ISO 4120:2021

Sensory analysis -- Methodology -- Triangle test
Autor: ISO
Código ICS: 67.240


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:

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

Especificaciones de la Norma
Fecha de Publicación 03/03/2021
Título Secundario Analyse sensorielle -- Méthodologie -- Essai triangulaire
Páginas Técnicas 17
Idioma Inglés