GB/T 22366-2022Sensory analysis - Methodology - General guidance for measuring odour, flavour and taste detection thresholds by a three-alternative forced-choice(3-AFC)procedure (English PDF)

GB/T 22366-2022 is the English-translated version of ――检测化学物质引起感官响应的特性：主要包括下列五个方面：.

GB/T 22366-2022 is the Chinese standard "Sensory analysis - Methodology - General guidance for measuring odour, flavour and taste detection thresholds by a three-alternative forced-choice(3-AFC)procedure".

Its scope clause reads: This document presents data on olfactory, gustatory and flavor responses to stimuli measured using the three-point forced choice (3-AFC) Guided by processing threshold estimation, error estimation, and other statistical procedures related to detection.

The methods given in this document are suitable for either of the following two situations (most experiments can include both of the following situations). a) Determining the sensitivity of assessors to specific stimuli. mainly used in studies of differences in individual sensitivity among individuals or specific groups, and Effects of age, gender, physiological state, disease, drug effects and environmental conditions on sensitivity. b) Detect the characteristics of sensory responses caused by chemical substances, mainly including the following five aspects. ---Research on flavor chemistry and the influence of specific chemical substances on food flavor; --- Classify according to the impact of chemical substances present in the environment on humans; --- Research on the relationship between the molecular structure of chemical substances and their stimulating ability; ---Quality assurance of exhaust gases, water, food and beverages; ---Research on the mechanism of smell.

In the above case, since the probability of the assessor making the correct choice changes with the change of stimulus intensity, for the analysis of this change, That is to say, the analysis of the slope of the dose-response (effect) relationship curve is also an important research content besides the threshold measurement. given in this document Information on this is provided in the data processing procedure.

The core of this document is the data acquisition and calculation procedures. Regarding the validity of the data, this document only gives general rules and precautions.

In this document, no strict distinction is made between "perception threshold" and "difference threshold". In fact, the method given in this document is to determine the difference threshold, that is, by The test sample is compared to the reference sample for threshold measurement.

This document does not exclude the inclusion of stimuli in the reference sample at the time of experimental design, or the determination of the reference sample.

Whether the sample contains stimuli. The method given in this document is not applicable to the inspection of the "identification threshold" defined in ISO 5492, nor does it involve Standardized methods for air quality determination in EN13725. Its clauses include terms and definitions.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 52 pages — is available in the English PDF.

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