Estimating a "consumer rejection threshold" for cork taint in white wine

Prescott, John, Norris, Leslie, Kunst, Madeleine, and Kim, Sandra (2005) Estimating a "consumer rejection threshold" for cork taint in white wine. Food Quality and Preference, 16 (4). pp. 345-349.

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Abstract

Cork taint in wine produced by 2,4,6-trichloroanisole (TCA) is characterised by generally unacceptable musty or earthy odours. Estimates of TCA threshold in wine have been reported in the low parts per trillion (ppt) range, although it is not clear at what levels TCA begins to render a wine unacceptable. We conducted two studies to address this question by using a method that combined a paired preference test with a method of constant stimuli threshold procedure. The aim was to determine the point at which wine consumers would begin to reject a wine containing TCA, which we termed the consumer rejection threshold (CRT). Regular white wine consumers (Ss) received pairs of samples of white wine––one spiked with TCA in eight ascending concentrations––and were asked to indicate which of the samples was preferred. Detection thresholds (DT) for TCA in wine were also determined using triangle tests. The CRT and DT were 3.1 and 2.1 ppt, respectively. CRT and DT were significantly positively correlated with one another, and negatively correlated with TCA knowledge. A replication provided a similar CRT value, and suggested that a percentage of consumers are either highly insensitive to TCA or do not find it objectionable. These results suggest that the use of this method may provide a rational basis on which to assess the real impact of TCA in white wine.

Item ID: 14021
Item Type: Article (Refereed Research - C1)
ISSN: 1873-6343
Date Deposited: 27 Nov 2010 02:23
FoR Codes: 17 PSYCHOLOGY AND COGNITIVE SCIENCES > 1701 Psychology > 170112 Sensory Processes, Perception and Performance @ 100%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970117 Expanding Knowledge in Psychology and Cognitive Sciences @ 100%
Citation Count from Web of Science Web of Science 42
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