DS/ISO 4120:2021

Sensory analysis – Methodology – Triangle test


Status:
Current
Type:
Standard
Language:
English
Subject:
Price from:
€ 61.05

Scope

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.

Number of pages: 24

Published: 2021-03-24

Date of approval: 2021-03-22

International relationships : ISO 4120:2021 IDT

ICS: 67.240 - Sensory analysis

Item number: M341679


Committees

Committee

  • ISO/TC 34/SC 12

Danish committee

DS/S-291