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BS EN ISO 23320:2022 – TC 2023

BS EN ISO 23320:2022 – TC 2023

$246.62

Tracked Changes. Workplace air. Gases and vapours. Requirements for evaluation of measuring procedures using diffusive samplers

Published By Publication Date Number of Pages
BSI 2023 112
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This document specifies performance requirements and test methods under prescribed laboratory conditions for the evaluation of diffusive samplers (see Reference [1]) and of procedures using these samplers for the determination of gases and vapours in workplace atmospheres (see Reference [2]). This document is applicable to diffusive samplers and measuring procedures using these samplers, such as ISO 16200?2 and ISO 16017?2, in which sampling and analysis are carried out in separate stages. This document is not applicable to —    diffusive samplers which are used for the direct determination of concentrations, and —    diffusive samplers which rely on sorption into a liquid. This document addresses requirements for method developers and/or manufacturers. NOTE      For the purposes of this document a manufacturer can be any commercial or non-commercial entity.

PDF Catalog

PDF Pages PDF Title
66 National foreword
70 Foreword
71 Introduction
73 1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
75 5 Types of samplers
6 Requirements
6.1 General
6.2 Sampler requirements
6.2.1 Nominal uptake rate
6.2.2 Air velocity/sampler orientation
76 6.2.3 Sampler leak test
6.2.4 Shelf life
6.2.5 Sampler identification (for commercially available diffusive samplers)
6.2.6 Marking
6.2.7 Instructions for use
77 6.3 Measuring procedure requirements
6.3.1 Sampling procedure requirements
6.3.2 Analytical procedure requirements
78 6.3.3 Expanded uncertainty
6.3.4 Method description
79 7 General test conditions
7.1 Reagents
7.2 Apparatus
7.3 Independent method
80 7.4 Generation of a calibration gas mixture
7.4.1 General
7.4.2 Determination of mass concentration
81 8 Test methods
8.1 General
8.2 Sampler test methods
8.2.1 Determination of (nominal) uptake rate
82 8.2.2 Air velocity
83 8.2.3 Sampler leak test
8.2.4 Shelf life (for Type A impregnated supports)
84 8.2.5 Sampler identification
8.2.6 Marking
8.2.7 Instructions for use
8.3 Measuring procedure test methods
8.3.1 Determination of the sampling conditions
85 8.3.2 Analytical procedure test methods
87 8.3.3 Method recovery and method precision
89 8.4 Uncertainty of measurement
8.4.1 Identification of random and non-random uncertainty components
8.4.2 Estimation of individual uncertainty components
90 8.4.3 Calculation of expanded uncertainty
91 9 Test report
92 Annex A (informative) Fundamentals of diffusive sampling
94 Annex B (informative) Estimation of uncertainty of measurement
104 Annex C (informative) Calculation of uptakes rates from diffusion coefficients
106 Annex D (informative) Example of estimation of expanded uncertainty
109 Bibliography

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BS EN ISO 23320:2022 - TC 2023
$246.62