Sensory analysis - Methodology - Duo-trio test (ISO 10399:2004)
感官分析 - 方法 - 双重测试(ISO 10399:2004)
发布日期:
2010-02-24
废止日期:
2018-01-24
ISO 10399:2004描述了一种用于确定两种产品的样品之间是否存在感知差异或相似性的程序。该方法是强制选择过程。该方法适用于是否存在单个感觉属性或几个属性中的差异。
该方法在统计学上比三角测试的效率更低,但是评估者更容易执行。
该方法即使当差异的性质是未知的(即既不确定样本之间的大小也不确定差异的方向,也不负责该差异的属性的任何指示)时也是可应用的。该方法仅适用于产品相当均匀的情况。
该方法对于a)确定当例如在成分中进行变化时,确定感知差异结果(差异的二重奏测试)或不可观察到的差异(相似性的二重奏测试)加工,包装,处理或储存;或b)选择,培训和监督评估员。
描述了两种形式的方法:当一个产品熟悉评估者(例如常规生产的样品)时使用的常数参考技术和当一个产品不是时使用的平衡参考技术
ISO 10399:2004 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 less efficient than the triangle test but is easier to perform by the assessors.
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 attributes 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 (duo-trio testing for difference), or a perceptible difference does not result (duo-trio testing for similarity) when, for example, a change is made in ingredients, processing, packaging, handling or storage; or b) for selecting, training and monitoring assessors.
Two forms of the method are described: the constant-reference technique, used when one product is familiar to the assessors (e.g. a sample from regular production), and the balanced-reference technique, used when one product is not more familiar than the other.