Refreshing is a multidimensional concept for the response
to a
food consumption experience, especially for drinks. The consumer has
daily needs for refreshing; however, the perception of refreshing
and the associated food sensory quality and molecule composition are
underexplored. This study aimed to (1) use a consumer study to evaluate
the refreshing perception of eight cucumber varieties, (2) identify
volatile aroma and nonvolatile taste compounds in cucumber with instrumental
analysis, and (3) explore the potential correlation between refreshing
perception and aroma- and taste-related compounds using statistical
analysis. The cucumber consumer study (n = 103) showed
that cucumbers were perceived as refreshing in general (intensities
3.3–5.4, 0–10 line scale). The analysis of volatiles
with solid-phase microextraction–gas chromatography–mass
spectrometry (SPME-GC-MS) identified 155 volatiles. Aldehydes and
alcohols were the most dominant, accounting for 25.5%–77.9%
and 15.0%–58.1%, respectively. Soluble solids and three organic
acids were quantified in the eight cucumber varieties using a refractometer
and high-performance liquid chromatography (HPLC), respectively. Cucumber
variety differences in these variables (volatiles, organic acids,
and soluble solids) were significant (p ≤
0.05). Compounds associated with refreshing perception were investigated
using partial least-squares (PLS) regression, and refreshing perception
was highly correlated with aldehydes (mainly C6 and C9 aldehydes),
organic acid, and soluble solids. The findings would bring in a new
potential use of cucumber, especially when the food industry is interested
in developing products perceived as refreshing with natural flavorings.