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Norm
ÖNORM EN ISO 4120
Issue date: 2021 07 01
Sensory analysis - Methodology - Triangle test (ISO 4120:2021)
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-...
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Valid
Publisher:
Austrian Standards International
Format:
Digital | 23 Pages
Language:
German
| English
Optionally co-design standards:
ICS
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:
a) 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;
b) selecting, training and monitoring assessors.
Norm
ISO 8589:2007
Issue date :
2007 11 29
Sensory analysis — General guidance for the design of test rooms