BS EN ISO 11929-1:2021由英国标准学会 GB-BSI 发布于 2021-02-28,并于 2021-02-28 实施。
BS EN ISO 11929-1:2021在国际标准分类中归属于: 17.240 辐射测量。
BS EN ISO 11929-1:2021 确定电离辐射测量的特征限值(判定阈值、检测限值和覆盖间隔限值) 基础知识和应用 基本应用的最新版本是哪一版?
最新版本是 BS EN ISO 11929-1:2021 。
1 Scope The ISO 11929 series specifies a procedure, in the field of ionizing radiation metrology, for the calculation of the “ decision threshold ”, the “ detection limit ” and the “ limits of the coverage interval ” for a non-negative ionizing radiation measurand when counting measurements with preselection of time or counts are carried out. The measurand results from a gross count rate and a background count rate as well as from further quantities on the basis of a model of the evaluation. In particular, the measurand can be the net count rate as the difference of the gross count rate and the background count rate, or the net activity of a sample. It can also be influenced by calibration of the measuring system, by sample treatment and by other factors. ISO 11929 has been divided into four parts covering elementary applications in this document, advanced applications on the basis of the ISO/IEC Guide 3‑1 in ISO 11929‑2, applications to unfolding methods in ISO 11929‑3, and guidance to the application in ISO 11929‑4. This document covers basic applications of counting measurements frequently used in the field of ionizing radiation metrology. It is restricted to applications for which the uncertainties can be evaluated on the basis of the ISO/IEC Guide 98‑3 (JCGM 2008). In Annex A, the special case of repeated counting measurements with random influences is covered, while measurements with linear analogous ratemeters are covered in Annex B. ISO 11929‑2 extends the former ISO 1192...
BS EN ISO 11929-1:2021 是基于 EN ISO 11929-1 的发版本。
据编制组介绍,经过多次专家讨论,确定了制定车内空气控制物质的3条基本原则:能够在车内空气中检测到;对人体健康影响较大,尤其应严格控制致癌性物质;确认是由车辆内饰件挥发出来的物质。 ...
据编制组介绍,经过多次专家讨论,确定了制定车内空气控制物质的3条基本原则:能够在车内空气中检测到;对人体健康影响较大,尤其应严格控制致癌性物质;确认是由车辆内饰件挥发出来的物质。 ...
4.应用于新方法的研究和方法确认: 在方法研究中,检出限是一个与灵敏度、准确度、线性、干扰等同样重要的指标,ISO/IEC 17025 在方法确认中要求确认的参数包括结果的不确定度、检出限、方法的选择性、线性、重复性限和/或复现性限、抵御外来影响的稳健度和/或抵御来自样品(或检测物)母体干扰的交互灵敏度等。...
1.4 校准结果的符合性判定对校准结果进行符合性判定时,实验室应将其开展项目的检测和校准方法对设备的要求和使用需求作为判定依据,判定方法可参考 JJF 1094《测量仪器特性评定》或RB/T 197《检测和校准结果及与规范符合性的报告指南》。...
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