Method for identifying cigarettes by using electrochemical fingerprints

A fingerprint and electrochemical technology, applied in the field of tobacco identification, can solve the problems of complex spectra, expensive instruments, difficult operation, etc., and achieve the effect of simple sample processing, accurate and reliable results, and simple and convenient operation

Inactive Publication Date: 2013-04-17
SOUTHWEST UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for cigarette products with a high degree of counterfeiting, these methods have certain limitations and are less reliable
In addition, in recent years, it has been reported that using infrared, chromatography or mass spectrometry to identify cigarettes, but infrared spectroscopy cannot reflect the characteristics of trace components, the reprodu

Method used

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  • Method for identifying cigarettes by using electrochemical fingerprints
  • Method for identifying cigarettes by using electrochemical fingerprints
  • Method for identifying cigarettes by using electrochemical fingerprints

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The method for identifying cigarette varieties by using electrochemical fingerprints, comprising the steps of:

[0028] A. Preparation of Cigarette Samples

[0029] Take the shredded tobacco of Longfeng Chengxiang (soft Charm Chaotianmen), Jiaozi (soft Sunshine) and Zhonghua (hard) respectively, and dry it for 30 minutes at a temperature of 110°C. After cooling, add 50mL extract to 1g of shredded tobacco, and stir 15 minutes, then filter with gauze, collect the filtrate, get the standard sample, wherein the extract is the concentration of 0.5mol / L H 2 SO 4 ;

[0030] B. Obtaining Fingerprints

[0031] Take 8.00 mL of the standard sample obtained in step A and add it to the B-Z oscillating system, control the solution temperature at 37.00±0.05°C, use a platinum electrode as the indicator electrode, and a double-salt bridge saturated calomel electrode as the reference electrode, and obtain the potential change curve with time. That is, to obtain the electrochemical fi...

Embodiment 2

[0038] The method for identifying cigarette varieties by using electrochemical fingerprints, comprising the steps of:

[0039] A. Preparation of Cigarette Samples

[0040] Take the shredded tobacco of Zhenzhonghua (hard), Taijian Zhonghua (hard) Ⅰ and Taijian Zhonghua (hard) Ⅱ respectively, and dry it for 30 minutes at a temperature of 110°C. After cooling, add 50mL of extracting solution to 1g of shredded tobacco, and stir. After 15 minutes, filter with gauze and collect the filtrate to obtain the standard sample of Zhonghua (hard), the sample of Zhonghua (hard) I and the sample of Zhonghua (hard) II to be identified, wherein the extract is 0.5mol / L H 2 SO 4 ;

[0041] B. Acquisition of Fingerprints

[0042] Take 8.00 mL of the standard sample and the sample to be identified from step A respectively and add them to the B-Z oscillation system. The change curve of time, that is, to obtain the electrochemical fingerprints of the standard sample and the sample to be identifie...

Embodiment 3

[0049] The method for identifying cigarette varieties by using electrochemical fingerprints, comprising the steps of:

[0050] A. Preparation of Cigarette Samples

[0051] Cut tobacco from Longfeng Chengxiang (soft charm Chaotianmen), Jiaozi (soft sunshine), Zhonghua (hard), Taijian Zhonghua (hard) Ⅰ and Taijian Zhonghua (hard) Ⅱ cigarettes were respectively taken, and the temperature was 60°C , dried for 60 minutes, after cooling, add 10mL extract to 1g shredded tobacco, stir for 5 minutes, then filter with gauze, collect the filtrate, and obtain the standard sample of Longfeng Chengxiang (soft charm Chaotianmen), Jiaozi (soft sunshine), standard sample of Zhonghua (Hard) standard sample, Zhonghua (hard) I sample and Zhonghua (hard) II sample, in which the extract is H with a concentration of 0.2mol / L 2 SO 4 ;

[0052] B. Obtaining Fingerprints

[0053] Take 10mL of the standard sample obtained in step A and add it to the B-Z oscillation system. Under the condition of tem...

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Abstract

The invention relates to a method for identifying cigarettes by using electrochemical fingerprints. The method comprises the steps that cut tobacco of cigarettes of different varieties and cigarettes to be identified are taken respectively, dried and cooled, and then are stirred by adding an extracting solution inside and filtered, and the filtrate is collected, or the filtered cut tobacco is cooled and then ground into powders to obtain a standard sample and a sample to be identified; then an appropriate amount of the standard sample or the sample to be identified is taken and added into a B-Z oscillating system with a constant temperature, and the electrochemical fingerprints are obtained with a platinum electrode as the indicating electrode and a double salt bridge saturated calomel electrode or Ag/AgCl electrode as the reference electrode; and the characteristic parameters of the standard sample and the sample to be identified are extracted according to the electrochemical fingerprints, and the category or the genuine or whether the counterfeit of the sample to be identified is a counterfeit is identified by using such as pattern recognition methods as an artificial neural network. With the method of the invention, the treatment of samples is simple, the cost is low, the identification speed is fast, the operation is simple and convenient, and the results are accurate and reliable; and the method can be used for identifying the varieties and whether the cigarette is a counterfeit.

Description

technical field [0001] The invention relates to the field of tobacco identification, in particular to a method for identifying cigarettes using electrochemical fingerprints. Background technique [0002] my country is a big cigarette producing country with many brands, high output and large sales volume. Although the state has taken various measures to continuously strengthen the management of tobacco monopoly, there are still many counterfeit and shoddy products in the market, seriously damaging the interests of the state, enterprises and consumers. At present, cigarette authenticity identification, as an important technical support for the tobacco industry's fight against smuggling and counterfeiting and monopoly management, has become the main task faced by provincial tobacco quality inspection agencies. At present, the authenticity of cigarettes is firstly tested by sensory identification, but the identification is based on sensory methods such as observing the outer pa...

Claims

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Application Information

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IPC IPC(8): G01N27/26
Inventor 张明晓陈雯李永玲李聪
Owner SOUTHWEST UNIVERSITY
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