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Detecting Counterfeit Brandies.

Benhua Wang1, Jinsong Han1, Hao Zhang1

  • 1Organisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany.

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Summary
This summary is machine-generated.

This study introduces a novel optoelectronic tongue sensor array capable of identifying over 30 spirits, including counterfeit and different batches of brandies. The sensor array offers a cost-effective, rapid, and low-sample-volume alternative to traditional methods.

Keywords:
brandiesdifferential sensinglinear discriminant analysispoly(p-aryleneethynylene)ssensor array

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Area of Science:

  • Analytical Chemistry
  • Spectroscopy
  • Sensor Technology

Background:

  • Authenticating spirits and detecting counterfeits is crucial for consumer safety and industry integrity.
  • Conventional methods for spirit analysis are often time-consuming, require large sample volumes, and involve high instrumental costs.
  • Poly(para-aryleneethynylene)s (PAEs) exhibit unique photophysical properties suitable for sensing applications.

Purpose of the Study:

  • To develop and validate a hypothesis-free optoelectronic tongue sensor array for discriminating various spirits.
  • To assess the sensor array's capability in identifying counterfeit spirits and differentiating between batches of the same brand.
  • To demonstrate the superiority of the developed sensor array over conventional analytical techniques.

Main Methods:

  • Fabrication of a sensor array using anionic, cationic, and neutral poly(para-aryleneethynylene)s (PAEs).
  • Measurement of fluorescence quenching responses of the PAE array upon exposure to different spirit samples at pH 3, 7, and 13.
  • Analysis of fluorescence quenching data using linear discriminant analysis (LDA) and principal component analysis (PCA).

Main Results:

  • The optoelectronic tongue successfully discriminated over 30 types of spirits, including brandy, Cognac, and other spirituous beverages.
  • The sensor array effectively identified counterfeit spirits and distinguished between different batches of identical brandy brands.
  • Discrimination was achieved using minimal sample volumes (10-20 μL) with reduced time and effort compared to traditional methods.

Conclusions:

  • The developed hypothesis-free optoelectronic tongue, based on PAE fluorescence quenching, provides a rapid, cost-effective, and sensitive method for spirit authentication.
  • This sensor array technology shows significant potential for quality control and anti-counterfeiting applications in the beverage industry.
  • The method's efficiency in sample handling and analysis highlights its advantages over conventional analytical approaches.