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Vol. 27 No. 1 (2015): Vol 27 Issue 1

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Determination of Total Ester Content in Chinese Liquor by Combining Near-Infrared Spectroscopy and Wavelet-Based Calibration

https://doi.org/10.14233/ajchem.2015.17888
C. Tan
Department of Chemistry and Chemical Engineering and Key Lab of Process Analysis and Control of Sichuan Universities, Yibin University, Yibin 644007, P.R. China; Computational Physics Key Laboratory of Sichuan Province, Yibin University, Yibin 644007, P.R. China
H. Chen
Hospital, Yibin University, Yibin 644007, P.R. China
T. Wu
Department of Chemistry and Chemical Engineering and Key Lab of Process Analysis and Control of Sichuan Universities, Yibin University, Yibin 644007, P.R. China
Z. Lin
Department of Chemistry and Chemical Engineering and Key Lab of Process Analysis and Control of Sichuan Universities, Yibin University, Yibin 644007, P.R. China
L. Wang
Department of Chemistry and Chemical Engineering and Key Lab of Process Analysis and Control of Sichuan Universities, Yibin University, Yibin 644007, P.R. China

Corresponding Author(s) : C. Tan

chaotan1112@163.com

Asian Journal of Chemistry, Vol. 27 No. 1 (2015): Vol 27 Issue 1

Abstract

Chinese liquor is one of the famous distilled spirits in China. How to accurately quantify total ester content of liquor is a problem. The feasibility of combining near-infrared spectroscopy with a calibration model for total ester content quantization is investigated. One hundred and thirty-seven samples of commercial bottled liquors were used for experiment. A new calibration procedure called reconstructed partial least squares, which is a combination of partial least squares, wavelet transform and mutual information, was developed. It is actually partial least squares modeling in reconstructed original domain coupled with mutual information-induced variable selection in wavelet domain. Three kinds of calibration procedure were used for comparison. It concluded that, compared to the reference methods, reconstructed partial least squares can produce better models without increased complexity for an end-user. Even if the proposed reconstructed partial least squares is only be used to determine the total ester content, it can be a potential tool for near-infrared analysis of other complex samples.

Keywords

Ester Liquor Near-infrared Wavelet Mutual information
Tan, C., Chen, H., Wu, T., Lin, Z., & Wang, L. (2014). Determination of Total Ester Content in Chinese Liquor by Combining Near-Infrared Spectroscopy and Wavelet-Based Calibration. Asian Journal of Chemistry, 27(1), 335–339. https://doi.org/10.14233/ajchem.2015.17888
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