Smartphone imaging spectrometer for egg/meat freshness monitoring. Issue 5 (20th January 2022)

• Record Type: Journal Article
• Authors: Wang, Tianci; Shen, Fuzhou; Deng, Hancheng; Cai, Fuhong; Chen, Shufen
• Is Part Of: Analytical methods. Volume 14:Issue 5(2022)
• Page Start: 508
• Page End: 517
• Publication Date: 2022-01-20
• Subjects: Chemistry, Analytic -- Periodicals; Analytical biochemistry -- Periodicals; Chemical laboratories -- Standards -- Periodicals; 543.1905
• DOI: 10.1039/d1ay01726h
• Languages: English
• ISSNs: 1759-9660

Abstract

Abstract : A reliable smartphone imaging spectrometer developed foron-site food freshness testing offers portability, CMOS compatibility, enhanced near-infrared spectrum capture capability and on-the-go (OTG) functionality. 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.