2025 Volume 72 Issue 3 Pages 89-94
In this study, we examined the possibility of estimating the water, lipid, soluble component, and salt contents of Kezuribushi using near-infrared (NIR) spectroscopy. A calibration curve was obtained through partial least squares regression models based on the analytical measurement values and NIR spectra of 82 Kezuribushi samples. There was a very high correlation between the values obtained by analytical measurements and those predicted by NIR spectroscopy. The estimation accuracy of NIR spectroscopy was rated as “extremely accurate and comparable to analytical measurements” for water and lipid contents, and “highly accurate and can be estimated without problems” for soluble component and salt contents. These results suggest that NIR spectroscopy can be used for quality evaluation, process control, and product inspection of Kezuribushi.
