ISO 4120:2021
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ISO 4120:2021
76666
недоступно на русском языке

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.


Общая информация 

  •  :  Published
     : 2021-03
  •  : 3
  •  : ISO/TC 34/SC 12 Sensory analysis
  •  :
    67.240 Sensory analysis

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