ISO 26824-2022 PDF

Full title and description

ISO 26824:2022 — Particle characterization of particulate systems — Vocabulary. This international standard provides a consolidated vocabulary of terms and definitions used for the characterization of particles and particulate systems across measurement techniques and size ranges from nanometre to millimetre.

Abstract

This document defines terms relevant to particle and particulate‑system characterization, covering representation of particle size results, descriptive and quantitative representation of particle shape and morphology, sample preparation, specific surface area and porosity, and terminology for many measurement methods (sedimentation, classification, acoustic methods, laser diffraction, dynamic light scattering, single‑particle light interaction methods, differential electrical mobility analysis, image analysis, etc.). The scope spans sizes from nanometre to millimetre.

General information

• Status: Published.
• Publication date: 8 August 2022 (ISO publication, edition 2 published 2022‑08‑08).
• Publisher: ISO — International Organization for Standardization (ISO/TC 24/SC 4 responsible).
• ICS / categories: 19.120 — Particle size analysis / sieving; 01.040.19 — Testing (vocabularies).
• Edition / version: Edition 2 (2022).
• Number of pages: 59 pages.

Scope

ISO 26824:2022 standardizes terminology used when characterizing particles and particulate systems so that results, reports and method descriptions are more consistent and interoperable. It addresses vocabulary for reporting particle size distributions, particle shape and morphology descriptors, sample‑preparation terms, surface area and porosity concepts, and names/definitions for a wide range of measurement techniques applicable roughly from nanometre up to millimetre scales. The vocabulary is intended to be applicable across many industries and research fields that measure particulate materials.

Key topics and requirements

• Standardized definitions for particle size and size‑distribution descriptors (e.g., number‑, area‑ and volume‑based measures).
• Terms and descriptors for particle shape and morphology (qualitative and quantitative descriptors).
• Vocabulary for sample preparation and dispersion concepts used before measurement.
• Definitions relating to specific surface area and porosity terminology.
• Names and scope of measurement methods: sedimentation, sieving/classification, acoustic methods, laser diffraction, dynamic light scattering, single‑particle light interaction techniques, differential electrical mobility analysis, image analysis, and others.
• Size‑scale coverage from nanometre to millimetre; guidance to ensure consistent usage when reporting results from different measurement principles.

Typical use and users

Used by instrument manufacturers, analytical and quality‑control laboratories, materials scientists, pharmaceutical and chemical industry professionals, environmental and aerosol researchers, and standards developers to ensure consistent terminology in specifications, test reports, method descriptions, and inter‑laboratory communication. It is primarily a vocabulary/reference tool rather than a test method.

Related standards

Standards frequently used alongside ISO 26824:2022 include measurement‑method standards from ISO/TC 24/SC 4 such as ISO 13320 (laser diffraction for particle size analysis) and standards for single‑particle light interaction and aerosol measurement (e.g., parts of ISO 21501 series); the 2022 edition replaces/updates the earlier ISO 26824:2013 vocabulary. Users will commonly cross‑reference method‑specific standards when applying the vocabulary.

Keywords

particle, particulate system, vocabulary, terminology, particle size, particle size distribution, particle shape, morphology, specific surface area, porosity, laser diffraction, dynamic light scattering, sedimentation, image analysis, aerosol, sieving.

FAQ

Q: What is this standard?

A: ISO 26824:2022 is an international vocabulary (glossary) standard that defines terms used in particle and particulate‑system characterization to promote consistent use of terminology.

Q: What does it cover?

A: It covers definitions and explanatory terms for particle size descriptors and distributions, particle shape and morphology, sample preparation, surface area and porosity concepts, and names/definitions of many measurement techniques across a size range from nanometre to millimetre.

Q: Who typically uses it?

A: Instrument manufacturers, QC and test laboratories, researchers in materials science, pharmaceuticals, environmental/aerosol fields, and standards committees use it as a reference to harmonize language in specifications, reports and standards.

Q: Is it current or superseded?

A: Current. Edition 2 (published August 2022) supersedes the withdrawn 2013 edition (ISO 26824:2013).

Q: Is it part of a series?

A: It is a standalone vocabulary standard developed under ISO/TC 24/SC 4 and is commonly used together with method‑specific standards from the same committee (for example ISO 13320 for laser diffraction and relevant ISO aerosol/particle measurement standards).

Q: What are the key keywords?

A: Particle size, size distribution, particle shape, morphology, sample preparation, specific surface area, porosity, vocabulary, laser diffraction, dynamic light scattering, image analysis.