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About This Item
Full Description
This International Standard 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 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 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.
Document History
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DANSK DSF/PREN ISO 4120
Sensory analysis – Methodology – Triangle test (ISO/DIS 4120:2020)- Historical Version
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DANSK DSF/FPREN ISO 4120
Sensory analysis – Methodology – Triangle test (ISO/FDIS 4120:2020)- Historical Version
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DANSK DS/EN ISO 4120
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Sensory analysis – Methodology – Triangle test (ISO 4120:2021)- Most Recent
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DANSK DS/EN ISO 4120
Sensory analysis – Methodology – Triangle test- Historical Version