ISO 4120-2004 感官分析.方法学.三角试验

标准号：ISO 4120-2004
中文标准名称：感官分析.方法学.三角试验
英文标准名称：Sensory analysis - Methodology - Triangle test
标准类型：X04
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：X04
国际标准分类号：67.240
适用范围：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.