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A method for rapid identification of vintage wine by electrochemical impedance spectroscopy

A technology of impedance spectroscopy and electrochemistry, applied in the direction of material electrochemical variables, scientific instruments, material analysis through electromagnetic means, etc., can solve the problems of non-existing wine standard verification instruments, low sensitivity, and no vintage wine standard, etc. Achieve fast electron transfer rate, wide electrochemical window, and short detection time

Active Publication Date: 2021-03-02
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Infrared Spectroscopy (IR) analysis technology is simple and fast to operate, but its sensitivity is low
Therefore, the liquor industry has not formed a fast and accurate detection and evaluation method for vintage wine standards so far, so there has not been a fast and accurate verification instrument for vintage wine standards so far.

Method used

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  • A method for rapid identification of vintage wine by electrochemical impedance spectroscopy

Examples

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Effect test

Embodiment 1

[0025] Select different years of liquor as the object, the years are 1 year, 3 years, 5 years, 9 years, 12 years, 15 years, 20 years, 30 years, each sampling 10mL, add 0.01mol / L potassium ferricyanide solution. The graphene electrode was used as the working electrode, the Ag-AgCl electrode was used as the reference electrode, and the graphite carbon rod was used as the auxiliary electrode for impedance measurement. The measured AC amplitude is 10 mV, the frequency range is 1Hz-0.1MHz, and the measurement time is 2min. The impedance diagram was simulated in the CorrTest.CSStudio software, and the simulated data obtained were input into the matlab software for principal component analysis (PCA), and the three-dimensional diagram of the principal component score was obtained. In this way, the spatial areas of the cellared liquor in different years are divided in the three-dimensional map.

Embodiment 2

[0027] After completing the process of Example 1, the three-dimensional scatter point distribution model of vintage wine is obtained, and three kinds of vintage liquors (7 years, 13 years, and 22 years) are randomly selected as objects for testing. Sampling 10mL respectively, respectively adding 0.01mol / L potassium ferricyanide solution. The graphene electrode was used as the working electrode, the Ag-AgCl electrode was used as the reference electrode, and the graphite carbon rod was used as the auxiliary electrode for impedance measurement. The measured AC amplitude is 10 mV, the frequency range is 1Hz-0.1MHz, and the measurement time for each sample is 2min. The impedance diagram is simulated in the CorrTest.CSStudio software. Gained simulated data is input into the three-dimensional scatter distribution model gained by matlab software (the three-dimensional scatter distribution model gained in Example 1) for data analysis, and the calculation is carried out according to th...

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Abstract

The invention discloses a method for rapidly identifying age liquor through electrochemical impedance spectroscopy. The chemical impedance spectroscopy represents impedance characteristics of liquor colloid of the age liquor. The method comprises the following steps of firstly, adopting high-frequency-band impedance measurement for 2 to 3 minutes; secondly, simulating an equivalent circuit throughimpedance spectrums of the age liquor, and carrying out dimensionality reduction treatment on impedance factors in the equivalent circuit by utilizing principal component analysis; and lastly, identifying the age liquor according to different impedance behaviors of colloid particles in different age liquor on the surface of a graphene electrode. The electrochemical impedance spectroscopy disclosed by the invention is a rapid, economic and lossless method for identifying the age liquor, the defects of an existing method can be made up, the difference between the age liquor is not judged by several characteristic values, but the difference is comprehensively judged, and a foundation is laid for developing detection equipment or industrial on-line monitoring equipment for distinguishing thedifferent age liquor.

Description

technical field [0001] The invention relates to a method for quickly identifying aged wine by electrochemical impedance spectroscopy, in particular to realizing rapid and accurate identification of aged wine by utilizing the principle of electrochemical impedance spectroscopy. Background technique [0002] The cellaring process in the production of Chinese liquor is to store the fermented and distilled liquor for a period of time, so that the dryness and spicy taste of the liquor is obviously reduced, the liquor body is soft, and the flavor is harmonious. This stored wine is called vintage wine. The longer Chinese baijiu is cellared, the softer and more harmonious the flavor of the wine will be. [0003] At present, the identification of the age of liquor in the cellar in my country mostly adopts the method of chemical composition analysis, and analyzes the aroma components, generally using infrared spectroscopy, Raman spectroscopy, gas chromatography, liquid chromatography...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/30G01N27/416
Inventor 谢逾群万端极刘德富张子蓬陈水胜王超蒋心越张莹李祝常锋毅汪淑廉梅洪葛红梅
Owner HUBEI UNIV OF TECH
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