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BS ISO 24095:2021 – TC

BS ISO 24095:2021 – TC

$258.95

Tracked Changes. Workplace air. Guidance for the measurement of respirable crystalline silica

Published By Publication Date Number of Pages
BSI 2021 118
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This document gives guidelines for the measurements of respirable crystalline silica in air using direct on?filter or indirect X?ray diffraction and infrared analysis methods, including quality aspects of the measurements. The scope of this document includes the following crystalline silica polymorphs: quartz and cristobalite.

These guidelines are intended for use in conjunction with the following specific analytical methods under the jurisdiction of ISO TC 146 SC 2: ISO 16258-1 , ISO 16258-2 , and ISO 19087 . When used with any of these documents, this guidance will help to ensure measurement procedures meet the uncertainty requirements stipulated in ISO 20581 , to enable the results to be compared to occupational exposure limit values (OELV) in accordance with EN 689 [ 40 ].

These guidelines are also relevant to the analysis of filters obtained from dustiness measurements in accordance with EN 15051 [ 1 ] and EN 17289 [ 35 ].

PDF Catalog

PDF Pages PDF Title
68 National foreword
72 Foreword
73 Introduction
75 1 Scope
2 Normative references
3 Terms and definitions
76 4 Principle
77 5 Analytical quality requirements
6 Administrative controls
78 7 Sampling
7.1 General
7.2 Sampler
7.3 Filters and foams
79 7.4 Sampling flow measurement devices and pumps
7.5 Sampling period
80 7.6 Transportation
81 8 Procedures
8.1 Handling of filter cassettes
8.2 Method validation
8.3 Calibration
82 8.4 Sample preparation
83 8.5 Sample measurement
8.5.1 Limit of Detection
8.5.2 X‑ray diffraction
8.5.3 Infrared analysis
84 8.6 Instrumental variation
8.6.1 X‑ray diffraction
8.6.2 Infrared analysis
9 Internal quality control
85 10 External verification and assessment of uncertainty
11 Test report
11.1 Minimum report requirements
86 11.2 Data to be archived by the laboratory
87 Annex A (informative) Polymorphs of crystalline silica and their interferences
92 Annex B (informative) The quantification of cristobalite using X-ray diffraction
96 Annex C (informative) Example of quality control charting for respirable crystalline silica
98 Annex D (informative) Estimation of expanded uncertainty for measurements of respirable crystalline silica
107 Annex E (informative) Differences between samplers (cyclones and other types)
109 Annex F (informative) Use of proficiency test data to evaluate the performance of XRD and IR methods in the presence of interferences
114 Bibliography

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BS ISO 24095:2021 - TC
$258.95