Probing Sucrose Contents in Everyday Drinks Using Miniaturized Near-Infrared Spectroscopy Scanners
summary
A handheld system combines a standalone mobile NIRS scanner with a 3D-printed clamp that clips onto a straw or tube to noninvasively scan liquids. Evaluation on 25 lab solutions (0–20 g/100ml sucrose) yields ±0.29 g/100ml RMSE, and tests on 18 commercial drinks across 9 temperature and lighting conditions give <2.0 g/100ml RMSE plus >99% drink classification. Analysis highlights three responsive wavelengths 1055, 1235 and 1545 nm and shows transfer to glucose, fructose, alcohol, milk and perfume.
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