ISO 15796:2005 煤气分析 分析偏见的调查和处理

标准编号：ISO 15796:2005

中文名称：煤气分析 分析偏见的调查和处理

英文名称：Gas analysis — Investigation and treatment of analytical bias

发布日期：2005-03

标准范围

ISO 15796:2005规定了使用参考气体混合物或参考分析程序检测和校正气体分析程序偏差（系统误差）以及估计校正不确定度的通用方法。分析方法偏差（以及影响偏差的参数）的主要来源是仪器漂移（时间）和基质干扰（基质组成）。此外，偏差通常随分析物浓度而变化。因此，ISO 15796:2005建立了检测和校正有限稳定性分析系统漂移的协议，以及调查和处理特定样品组成范围内稳定分析系统的偏差的协议。这些协议旨在单独或顺序用于方法开发和方法验证研究。ISO 15796:2005规定了适用于系统效应的两个选项的程序，如下所示:1） 追踪观察到的偏差模式并纠正其影响，2） 对其影响进行平均，增加不确定性，通常情况下，第一种选择会以更高的努力为代价降低不确定性。为了方便用户，ISO 15796:2005中规定的方法描述了成分分析程序，即:。e、 测量气体混合物中特定分析物浓度的程序。然而，它们同样适用于与气体分析相关的气体或气体混合物的物理化学性质的测量，并且直接转换到这个主题领域。

ISO 15796:2005 specifies generic methods for detecting and correcting bias (systematic errors) of analytical procedures for the analysis of gases, using reference gas mixtures or reference analytical procedures, as well as for estimating the correction uncertainty.The main sources of (and parameters affecting) bias of analytical procedures are instrumental drift (time) and matrix interferences (matrix composition). Moreover, bias normally varies with analyte concentration. ISO 15796:2005 therefore establishes protocols for detecting and correcting drift for an analytical system of limited stability, and for investigating and handling bias of a stable analytical system for a specified range of sample composition. These protocols are intended to be used in method development and method validation studies, either separately or sequentially.ISO 15796:2005 specifies procedures for two options, applicable to systematic effects, as follows:1) tracing the observed pattern of deviations and correcting for their effect,2) averaging over their effects and increasing the uncertainty,where normally the first option entails lower uncertainty at the expense of higher effort.For the convenience of the user, the methods specified in ISO 15796:2005 are described for procedures of composition analysis, i.e. procedures for measuring the concentration of a specified analyte in a gas mixture. However, they are equally applicable to measurements of physico-chemical properties of a gas or gas mixture relevant to gas analysis, and translation into this subject field is straightforward.

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