ISO/TS 23471:2022 不确定度评估的实验设计 确定不确定度函数的析因设计的使用

标准编号：ISO/TS 23471:2022

中文名称：不确定度评估的实验设计 确定不确定度函数的析因设计的使用

英文名称：Experimental designs for evaluation of uncertainty — Use of factorial designs for determining uncertainty functions

发布日期：2022-11

标准范围

本文件规定了在满足以下条件的情况下测定测量不确定度的实验程序和统计分析:条件1:被测物的水平为非负，例如样品中污染物的浓度水平。条件2:测量误差由两个独立的分量组成:对于其中一个分量，相对标准偏差是恒定的（即，绝对偏差与被测物的水平成正比），而对于另一个分量来说，绝对标准偏差是常量（即，独立于被测物水平）。条件3:可提供不同被测水平的样品；如果被测物的浓度是化学物质的浓度，则可以通过强化（加标）空白样品来获得样品。对于仪器化学分析的大多数应用，满足条件1和2。如果有空白样品，化学分析可满足条件3。本文件还可用于确定特定实验室在一定时间内针对不同技术人员、不同环境条件、相同或类似测试项目以及相同水平的被测对象的精度数据。

This document specifies experimental procedures and statistical analysis for the determination of measurement uncertainty in situations where the following conditions are fulfilled:Condition 1: The level of the measurand is non-negative, e.g. concentration level of a contaminant in a sample.Condition 2: Measurement error consists of two independent components: for one of these components the relative standard deviation is constant (that is, the absolute deviation is proportional to the level of the measurand), whereas for the other component the absolute standard deviation is constant (that is, independent of the level of the measurand).Condition 3: Samples for different levels of the measurand can be made available; if the level of the measurand is the concentration of a chemical substance, samples could be obtained e.g. by fortifying (spiking) blank samples.Conditions 1 and 2 are met for most applications of instrumental chemical analyses. Condition 3 can be met for chemical analyses if blank samples are available.This document can also be used to determine precision data for a particular laboratory for different technicians, different environmental conditions, the same or similar test items, with the same level of the measurand, over a certain period of time.

标准预览图