标准编号：ISO 11843-7:2018
中文名称：检测能力 第7部分：基于仪器噪声随机性的方法学
英文名称：Capability of detection — Part 7: Methodology based on stochastic properties of instrumental noise
发布日期：2018-09
标准范围
Background noise exists ubiquitously in analytical instruments, whether or not a sample is applied
to the instrument. This document is concerned with mathematical methodologies for estimating the
minimum detectable value in case that the most predominant source of measurement uncertainty is
background noise. The minimum detectable value can directly and mathematically be derived from the
stochastic characteristics of the background noise.
This document specifies basic methods to
— extract the stochastic properties of the background noise,
— use the stochastic properties to estimate the standard deviation (SD) or coefficient of variation (CV)
of the response variable, and
— calculate the minimum detectable value based on the SD or CV obtained above.
The methods described in this document are useful for checking the detection of a certain substance
by various types of measurement equipment in which the background noise of the instrumental
output predominates over the other sources of measurement uncertainty. Feasible choices are visible
and ultraviolet absorption spectrometry, atomic absorption spectrometry, atomic fluorescence
spectrometry, luminescence spectrometry, liquid chromatography and gas chromatography.
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