EN ISO 4120:2007

Sensory analysis - Methodology - Triangle test (ISO 4120:2004) EN ISO 4120:2007

Publication date:   Mar 28, 2008

General information

99.60 Withdrawal effective   Mar 17, 2021

CEN

CEN/BT

European Norm

67.240   Sensory analysis

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Scope

ISO 4120:2004 describes 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 applies whether a difference can exist in a single sensory attribute or in several attributes.
The method is statistically more efficient than the duo-trio test, 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 attributes responsible for the difference). The method is applicable only if the products are fairly homogeneous.
The method is effective for a) determining that either a perceptible difference results (triangle testing for difference), or 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) or for selecting, training and monitoring assessors.

Life cycle

NOW

WITHDRAWN
EN ISO 4120:2007
99.60 Withdrawal effective
Mar 17, 2021

REVISED BY

PUBLISHED
EN ISO 4120:2021

Relations

Adopted from ISO 4120:2004 IDENTICAL