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An artificial taste sensor based on conducting polymers.

A Riul Júnior1, R R Malmegrim, F J Fonseca

  • 1EMBRAPA Instrumentação Agropecuária, CP 741, CEP 13560-970 São Carlos, SP, Brazil.

Biosensors & Bioelectronics
|August 5, 2003
PubMed
Summary

This study introduces an electronic tongue using nanostructured conducting polymer films for sensitive detection of contaminants and tastants. The sensor mimics biological systems, distinguishing beverage brands and types with high accuracy.

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Area of Science:

  • Materials Science
  • Analytical Chemistry
  • Sensor Technology

Background:

  • Electronic tongues offer advanced chemical sensing capabilities.
  • Nanostructured conducting polymers provide unique material properties for sensor development.

Purpose of the Study:

  • To develop an electronic tongue utilizing nanostructured conducting polymer films.
  • To assess the sensor's ability to detect trace contaminants and mimic biological taste perception.
  • To demonstrate beverage discrimination capabilities.

Main Methods:

  • Fabrication of pure and composite nanostructured conducting polymer films.
  • Signal transduction using impedance spectroscopy over a 10-1 MHz frequency range.
  • Testing with tastants, inorganic contaminants, and commercial beverages.

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Main Results:

  • Detection of trace amounts of tastants and inorganic contaminants in liquid systems.
  • Observation of sweetness suppressing sourness, similar to biological systems.
  • Successful discrimination of commercial beverage brands, including waters, tastants, and wines.

Conclusions:

  • Nanostructured conducting polymer films are effective sensing units for electronic tongues.
  • The developed sensor offers high sensitivity and selectivity for liquid analysis.
  • The electronic tongue system shows potential for real-world applications in beverage analysis and quality control.