ISO 13320:2020
(Main)Particle size analysis — Laser diffraction methods
Particle size analysis — Laser diffraction methods
This document provides guidance on instrument qualification and size distribution measurement of particles in many two-phase systems (e.g. powders, sprays, aerosols, suspensions, emulsions and gas bubbles in liquids) through the analysis of their light-scattering properties. It does not address the specific requirements of particle size measurement of specific materials. This document is applicable to particle sizes ranging from approximately 0,1 µm to 3 mm. With special instrumentation and conditions, the applicable size range can be extended above 3 mm and below 0,1 µm. For spherical and non-spherical particles, a size distribution is reported, where the predicted scattering pattern for the volumetric sum of spherical particles matches the measured scattering pattern. This is because the technique assumes a spherical particle shape in its optical model. For non-spherical particles the resulting particle size distribution is different from that obtained by methods based on other physical principles (e.g. sedimentation, sieving).
Analyse granulométrique — Méthodes par diffraction laser
General Information
Relations
Buy Standard
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 13320
Second edition
2020-01
Particle size analysis — Laser
diffraction methods
Analyse granulométrique — Méthodes par diffraction laser
Reference number
©
ISO 2020
© ISO 2020
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
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms, definitions and symbols . 1
3.1 Terms and definitions . 1
3.2 Symbols . 6
4 Principle . 8
4.1 General . 8
4.2 Theory . 8
4.3 Typical instrument and optical arrangement. 9
4.4 Measurement zone .11
4.5 Application and sample presentation .11
4.6 Off-line measurements .12
4.7 In-line measurements .12
4.8 Online measurements .12
4.9 At-line measurements .13
4.10 Scattering and detectors .13
5 Operational requirements and procedures .13
5.1 Instrument location .13
5.2 Dispersion gases .13
5.3 Dispersion liquids .14
5.4 Sample inspection, preparation, dispersion and concentration .14
5.4.1 Sample inspection .14
5.4.2 Preparation .14
5.4.3 Dispersion .14
5.4.4 Concentration .15
5.5 Measurement .15
5.5.1 Setting up instrument and blank measurement .15
5.5.2 Sample preparation .16
5.5.3 Data collection of the scattering pattern .16
5.5.4 Selection of an appropriate optical model .16
5.5.5 Conversion of scattering pattern into PSD .16
5.5.6 Robustness .17
5.6 Resolution and sensitivity .17
5.6.1 General.17
5.6.2 Resolution .17
5.6.3 Sensitivity and result variability .17
6 Accuracy repeatability and instrument qualification.18
6.1 General .18
6.2 Accuracy .19
6.2.1 Introduction .19
6.2.2 Accuracy test .19
6.3 Instrument repeatability .19
6.3.1 Introduction .19
6.3.2 Repeatability test .19
6.4 Method repeatability .20
6.4.1 Introduction .20
6.4.2 Method repeatability test .20
6.5 Accuracy under intermediate precision conditions .20
6.5.1 General.20
6.5.2 Intermediate precision conditions (general test) .21
7 Reporting of results .21
7.1 General .21
7.2 Sample .21
7.3 Dispersion .22
7.4 Laser diffraction measurement .22
7.5 Analyst identification: .22
Annex A (informative) Theoretical background of laser diffraction .24
Annex B (informative) Advice on dispersion liquids .41
Annex C (informative) Dispersion methods — Recommendations .42
Annex D (informative) Instrument preparation — Recommendations .44
Annex E (informative) Error sources and diagnosis .46
Annex F (informative) Refractive index — Recommendations .49
Annex G (informative) Laser diffraction robustness and ruggedness .51
Annex H (normative) Certified reference materials, reference materials and comparison
parameters .54
Bibliography .57
iv © ISO 2020 – All rights reserved
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, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the
...
INTERNATIONAL ISO
STANDARD 13320
Second edition
2020-01
Particle size analysis — Laser
diffraction methods
Analyse granulométrique — Méthodes par diffraction laser
Reference number
©
ISO 2020
© ISO 2020
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
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms, definitions and symbols . 1
3.1 Terms and definitions . 1
3.2 Symbols . 6
4 Principle . 8
4.1 General . 8
4.2 Theory . 8
4.3 Typical instrument and optical arrangement. 9
4.4 Measurement zone .11
4.5 Application and sample presentation .11
4.6 Off-line measurements .12
4.7 In-line measurements .12
4.8 Online measurements .12
4.9 At-line measurements .13
4.10 Scattering and detectors .13
5 Operational requirements and procedures .13
5.1 Instrument location .13
5.2 Dispersion gases .13
5.3 Dispersion liquids .14
5.4 Sample inspection, preparation, dispersion and concentration .14
5.4.1 Sample inspection .14
5.4.2 Preparation .14
5.4.3 Dispersion .14
5.4.4 Concentration .15
5.5 Measurement .15
5.5.1 Setting up instrument and blank measurement .15
5.5.2 Sample preparation .16
5.5.3 Data collection of the scattering pattern .16
5.5.4 Selection of an appropriate optical model .16
5.5.5 Conversion of scattering pattern into PSD .16
5.5.6 Robustness .17
5.6 Resolution and sensitivity .17
5.6.1 General.17
5.6.2 Resolution .17
5.6.3 Sensitivity and result variability .17
6 Accuracy repeatability and instrument qualification.18
6.1 General .18
6.2 Accuracy .19
6.2.1 Introduction .19
6.2.2 Accuracy test .19
6.3 Instrument repeatability .19
6.3.1 Introduction .19
6.3.2 Repeatability test .19
6.4 Method repeatability .20
6.4.1 Introduction .20
6.4.2 Method repeatability test .20
6.5 Accuracy under intermediate precision conditions .20
6.5.1 General.20
6.5.2 Intermediate precision conditions (general test) .21
7 Reporting of results .21
7.1 General .21
7.2 Sample .21
7.3 Dispersion .22
7.4 Laser diffraction measurement .22
7.5 Analyst identification: .22
Annex A (informative) Theoretical background of laser diffraction .24
Annex B (informative) Advice on dispersion liquids .41
Annex C (informative) Dispersion methods — Recommendations .42
Annex D (informative) Instrument preparation — Recommendations .44
Annex E (informative) Error sources and diagnosis .46
Annex F (informative) Refractive index — Recommendations .49
Annex G (informative) Laser diffraction robustness and ruggedness .51
Annex H (normative) Certified reference materials, reference materials and comparison
parameters .54
Bibliography .57
iv © ISO 2020 – All rights reserved
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, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.