ISO 24095:2021
Workplace air — Guidance for the measurement of respirable crystalline silica
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Analytical quality requirements
6 Administrative controls
7 Sampling
7.1 General
7.2 Sampler
7.3 Filters and foams
7.4 Sampling flow measurement devices and pumps
7.5 Sampling period
7.6 Transportation
8 Procedures
8.1 Handling of filter cassettes
8.2 Method validation
8.3 Calibration
8.4 Sample preparation
8.5 Sample measurement
8.5.1 Limit of Detection
8.5.2 X‑ray diffraction
8.5.3 Infrared analysis
8.6 Instrumental variation
8.6.1 X‑ray diffraction
8.6.2 Infrared analysis
9 Internal quality control
10 External verification and assessment of uncertainty
11 Test report
11.1 Minimum report requirements
11.2 Data to be archived by the laboratory
Annex A (informative) Polymorphs of crystalline silica and their interferences
Annex B (informative) The quantification of cristobalite using X-ray diffraction
Annex C (informative) Example of quality control charting for respirable crystalline silica
Annex D (informative) Estimation of expanded uncertainty for measurements of respirable crystalline silica
Annex E (informative) Differences between samplers (cyclones and other types)
Annex F (informative) Use of proficiency test data to evaluate the performance of XRD and IR methods in the presence of interferences
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Analytical quality requirements
6 Administrative controls
7 Sampling
7.1 General
7.2 Sampler
7.3 Filters and foams
7.4 Sampling flow measurement devices and pumps
7.5 Sampling period
7.6 Transportation
8 Procedures
8.1 Handling of filter cassettes
8.2 Method validation
8.3 Calibration
8.4 Sample preparation
8.5 Sample measurement
8.5.1 Limit of Detection
8.5.2 X‑ray diffraction
8.5.3 Infrared analysis
8.6 Instrumental variation
8.6.1 X‑ray diffraction
8.6.2 Infrared analysis
9 Internal quality control
10 External verification and assessment of uncertainty
11 Test report
11.1 Minimum report requirements
11.2 Data to be archived by the laboratory
Annex A (informative) Polymorphs of crystalline silica and their interferences
Annex B (informative) The quantification of cristobalite using X-ray diffraction
Annex C (informative) Example of quality control charting for respirable crystalline silica
Annex D (informative) Estimation of expanded uncertainty for measurements of respirable crystalline silica
Annex E (informative) Differences between samplers (cyclones and other types)
Annex F (informative) Use of proficiency test data to evaluate the performance of XRD and IR methods in the presence of interferences
Bibliography