Sensory analysis of individual strawberry fruit and comparison with instrumental analysis

• Published in: Postharvest biology and technology Vol. 52; no. 2; pp. 164 - 172
• Main Authors: Gunness, Purnima, Kravchuk, Olena, Nottingham, Stephen M., D’Arcy, Bruce R., Gidley, Michael J.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 01.05.2009; Amsterdam; New York: Elsevier; Elsevier
• Subjects: Biological and medical sciences; Biophysical analysis; color; firmness; flavor; Flavour volatiles; Food industries; Fragaria; Fragaria ananassa Duch; Fruit and vegetable industries; fruit pulp; Fruit-to-fruit variation; Fundamental and applied biological sciences. Psychology; harvest date; headspace analysis; instrumental properties; measurement; odors; pureed foods; quantitative analysis; Sensory analysis; sensory properties; soluble solids; strawberries; titratable acidity; Variance components analysis; volatile compounds; Flavour volatiles; Fragaria ananassa Duch; Sensory analysis; Variance components analysis; Biophysical analysis; Fruit-to-fruit variation; Volatile compound; Fruit; Rosaceae; Fragaria ananassa; Biophysics; Variance analysis; Flavor; Dicotyledones; Strawberry; Angiospermae; Spermatophyta; Variance component; Comparative study
• ISSN: 0925-5214; 1873-2356
• DOI: 10.1016/j.postharvbio.2008.11.006

A new method for measuring fruit-to-fruit variation in strawberries by both sensory and instrumental analyses was developed and applied. The method allowed quantification of fruit-to-fruit variation in sensory attributes and instrumental properties. Two commercial colour gradings (3/4 and 4/4 red) of strawberry commonly used at harvest were investigated. In the main experiment, one-half of a strawberry fruit was assessed for sensory characteristics by a trained panel while the other half was concurrently individually evaluated for soluble solids content (SSC), pH, titratable acidity (TA), firmness, and headspace volatile composition. The sensory evaluation was additionally performed on a bulk purée of fruit from the same harvest and the results were compared with the sensory evaluation on individual fruit. This study suggests that fruit-to-fruit variation is substantial in SSC, TA and fruit firmness and sensory characteristics such as ‘fruity odour’, ‘sweet flavour’ and ‘flavour aftertaste’, whereas other characteristics show similar variation among panellists for both individual fruit and bulk purée analyses. Further, individual fruit flavour characteristics were correlated with fruit biophysical properties. The results obtained are specific to this study and further investigations need to be undertaken to validate this method as a model for fruit-to-fruit variation in small fruit.