GB/T 17321-2012 in English

《GB/T 17321-2012感官分析方法 二-三点检验》由326（农业农村部）归口，主管部门为农业农村部。

Scope

This International Standard specifies procedures for determining whether there is a perceivable sensory difference or similarity between samples of two products. The standard method is a forced choice procedure. This standard applies to differences in single or several sensory characteristics. This standard is also applicable when the differential properties are unknown (ie it is not certain how much or how much the samples differ, nor is there any indication of any differential properties). This standard applies only when the products are fairly similar. This standard applies to the following situations: a) Determination - there is a sensory difference (two-three point test for difference); no sensory difference (two-three point test for similarity); for example, when ingredients, processes, packaging, handling or storage When there is a change. b) Two forms of this standard method for selection, training and testing of assessors: - constant reference technique, used when the assessor is familiar with a product (e.g. samples from a fixed production line); - balanced reference technique, Used when the reviewer is no more familiar with one product than another. The statistical validity of this standard is lower than that of the three-point test (see GB/T 12311), but it is easier for the evaluators to implement.