Abstract—Rice wine, the traditional Japanese alcohol, contains ethanol and glucose, whose concentrations are evaluated to manage their quality. Recently, infrared techniques have been introduced to rice wine measurement, and absorption spectra are analyzed to monitor rice wine components during fermentation. However, it is difficult to precisely evaluate ethanol and glucose concentrations because of an overlapping of their absorption peaks. This paper proposes a spectral separation method using a single absorption band for evaluating the ethanol and glucose concentrations in rice wine. We evaluate their concentrations by separating a mixed spectrum into ethanol and glucose spectra. The simulation results showed a decrease in the estimation errors of ethanol and glucose concentrations from 5.40±5.41 %(v/v) and 0.73±0.73 g/dl, respectively, using regression analysis (RA) to 0.46±0.65 %(v/v) and 0.40±0.57 g/dl, respectively, using the proposed method.
Index Terms—Ethanol andglucose evaluation, regression analysis, spectral separation.
Satoru Suzuki, Satsuki Hosono, Pradeep K. W. Abeygunawardha, and Ichiro Ishimaru are with the Department of Intelligent Mechanical Systems Engineering, Kagawa University, 2217-20 Hayashi-cho Takamatsu Kagawa Japan (e-mail: s-suzuki@eng.kagawa-u.ac.jp, s11t446@stmail.eng.kagawa-u.ac.jp, kumara@eng.kagawa-u.ac.jp, ishimaru@eng.kagawa-u.ac.jp).
Kenji Wada is with the Department of Chemistry for Medicine, Kagawa University, 1750-1 Ikenobe Miki-cho Kita-gun Takamatsu Kagawa Japan (e-mail: wadaken@med.kagawa-u.ac.jp).
Akira Nishiyama is with the Department of Pharmacology, Kagawa University, 1750-1 Ikenobe Miki-cho Kita-gun Takamatsu Kagawa Japan (e-mail: akira@med.kagawa-u.ac.jp).
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Cite: Satoru Suzuki, Satsuki Hosono, Pradeep K. W. Abeygunawardha, Ichiro Ishimaru, Kenji Wada, and Akira Nishiyama, "Correction of Spectral Interference of Ethanol and Glucose for Rice Wine Evaluation," International Journal of Chemical Engineering and Applications vol. 6, no. 4, pp. 267-272, 2015.
