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Near-Infrared Spectroscopy Coupled Chemometric Algorithms for Rapid Origin Identification and Lipid Content Detection of Pinus Koraiensis Seeds

College of Mechanical and Electrical Engineering, Northeast Forestry University, Harbin 150040, China
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Author to whom correspondence should be addressed.
Sensors 2020, 20(17), 4905; https://doi.org/10.3390/s20174905
Received: 2 August 2020 / Revised: 26 August 2020 / Accepted: 28 August 2020 / Published: 30 August 2020
(This article belongs to the Section Physical Sensors)
Lipid content is an important indicator of the edible and breeding value of Pinus koraiensis seeds. Difference in origin will affect the lipid content of the inner kernel, and neither can be judged by appearance or morphology. Traditional chemical methods are small-scale, time-consuming, labor-intensive, costly, and laboratory-dependent. In this study, near-infrared (NIR) spectroscopy combined with chemometrics was used to identify the origin and lipid content of P. koraiensis seeds. Principal component analysis (PCA), wavelet transformation (WT), Monte Carlo (MC), and uninformative variable elimination (UVE) methods were used to process spectral data and the prediction models were established with partial least-squares (PLS). Models were evaluated by R2 for calibration and prediction sets, root mean standard error of cross-validation (RMSECV), and root mean square error of prediction (RMSEP). Two dimensions of input data produced a faster and more accurate PLS model. The accuracy of the calibration and prediction sets was 98.75% and 97.50%, respectively. When the Donoho Thresholding wavelet filter ‘bior4.4’ was selected, the WT–MC–UVE–PLS regression model had the best predictions. The R2 for the calibration and prediction sets was 0.9485 and 0.9369, and the RMSECV and RMSEP were 0.0098 and 0.0390, respectively. NIR technology combined with chemometric algorithms can be used to characterize P. koraiensis seeds. View Full-Text
Keywords: NIR spectroscopy; Pinus koraiensis seeds; chemometric algorithms; preprocessing; feature selection NIR spectroscopy; Pinus koraiensis seeds; chemometric algorithms; preprocessing; feature selection
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MDPI and ACS Style

Li, H.; Jiang, D.; Cao, J.; Zhang, D. Near-Infrared Spectroscopy Coupled Chemometric Algorithms for Rapid Origin Identification and Lipid Content Detection of Pinus Koraiensis Seeds. Sensors 2020, 20, 4905. https://doi.org/10.3390/s20174905

AMA Style

Li H, Jiang D, Cao J, Zhang D. Near-Infrared Spectroscopy Coupled Chemometric Algorithms for Rapid Origin Identification and Lipid Content Detection of Pinus Koraiensis Seeds. Sensors. 2020; 20(17):4905. https://doi.org/10.3390/s20174905

Chicago/Turabian Style

Li, Hongbo, Dapeng Jiang, Jun Cao, and Dongyan Zhang. 2020. "Near-Infrared Spectroscopy Coupled Chemometric Algorithms for Rapid Origin Identification and Lipid Content Detection of Pinus Koraiensis Seeds" Sensors 20, no. 17: 4905. https://doi.org/10.3390/s20174905

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