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Open AccessFeature PaperArticle

Investigations into the Performance of a Novel Pocket-Sized Near-Infrared Spectrometer for Cheese Analysis

1
CCB—Center for Chemistry and Biomedicine, Institute of Analytical Chemistry and Radiochemistry, University of Innsbruck, Innrain 80/82; 6020 Innsbruck, Austria
2
Chemical devision, HBLFA für Landwirtschaft und Ernährung, Lebensmittel und Biotechnologie Tirol, Rotholz 50a, 6200 Strass im Zillertal, Austria
*
Author to whom correspondence should be addressed.
Molecules 2019, 24(3), 428; https://doi.org/10.3390/molecules24030428
Received: 6 December 2018 / Revised: 18 January 2019 / Accepted: 22 January 2019 / Published: 24 January 2019
The performance of a newly developed pocket-sized near-infrared (NIR) spectrometer was investigated by analysing 46 cheese samples for their water and fat content, and comparing results with a benchtop NIR device. Additionally, the automated data analysis of the pocket-sized spectrometer and its cloud-based data analysis software, designed for laypeople, was put to the test by comparing performances to a highly sophisticated multivariate data analysis software. All developed partial least squares regression (PLS-R) models yield a coefficient of determination (R2) of over 0.9, indicating high correlation between spectra and reference data for both spectrometers and all data analysis routes taken. In general, the analysis of grated cheese yields better results than whole pieces of cheese. Additionally, the ratios of performance to deviation (RPDs) and standard errors of prediction (SEPs) suggest that the performance of the pocket-sized spectrometer is comparable to the benchtop device. Small improvements are observable, when using sophisticated data analysis software, instead of automated tools. View Full-Text
Keywords: NIR; SCiO; pocket-sized spectrometer; cheese; fat; moisture; multivariate data analysis NIR; SCiO; pocket-sized spectrometer; cheese; fat; moisture; multivariate data analysis
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MDPI and ACS Style

Wiedemair, V.; Langore, D.; Garsleitner, R.; Dillinger, K.; Huck, C. Investigations into the Performance of a Novel Pocket-Sized Near-Infrared Spectrometer for Cheese Analysis. Molecules 2019, 24, 428.

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