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Product Product ISO 4120:2021
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Description Description

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.

Standard Number Standard Number ISO 4120:2021
Title Title ISO 4120:2021 Sensory analysis — Methodology — Triangle test
Status Status Published
Publication Date Publication Date 03 Mar 2021
Cross References Cross References
Descriptors Descriptors
ICS ICS 67.240
Committee Committee ISO/TC 34/SC 12 Sensory analysis
Publisher Publisher PECB Store
Format Format PDF
Delivery Delivery NO
Pages Pages 17
File Size File Size KB