Issue 5, 2022

Smartphone imaging spectrometer for egg/meat freshness monitoring

Abstract

Data transmission between spectroscopy equipment and mobile terminals is critical to realising hand-held field-level monitoring. Currently, on-the-go (OTG) communication technology is a convenient and efficient method of data transmission for mobile devices. However, few people associate spectroscopy equipment with smartphones through the OTG port. This study developed a portable imaging spectrometer with a spectral resolution of approximately 12 nm in the visible-near-infrared band (400–1000 nm). It can be connected to a smartphone through the USB-OTG port to process the spectral signal through the smartphone's system on a chip (SoC). It also displays real-time spectral images of the food samples through the smartphone's screen. Using a support vector machine (SVM) to classify the spectra of the various experimental samples (e.g. eggs and pork), the model prediction accuracy rate is approximately 90%. This further proves the reliability of the proposed smartphone imaging spectrometer for monitoring the freshness of food samples onsite.

Graphical abstract: Smartphone imaging spectrometer for egg/meat freshness monitoring

Article information

Article type
Paper
Submitted
11 Okt 2021
Accepted
30 Des 2021
First published
04 Jan 2022

Anal. Methods, 2022,14, 508-517

Smartphone imaging spectrometer for egg/meat freshness monitoring

T. Wang, F. Shen, H. Deng, F. Cai and S. Chen, Anal. Methods, 2022, 14, 508 DOI: 10.1039/D1AY01726H

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