AS 5370:2024 adopts and modifies ISO 22262-1:2012, which specifies methods for sampling bulk materials and identification of asbestos in bulk materials
Table of contents
Header
About this publication
Preface
Foreword
Introduction
1 Scope
2 Terms and definitions
3 Symbols and abbreviated terms
4 Principle
4.1 General
4.2 Substance determination
4.3 Type of sample
4.4 Range
4.5 Limit of detection
4.6 Limitations of PLM in the detection of asbestos
5 Sample collection
5.1 Requirements
5.1.1
5.1.2
5.1.3
5.1.3.1
5.1.3.2
5.1.3.3
5.1.3.4
5.1.3.5
5.1.3.6
5.1.3.7
5.1.3.8
5.1.3.9
5.2 Procedure
5.2.1 Safety precautions
5.2.2 Sample size requirements
5.2.2.1 General
5.2.2.2 Representative sample
5.2.2.3 Number of samples
5.2.2.4 Precautions to avoid cross-contamination between samples
5.2.2.5 Sampling strategy
5.2.2.6 Taking the samples
5.2.2.7 Sample labelling
5.2.2.8 Sampling record
5.2.2.9 Chain of custody
5.2.2.10 Storage and transport
6 Sample preparation
6.1 General
6.2 Removal of organic materials by ashing
6.3 Removal of soluble constituents by acid treatment
6.4 Sedimentation and flotation
6.5 Combination of gravimetric reduction procedures
7 Analysis by PLM
7.1 Requirements
7.1.1
7.1.2
7.1.3
7.1.4
7.1.4.1
7.1.4.2
7.1.4.3
7.1.4.4
7.1.4.5
7.1.4.6
7.1.4.7
7.1.4.8
7.1.4.9
7.1.4.10
7.2 Qualitative analysis by PLM
7.2.1 Calibration
7.2.2 Sample preparation
7.2.3 Sample analysis
7.2.3.1 Analytical sequence
7.2.3.2 Preliminary examination
7.2.3.3 Sample treatment
7.2.3.4 Stereomicroscope examination
7.2.3.5 Preparation of samples for PLM examination
7.2.3.6 Identification of asbestos by PLM and dispersion staining
7.2.3.7 Identification of asbestos
7.2.3.7.1 Morphology
7.2.3.7.2 Colour and pleochroism
7.2.3.7.3 Birefringence
7.2.3.7.4 Extinction angle
7.2.3.7.5 Sign of elongation
7.2.3.7.6 Refractive indices
7.2.4 Interferences
7.2.4.1 Heated asbestos
7.2.4.2 Leached chrysotile
7.2.4.3 Fibres with morphological and/or optical properties similar to those of asbestos
