ISO TS 23302:2021

TECHNICAL ISO/TS
SPECIFICATION 23302
First edition
2021-11
Nanotechnologies — Requirements
and recommendations for the
identification of measurands that
characterise nano-objects and
materials that contain them
Nanotechnologies – Exigences et recommandations pour
l’identification des mesurandes qui caractérisent les nano-objets et les
matériaux les contenant
Reference number
ISO/TS 23302:2021(E)
ISO/TS 23302:2021(E)
© ISO 2021
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Published in Switzerland
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ISO/TS 23302:2021(E)
Contents Page
Foreword .vii
Introduction .viii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
3.1 General core terms . 1
3.2 Measurand related terms. 3
4 Abbreviated terms . 6
5 Approaches to identify measurands to characterize nano-objects and their
agglomerates and aggregates, and materials containing nano-objects .9
5.1 Procedure . 9
5.2 Types of measurands . 10
5.3 State of nano-objects . 10
6 Measurands related to size and shape measurement of nano-objects and their
agglomerates and aggregates .11
6.1 General . 11
6.2 Measurands related to size and shape measurement. 11
6.2.1 Overview . 11
6.2.2 General relevant standards .12
6.3 Measurands related to size and shape measurement in aerosols .12
6.3.1 Overview . 12
6.3.2 General relevant standards . 13
6.3.3 Electrical low-pressure impaction . 13
6.3.4 Cascade impactors . 14
6.3.5 Differential mobility analysing system . 14
6.3.6 Relevant standards . 15
6.3.7 Optical particle counter .15
6.3.8 Relevant standards .15
6.3.9 Aerodynamic particle sizing . 15
6.3.10 TEM combined with TEM grid samplers . 15
6.3.11 Relevant standards . 16
6.3.12 Scanning electron microscopy . 16
6.3.13 Relevant standards . 17
6.4 Measurands related to size and shape measurement in powders . 17
6.4.1 Overview . 17
6.4.2 Relevant standards . 17
6.4.3 Scanning electron microscopy . 18
6.4.4 Relevant standards . 18
6.4.5 Gas adsorption, the BET method. 18
6.4.6 Relevant standard . 18
6.4.7 Laser diffraction . 18
6.4.8 Relevant standard . 19
6.4.9 X-ray diffraction . 19
6.4.10 Relevant standards . 19
6.4.11 Raman spectroscopy . 19
6.5 Measurands related to size and shape measurements of nano-objects in liquid
dispersions . 20
6.5.1 Overview . 20
6.5.2 Centrifugal liquid sedimentation . 21
6.5.3 Relevant standards . 21
6.5.4 Dynamic light scattering . 21
6.5.5 Relevant standards . 22
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ISO/TS 23302:2021(E)
6.5.6 Laser diffraction . 22
6.5.7 Relevant standard . 22
6.5.8 Small angle X-ray scattering . 22
6.5.9 Relevant standard .22
6.5.10 Particle tracking analysis . 22
6.5.11 Relevant standards .23
6.5.12 Electron microscopy .23
6.5.13 Field flow fractionation .23
6.5.14 Relevant standard . 24
6.5.15 Single particle ICP-MS . 24
6.5.16 Relevant standard .25
6.6 Measurands related to size and shape measurement on surfaces (microscopy
techniques) . 25
6.6.1 Overview . 25
6.6.2 Scanning electron microscopy . 25
6.6.3 Atomic force microscopy . 25
6.6.4 Relevant standards . 26
7 Measurands related to chemical analysis of nano-objects and their agglomerates
and aggregates .26
7.1 General . 26
7.2 Measurands related to surface chemical analysis of nano-objects and their
agglomerates and aggregates. 27
7.2.1 Measurands . 27
7.2.2 Auger electron spectroscopy .28
7.2.3 Relevant standards .28
7.2.4 Electron energy loss spectroscopy .28
7.2.5 Relevant standard .
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