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Correlation between Sensory Quality and Instrumental Quality Attributes in 'Campbell Early' Grape  

Cho, Sun-Duk (Department of Food and Nutrition, Duksung Women's University)
Chang, Min-Sun (Department of Food and Nutrition, Duksung Women's University)
Kim, Dong-Man (Korea Food Research Institute)
Kim, Gun-Hee (Department of Food and Nutrition, Duksung Women's University)
Publication Information
Horticultural Science & Technology / v.28, no.4, 2010 , pp. 691-695 More about this Journal
Abstract
In order to find correlations between the sensory evaluation and instrumental analysis in 'Campbell Early' grape, grapes were divided into three parts. One-half parts were used for the sensory evaluation and the other half were used as samples for instrumental analysis. Relationship between sensory evaluation and instrumental analysis were studied through correlation study using 48-paired data set obtained during storage. Soluble solid content analysis showed that instrumental quality attributes increased along the passage of storage time with increasing temperature. pH and titratable acidity decreased slightly at lower storage temperatures. Correlations between instrumental quality attributes in grapes were found to be very low. Positive correlation was found between pH and soluble solid content, and negative correlation was found between pH and titratable acidity. The relation of sourness and sweetness to sourness was higher than other sensory evaluation factors, and the shape of the grapes was found to have little relation to their sweetness. Texture ($r^2$=0.890) was found to be the most important factor in preference, followed next by sweetness with sourness ($r^2$=0.860). The correlations between the sensory evaluation and instrumental quality attributes were found to be very low, with overall acceptability given to a relatively high content of soluble solid content. Correlations between pH and titratable acidity in terms of overall acceptability were found to be very low.
Keywords
soluble solid content; sourness; sweetness; titratable acidity;
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