A material component detection method of electronic tongue pulse relaxation signal curve

A relaxation signal and detection method technology, applied in the direction of electrochemical variables of materials, etc., can solve the problems of insufficient precision, insufficient information, and inability to detect and analyze components, and achieve the effect of wide detection range and accurate detection results.

Active Publication Date: 2017-04-19
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, traditional electronic tongues including volt-ampere electronic tongues still have certain limitations: (1) Since the information of the vertex and inflection point eigenvalues ​​of the extracted response signal is not comprehensive enough, in general, the electronic tongue can only be used for different The overall difference between samples can be distinguished, such as liquor with different flavors, tea leaves from different origins, etc. It is impossible to independently detect and analyze each component in a multi-component sample
(2) Even for the concentration detection of a single component solution, its accuracy is not high enough to achieve quantitative detection and analysis

Method used

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  • A material component detection method of electronic tongue pulse relaxation signal curve
  • A material component detection method of electronic tongue pulse relaxation signal curve
  • A material component detection method of electronic tongue pulse relaxation signal curve

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 1. Configuration sample:

[0044] Sample A: 0.2mol / L potassium chloride solution; Sample B: 0.5mol / L potassium chloride solution;

[0045] Sample C: 0.7mol / L potassium chloride solution; reference substance D: 1.0mol / L potassium chloride solution.

[0046] 2. Sensor preparation:

[0047] 1) Electrode preparation: Electrode preparation: Embed No. 1 platinum column with a diameter of 0.5 cm and a height of 0.3 cm in the center of a square face of a 1 cm × 1 cm × 0.5 cm polytetrafluoroethylene cube; on the top surface perpendicular to the square face Embedded in a copper column with a diameter of 1.5mm and a height of 3cm, and connected to the No. 1 platinum column; embedded in the center of another square surface opposite to the above square surface, a No. 2 platinum column with a diameter of 1.5mm and a height of 0.2cm, and connected with the No. 1 platinum column is connected to make an electrode. Prepare two identical electrodes in this way;

[0048] 2) Cut the fil...

Embodiment 2

[0053] 1. Configuration sample:

[0054] Test sample E: 0.3mol / L citric acid + 0.4mol / L sucrose + 0.6mol / L sodium chloride aqueous solution

[0055] Reference substance F: 0.5mol / L citric acid + 0.8mol / L sucrose + 1.0mol / L sodium chloride aqueous solution

[0056] 2. Sensor preparation:

[0057] 1) Electrode preparation: Electrode preparation: Embed No. 1 platinum column with a diameter of 0.5 cm and a height of 0.3 cm in the center of a square face of a 1 cm × 1 cm × 0.5 cm polytetrafluoroethylene cube; on the top surface perpendicular to the square face Embedded in a copper column with a diameter of 1.5mm and a height of 3cm, and connected to the No. 1 platinum column; embedded in the center of another square surface opposite to the above square surface, a No. 2 platinum column with a diameter of 1.5mm and a height of 0.2cm, and connected with the No. 1 platinum column is connected to make an electrode. Prepare two identical electrodes in this way;

[0058] 2) Cut the filt...

Embodiment 3

[0064] 1. Configuration sample:

[0065] Sample G: 4mg / L melamine-milk powder solution;

[0066] Sample H: 8mg / L melamine-milk powder solution;

[0067] Sample I: 12mg / L melamine-milk powder solution;

[0068] Reference substance J: 15mg / L melamine-milk powder solution.

[0069] 2. Sensor preparation:

[0070] 1) Electrode preparation: Electrode preparation: Embed No. 1 platinum column with a diameter of 0.5 cm and a height of 0.3 cm in the center of a square face of a 1 cm × 1 cm × 0.5 cm polytetrafluoroethylene cube; on the top surface perpendicular to the square face Embedded in a copper column with a diameter of 1.5mm and a height of 3cm, and connected to the No. 1 platinum column; embedded in the center of another square surface opposite to the above square surface, a No. 2 platinum column with a diameter of 1.5mm and a height of 0.2cm, and connected with the No. 1 platinum column is connected to make an electrode. Prepare two identical electrodes in this way;

[00...

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Abstract

The invention belongs to the technical field of food measurement and relates to a material composition detection method for an electronic tongue pulse relaxation signal curve. The method comprises the following steps: (1) preparing a detection sensor; (2) detecting a sample by virtue of the sensor by using a pulse signal; (3) determining different time points and I(t) under the different time points according to a time interval; (4) establishing a curve model; (5) expressing a curve model formula into an equation set according to the time points; (6) obtaining the next series of I0 values of the curve by virtue of an inverse algorithm, drawing, thereby obtaining a wave crest map; and (7) performing peak area comparison on the wave crest map of the detected sample and a wave crest map of a reference substance, thereby obtaining the types and content of the various components in the detected sample. According to the detection method, the defect that only the whole detected sample can be analyzed in the field of the traditional electronic tongue measurement is overcome, the various components in the detected substance are independently analyzed, the qualitative and quantitative detection is realized, the detection result is relatively accurate, and the detection range is relatively wide.

Description

technical field [0001] The invention relates to the technical field of food measurement, in particular to a method for detecting material components based on pulse relaxation signal curves. Background technique [0002] Since the mid-1980s, the electronic tongue, as a rapid detection instrument, has been widely used in a series of liquid-based food detection fields including milk, tea drinks, and alcohol (including flavor distinction, true and false identification, etc.), and achieved good detection results. Among them, the research and application of the volt-ampere electronic tongue are the most widely used. [0003] The detection principle and steps of the voltammetric electronic tongue are: (1) the electronic tongue uses pulse voltage as the excitation signal of the sensor; (2) the sample to be tested generates a corresponding pulse current relaxation response signal through the sensor; (3) collects the pulse relaxation signal. A series of vertex and inflection point e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/48
Inventor 田师一邓少平鲁晓
Owner ZHEJIANG GONGSHANG UNIVERSITY
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