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Alcohol determination using an acoustic wave sensor.

M T Gomes1, M I Veríssimo, J A Oliveira

  • 1Department of Chemistry, University of Aveiro, Portugal. mtgomes@dq.ua.pt

Fresenius' Journal of Analytical Chemistry
|May 24, 2001
PubMed
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A new acoustic wave method accurately quantifies ethanol in aqueous solutions and wine. This technique offers comparable precision and accuracy to traditional methods for alcohol analysis.

Area of Science:

  • Analytical Chemistry
  • Physical Chemistry

Background:

  • Accurate quantification of alcohols in aqueous solutions is crucial for various industries, including food and beverage.
  • Traditional methods for alcohol determination can be time-consuming or require specific calibration.

Purpose of the Study:

  • To develop and validate a novel acoustic wave-based methodology for quantifying alcohols in aqueous solutions.
  • To assess the suitability of this method for determining ethanol content in white wines.

Main Methods:

  • Utilized an acoustic wave methodology based on the frequency at minimum impedance of a bare quartz crystal.
  • Applied the method to analyze ethanol in various Portuguese white wine samples.
  • Compared results with the standard areometric method.

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Main Results:

  • The frequency at minimum impedance proved to be a reliable parameter for ethanol quantification.
  • Analysis of ethanol in white wines showed no statistically significant differences compared to the areometric method.
  • The proposed acoustic wave method demonstrated comparable precision and accuracy to established techniques.

Conclusions:

  • The developed acoustic wave methodology is a viable and accurate approach for quantifying ethanol in aqueous solutions and wine.
  • This method offers a potentially faster and simpler alternative for alcohol content determination.
  • Further research could explore its application in other alcoholic beverages and complex matrices.