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ISO 19430:2024

(Main)

Determination of particle size distribution and number concentration by particle tracking analysis (PTA)

Determination of particle size distribution and number concentration by particle tracking analysis (PTA)

This document specifies the particle tracking analysis (PTA) method under static (no flow) conditions for the determination of the number–based particle size distribution and the number concentration in liquid dispersions (solid particles, liquid droplets or bubbles suspended in liquids). This document covers two tracking regimes. — Brownian motion tracking for smaller particles. — Gravitational fall tracking for larger particles. This document outlines the theory and basic principles of the PTA method along with its limitations and advantages for both size evaluation and number concentration measurements. It also describes commonly used instrument configurations and measurement procedures as well as system qualifications and data reporting.

Détermination de la distribution granulométrique et de la concentration en nombre par l’analyse de suivi de particule (PTA)

General Information

Status
Published
Publication Date
15-Aug-2024
ICS
19.120 - Particle size analysis. Sieving
Technical Committee
ISO/TC 24/SC 4 - Particle characterization
Drafting Committee
ISO/TC 24/SC 4 - Particle characterization
Current Stage
6060 - International Standard published
Start Date
16-Aug-2024
Due Date
31-Mar-2024
Completion Date
16-Aug-2024
Ref Project

Relations

Revises
ISO 19430:2016 - Particle size analysis — Particle tracking analysis (PTA) method
Effective Date
06-Jun-2022

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ISO 19430:2024 - Determination of particle size distribution and number concentration by particle tracking analysis (PTA) Released:16. 08. 2024ISO 19430:2024 - Determination of particle size distribution and number concentration by particle tracking analysis (PTA) Released:16. 08. 2024
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ISO 19430:2024 - Determination of particle size distribution and number concentration by particle tracking analysis (PTA) Released:16. 08. 2024
English language
42 pages
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Standards Content (Sample)


International
Standard
ISO 19430
Second edition
Determination of particle
2024-08
size distribution and number
concentration by particle tracking
analysis (PTA)
Détermination de la distribution granulométrique et de la
concentration en nombre par l’analyse de suivi de particule (PTA)
Reference number
© ISO 2024
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms. 6
5 Principles . 7
5.1 General .7
5.2 Measurement types .7
5.2.1 General .7
5.2.2 Particle detection.8
5.2.3 Brownian motion tracking .9
5.2.4 Gravitational motion tracking . .9
5.3 Key physical parameters .10
5.4 Limits of detection .10
5.4.1 General .10
5.4.2 Lower size limit of detection .11
5.4.3 Upper size limit of detection .11
5.4.4 Particle number concentration measurement limits . 12
5.4.5 Sample and sampling volume . 13
5.5 Measurement precision and uncertainties . 13
5.5.1 Size measurement uncertainty . 13
5.5.2 Counting efficiency .14
5.5.3 Size resolution . 15
5.5.4 Polydispersity . 15
5.5.5 Sensing volume . 15
6 Apparatus . 17
6.1 General .17
6.2 Sample cell (with sample in dispersion) .17
6.3 Illumination .17
6.4 Optical image capturing .18
6.5 Image analysis, tracking and data processing computer. . .18
7 Measurement procedure .20
7.1 General . 20
7.2 Sample preparation . 20
7.3 Instrument set-up and initialisation .21
7.4 Sample delivery . .21
7.5 Sample illumination . 22
7.6 Particle imaging and video capture . 22
7.7 Track analysis . 22
7.8 Measurements . . 23
7.8.1 Particle sizing and number-based size distribution . 23
7.8.2 Total particle number measurement .24
7.8.3 Particle background count .24
7.8.4 Volume concentration .24
7.9 Results evaluation .24
7.9.1 General .24
7.9.2 Particle size evaluation .24
7.9.3 Particle count results interpretation .24
7.9.4 Distribution analysis . 25
7.9.5 Data analysis and results display . 25
8 System qualification and quality control .25

iii
8.1 General . 25
8.2 System installation requirements . 25
8.3 System maintenance . 25
8.4 System operation . 26
8.5 Instrument qualification (for sizing) . 26
8.6 Instrument qualification (for number concentration) .27
9 Data recording .27
10 Test report .28
Annex A (informative) Theory .30
Annex B (informative) Comparative study of number concentration evaluation of gold
nanoparticles in suspension .33
Annex C (informative) Using sedimentation data with PTA .35
Annex D (informative) Serial dilution experiment .37
Bibliography .40

iv
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
gov
...

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