Análise sensorial e avaliação da qualidade interna e externa de ovos caipiras e comerciais
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This study aimed to evaluate the internal and external quality of free-range and commercial eggs and consumer preferences between the two types of eggs, using affective sensory tests. The hedonic scale was used to sensory analyze the eggs based on their general appearance, aroma, texture, flavor, and yolk color. Consumer preferences between free-range and commercial eggs were also assessed using a paired comparison test. The tests were performed under red light to mask the yolk color and under white light to assess its visual influence. Participants for the sensory analysis were randomly selected by administering a social profile questionnaire to 231 faculty, staff, and students at the IFMG Bambuí Campus. The results from the questionnaire were analyzed using descriptive analysis. A randomized, balanced block design was used for the sensory analysis, with each taster representing a separate block. Data from the hedonic test and paired comparisons were analyzed using R statistical software (THE R FOUNDATION, 2025), using the Wilcoxon Mann-Whitney test for independent samples and the chi-square test, respectively. Under red light, there were no significant differences in the attributes of overall appearance, aroma, texture, or flavor between freerange and commercial eggs. Under white light, only yolk color showed a statistically significant difference (p < 0.01), with a higher mean for free-range eggs (mean 7.72; SD 1.34; CV 17%) compared to commercial eggs (mean 5.74; SD 1.97; CV 34%). In the paired comparison test, free-range eggs were preferred by 66% of the tasters (p < 0.05). The internal and external quality data were subjected to analysis of variance (ANAVA) using SISVAR software. A significant difference was observed for yolk color (p < 0.01), with greater intensity in free-range eggs, and for Haugh Unit (p < 0.05), with higher values in commercial eggs. For the other parameters (yolk index, shell percentage and thickness, yolk percentage, albumen percentage, specific gravity, and egg weight), there was no statistically significant difference (p > 0.05).
