ISO 21363:2020 PDF

Name: ISO 21363:2020 — Nanotechnologies — Measurements of particle size and shape distributions by transmission electron microscopy
SKU: ISO 21363:2020
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Nanotechnologies — Measurements of particle size and shape distributions by transmission electron microscopy

Название (английский):

ISO 21363:2020

Nanotechnologies — Measurements of particle size and shape distributions by transmission electron microscopy

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 83
Дата публикации:: 25 июня 2020 г.
Издание:: ISO IS 21363 edition 1 version 1
ICS:: 07.120

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Описание (английский):

This document specifies how to capture, measure and analyse transmission electron microscopy images to obtain particle size and shape distributions in the nanoscale. This document broadly is applicable to nano-objects as well as to particles with sizes larger than 100 nm. The exact working range of the method depends on the required uncertainty and on the performance of the transmission electron microscope. These elements can be evaluated according to the requirements described in this document.

Abstract

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Overview

ISO 21363:2020 - Nanotechnologies: Measurements of particle size and shape distributions by transmission electron microscopy (TEM) - specifies a standardized workflow for capturing, measuring and analysing TEM images to obtain particle size and shape distributions at the nanoscale. The standard applies to discrete nano‑objects and to particles larger than 100 nm; the effective working range depends on the required measurement uncertainty and the performance of the TEM. ISO 21363:2020 was prepared by ISO/TC 229 and includes practical guidance, calibration requirements and case studies to support reproducible nanomaterials characterization.

Key topics and technical requirements

Workflow stages: sample preparation, instrument factors, image capture, particle analysis, data analysis and reporting.

Sample handling: guidance on representative sampling, dispersion methods to minimize agglomeration, and selection of mounting supports.

Instrument calibration and setup: procedures for calibrating magnification and image scale, selection of TEM operating conditions and use of calibration standards.

Image capture: recommendations on magnification, minimum particle area, frame selection and number of particles/micrographs needed for statistical validity.

Particle analysis: manual and automated particle detection, treatment of touching particles, artefacts and contaminants, and individual particle vs. batch analysis.

Descriptors: definitions and use of size descriptors (linear and areal), shape descriptors (elongation ratios, ruggedness) and bivariate descriptor analysis.

Data analysis and uncertainty: fitting distribution models, assessing repeatability, intermediate precision and reproducibility, estimating measurement uncertainty for fitted parameters, and visualization tools (residuals, quantile plots).

Reporting: minimum reporting elements, uncertainty statements and metadata to support comparability and traceability.

Case studies: practical examples including spheroidal gold nanospheres, bimodal colloidal silica mixtures, gold nanorods/nanocubes, carbon black aggregates and titania aggregates.

Applications and users

ISO 21363:2020 is valuable for:

Research laboratories and academic groups performing TEM-based nanoparticle characterization.

Industrial quality control teams in nanomaterials manufacturing and coatings, catalysis, electronics and pharmaceuticals.

Instrument manufacturers and service labs developing or validating TEM image analysis workflows.

Regulatory bodies and standards organizations requiring traceable size/shape data for safety, compliance and labeling.

Keywords: ISO 21363:2020, transmission electron microscopy, TEM, particle size distribution, particle shape distribution, nanotechnologies, nanoparticles, measurement uncertainty, image analysis.

ISO 21363:2020 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and users

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