Colorimetric sensor arrays for the analysis of beers: A feasibility study

Chen Zhang, Daniel P. Bailey, Kenneth S. Suslick

Research output: Contribution to journalArticlepeer-review


Eighteen commercial beers have been analyzed in both liquid and gas phases using colorimetric sensor arrays made from selected chemically responsive dyes printed on a hydrophobic membrane. Digital imaging of the dye array before and after exposure to the complex analytes in either the liquid phase or the head-gas provides a color change profile as a unique fingerprint for the specific analyte. The digital data libraries generated were analyzed using statistical and chemometric methods, including principal component analysis (PCA) and hierarchical clustering analysis (HCA). In either liquid- or gas-phase experiments, facile identification of specific beers was achieved using comparison of the color change profiles; using HCA statistical analysis the error rate of identification was <3%. Differentiation between even very similar beers proved to be straightforward. In addition, differentiation of pristine beer from the effects of watering or decarbonation proved to be possible. These results suggest that colorimetric sensor arrays may prove to be useful for quality assurance/quality control applications of beers and perhaps other beverages.

Original languageEnglish (US)
Pages (from-to)4925-4931
Number of pages7
JournalJournal of Agricultural and Food Chemistry
Issue number14
StatePublished - Jul 12 2006


  • Beers
  • Beverages
  • Chemometrics
  • Colorimetric sensor array
  • Cross-responsive dyes
  • Food

ASJC Scopus subject areas

  • General Chemistry
  • General Agricultural and Biological Sciences


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