Application of Sensory Evaluation Triangle Tests for Quality Control of Liquid Antacids

Abstract

AbstractThe triangle difference test was applied to detect lot to lot variations in organoleptic properties in aluminum and magnesium hydroxides antacid suspensions from 22 lots prepared in different dates, with separation from 1 to 310 days. The panelists consisted of 10 to 17 trained judges, ages 18 to 24. Random samples were presented properly codified in six possible combinations. A total of 12 triangle tests was carried out and results were analyzed by the chi-square test in three significance levels (α = 0.05, α = 0.01 and α = 0.001). No significant differences in organoleptic properties (α = 0.05) were found in lots with difference in manufacturing date from 1 to 15 days, except in one test with a three day difference. There is at least significant difference in samples whose production date differs from 60 to 310 days and the frequency of finding significant, highly significant (α = 0.01) and very highly significant (α = 0.001) differences in sensory attributes increases as the difference in produ...