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BS EN ISO 4120:2021

BS EN ISO 4120:2021

$142.49

Sensory analysis. Methodology. Triangle test

Published By Publication Date Number of Pages
BSI 2021 24
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This document specifies a procedure for determining whether a perceptible sensory difference or similarity exists between samples of two products. The method is a forced-choice procedure. The method is applicable whether a difference exists in a single sensory attribute or in several attributes.

The method is statistically more efficient than the duo-trio test (described in ISO 10399), but has limited use with products that exhibit strong carryover and/or lingering flavours.

The method is applicable even when the nature of the difference is unknown [i.e. it determines neither the size nor the direction of difference between samples, nor is there any indication of the attribute(s) responsible for the difference]. The method is applicable only if the products are homogeneous.

The method is effective for:

  1. determining that:

    1. either a perceptible difference results (triangle testing for difference);

    2. a perceptible difference does not result (triangle testing for similarity),

    when, for example, a change is made in ingredients, processing, packaging, handling or storage;

  2. selecting, training and monitoring assessors.

PDF Catalog

PDF Pages PDF Title
2 National foreword
4 European foreword
6 Foreword
7 1 Scope
2 Normative references
3 Terms and definitions
8 4 Principle
5 General test conditions and requirements
9 6 Assessors
6.1 Qualification
6.2 Number of assessors
10 7 Procedure
8 Analysis and interpretation of results
8.1 When testing for a difference
11 8.2 When testing for similarity
9 Test report
10 Precision and bias
13 Annex A (normative) Tables
18 Annex B (informative) Examples
23 Bibliography

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BS EN ISO 4120:2021
$142.49