Abstract
A Chinese yellow wine classification method is proposed based on chemometricanalysis of voltammogram of copper electrode. The main components in Chinese yellowwine are alcohol, amino acids and carbon hydrates. In strong alkaline solution copperelectrode shows rich voltammetric responses to these components. Principal componentanalysis is employed to analyse voltammetric response of copper electrode to six Chinesewine samples in strong alkaline solution. The score plots show good discrimination of thesewine samples. In order to compress the original voltammetric data, a windowed time slicingmethod is investigated in this study. It greatly reduces the input data number and theresulted PCA plot still has good discrimination ability.
Highlights
Electronic tongue, which is a mimic of mammalian gustation system, gives a qualitative evaluation of the tested samples [1,2,3,4,5]
We report an electronic tongue for classification of Chinese yellow wines based on chemometric analysis of cyclic voltammogram of copper electrode
It is believed that the redox couple Cu(OH)2/CuOOH can catalyze the oxidation of absorbed enol group at relative low potential range in strong alkaline solution
Summary
Electronic tongue, which is a mimic of mammalian gustation system, gives a qualitative evaluation of the tested samples [1,2,3,4,5]. Small amplitude pulse voltammetry and staircase voltammetry were applied to these electrodes and principal component analysis (PCA) was used to evaluate the data. Mikkelsen and Mikkelsen [10] proposed to classify beverage samples based on chemometric analysis of square wave voltammograms of unmodified single electrode. Their results show the discrimination of different juice samples with chemometric analysis of square wave voltammogram of platinum electrode.
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