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BS EN ISO 23320:2022

BS EN ISO 23320:2022

$189.07

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

Published By Publication Date Number of Pages
BSI 2022 48
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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 ā€”    diffusive samplers which are used for the direct determination of concentrations, and ā€”    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
2 National foreword
6 Foreword
7 Introduction
9 1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
11 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
12 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
13 6.3 Measuring procedure requirements
6.3.1 Sampling procedure requirements
6.3.2 Analytical procedure requirements
14 6.3.3 Expanded uncertainty
6.3.4 Method description
15 7 General test conditions
7.1 Reagents
7.2 Apparatus
7.3 Independent method
16 7.4 Generation of a calibration gas mixture
7.4.1 General
7.4.2 Determination of mass concentration
17 8 Test methods
8.1 General
8.2 Sampler test methods
8.2.1 Determination of (nominal) uptake rate
18 8.2.2 Air velocity
19 8.2.3 Sampler leak test
8.2.4 Shelf life (for Type A impregnated supports)
20 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
21 8.3.2 Analytical procedure test methods
23 8.3.3 Method recovery and method precision
25 8.4 Uncertainty of measurement
8.4.1 Identification of random and non-random uncertainty components
8.4.2 Estimation of individual uncertainty components
26 8.4.3 Calculation of expanded uncertainty
27 9 Test report
28 Annex A (informative) Fundamentals of diffusive sampling
30 Annex B (informative) Estimation of uncertainty of measurement
40 Annex C (informative) Calculation of uptakes rates from diffusion coefficients
42 Annex D (informative) Example of estimation of expanded uncertainty
45 Bibliography

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BS EN ISO 23320:2022
$189.07