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Updated: Jun 25, 2026

Fruit Volatile Analysis Using an Electronic Nose
Published on: March 30, 2012
Fresh cucumber flavor in refrigerated pickles: comparison of sensory and instrumental analysis
Cheryl Palma-Harris1, Roger F McFeeters, Henry P Fleming
1Agricultural Research Service, U.S. Department of Agriculture, and North Carolina State University, Raleigh, North Carolina 27695-7624, USA.
Abstract:
The ability of nonacidified, refrigerated pickled cucumbers to produce the fresh cucumber flavor impact compounds (E,Z)-2,6-nonadienal and (E)-2-nonenal declined during storage. Production of these compounds decreased as the pH of refrigerated cucumbers was reduced. Despite the fact that the concentrations of (E,Z)-2,6-nonadienal and (E)-2-nonenal generated were over 10(5)-fold greater than the threshold levels, it was possible for a sensory panel to consistently detect differences in the intensity of fresh cucumber flavor, provided the pH difference between samples was 1 unit or greater. The presence of spices did not interfere with the ability of panelists to detect differences in fresh flavor intensity. There was a linear correlation between sensory scores and the amount of (E,Z)-2,6-nonadienal produced by cucumbers equilibrated at different pH levels.
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