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Feasibility Study for the Detection of ß-phenylethanol in Chinese Rice Wine by Near-Infrared Spectroscopy

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  2010 Pittsburgh, Pennsylvania, June 20 - June 23, 2010  1008972.(doi:10.13031/2013.29777)
Authors:   Fei Shen, Yibin Ying, Bobin Li, Yunfeng Zheng, Muyan Zhou
Keywords:   Chinese rice wine, near-infrared spectroscopy, NIR, ß-phenylethanol

In this study, the feasible use of Near-infrared (NIR) spectroscopy combined with chemometrics for the determination of -phenylethanol content in Chinese rice wine has been preliminarily investigated. A total of 112 Chinese rice wine samples were analyzed by NIR transmission spectroscopy between 800-2500 nm. Calibration models were developed by partial least squares regression (PLSR) with gas chromatography (GC) method as the reference method. Different wavelength ranges and spectral pre-processing methods were employed in the development of calibration models. The optimal model was obtained by standard normal variate (SNV) with raw spectra using full spectral wavelength range. The calibration correlation coefficient (rcal) is 0.949, RMSEC (the value of the root-mean-square error of calibration) to 6.66 mg/L, RMSEP (the value of the root-mean-square error of prediction) to10.4 mg/L, RPD (the valve of the residual predictive deviation) to 1.83. The result shows that NIR may provide an alternative technique for the screening and detection of -phenylethanol content in Chinese rice wine. More samples should be incorporated in further in order to build a more robust model.

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