ISO INTERNATIONAL STANDARD 22412 Second edition 2017-02 Particle size analysis - Dynamic light scattering (DLS) Analyse granulometrique - Dispersion lumineuse dynamique (DLD) Reference number IS0 22412:2017(E) International Organization for Standardization @ IS0 2017 No reproduction or networking permitted without license from IHS IS0 22412:2017(E) COPYRIGHT PROTECTED DOCUMENT IS0 2017, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form 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 copyrightoffice Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org Licensee-ZHEJIANG INST OF STANDARDIZoISQ37 -All rights reserved No reproduction or networking permited withoutlicense from IHS IS0 22412:2017(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. ..1 2 Normative references ..1 3 Terms and definitions ..1 4 Symbols and units .3 5 Principle. 6 Apparatus. 7 Test sample preparation .7 7.1 General ..7 7.2 Concentration limits .7 7.3 Checks for concentration suitability .7 8 Measurement procedure .8 9 Evaluation of results ..10 9.1 General. .10 9.2 Correlation analysis. .11 9.2.1 Cumulants method .11 9.2.2 Distribution calculation algorithms 11 9.3 Frequency analysis .12 10 System qualification and quality control .13 10.1 System qualification. .13 10.2 Quality control of measurement results .13 10.3 Method precision and measurement uncertainty ..14 11 Test report ..14 Annex A (informative) Theoretical background ..16 Annex B (informative) Guidance on potential measurement artefacts and on ways to minimize their influence .25 Annex C (informative) Online measurements .28 Annex D (informative) Recommendations for sample preparation ..29 Bibliography ..33 iii See=ZHEJIANG INST OF STANDARDIZATIONC1 5956617 without license from IHS