Colorimetric sensor array for soft drink analysis

Chen Zhang, Kenneth S. Suslick

Research output: Contribution to journalArticlepeer-review


Fourteen commercial soft drinks have been analyzed using colorimetric sensor arrays made from a set of 25 chemically responsive dyes printed on a hydrophobic membrane. Digital imaging of the dye array before and after immersion provides a color change profile as a unique fingerprint for each specific analyte. The digital data library generated was analyzed with statistical and chemometric methods, including principal component analysis (PCA) and hierarchical clustering analysis (HCA). Facile identification of all of the soft drinks was readily achieved using comparison of the color change profiles or a PCA score plot. Using a HCA dendrogram, the misclassification rate was <2%, and even very similar sodas were easily differentiated. In addition, the monitoring of soft drinks as they degas or upon dilution also proved to be possible. This work demonstrates the potential of our colorimetric sensor array technology for quality assurance/control applications of sodas and perhaps other beverages as well.

Original languageEnglish (US)
Pages (from-to)237-242
Number of pages6
JournalJournal of Agricultural and Food Chemistry
Issue number2
StatePublished - Jan 24 2007


  • Beverages
  • Chemometrics
  • Colorimetric sensor array
  • Cross-responsive sensors
  • Dyes
  • Soda
  • Soft drinks

ASJC Scopus subject areas

  • Chemistry(all)
  • Agricultural and Biological Sciences(all)


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