Sensory Evaluation Test (Foods)

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PRACTICAL 2 TITLE Sensory evaluation of foods INTRODUCTION Sensory evaluation is a scientific discipline that analyses and measures human responses to the composition of food and drink. Sensory evaluation can be used to compare similarities or differences in a range of dishes or products, evaluate a range of existing food products, and analyse food samples for improvements. It can also be used to gauge responses to a product and explore specific characteristics of an ingredient or food product. Other than that, sensory evaluation can be used to check whether a final food product meets its original specification and provide objective and subjective feedback to enable informed decisions to be made. Many methods can be used for testing foods. Some are fairly simple (for the panellist) “forced choice” methods such as paired comparison or the triangle test. Others are more complex, such as ranking or rating, category scaling, magnitude estimation, or hedonic rating. OBJECTIVE To expose the students to become acquainted with a variety of sensory difference testing methods that can be used with foods. MATERIAL Apple juice solutions (prepared according to concentration) PROCEDURE 1. The test solution is apple juice to which has been added different amounts 5% citric acid. 2. An aspect of flavour which is tartness is being focused on. 3. The sample is to taste, not for drink. 4. Mouth is rinsed with water before and between tasting the samples. 5. The tasting of the samples are started from the left. PART 1: DIFFERENT TESTS A. Paired test • Simple difference: Samples 545 and 390 are identified either they are of equal tartness or different. B. Directional difference: Samples 545 and 390 are identified on which is more tart. C. Triangle or add sample test: Samples
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