of Determination ◽  
Validation Set ◽  
Sorting System

In this paper, NIR diffuse reflectance spectroscopy as well as the PLS method was adopted for rapid determination of vitamin C in navel oranges. The GN method was employed to select calibration and validation samples. The spectral data in the region 900-1600nm were used for modeling. The coefficient of determination of the validation set is 0.8690, and RMSECV is 1.039mg/100g. The results suggest that NIR diffuse reflectance spectroscopy may serve as a strong tool for developing an on-line fruit sorting system.

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