ISO INTERNATIONAL 13319-1 STANDARD First edition 2021-03 Determination of particle size distribution Electrical sensing zone method - Part 1: Aperture/orifice tube method Determination de la distribution granulométrique-Méthodede détectiondezonesélectrosensibles- Partie 1: Méthode d'ouverture/d'orifice du tube Reference number IS0 13319-1:2021(E) ISO @IS0 2021 Copyright International Organization for Standardizatiorn IS0 13319-1:2021(E) COPYRIGHTPROTECTEDDOCUMENT ISQ2021 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 40i : Ch.de Blandonnet 8 CH-1214 Vernier,Geneva Phone: +41 22 749 01 11 Email: [email protected] Website: www.iso.org Published in Switzerland Copyright HteretralibgriatrbsStarndardzafion IS0 2021-All rights reserved IS013319-1:2021(E) Contents Page Foreword .V 1 Scope ..1 2 Normativereferences. ..1 3 Terms and definitions ..1 4 Symbols. .2 5 Principle .3 6 General operation .4 6.1 Response .4 6.2 Size limits. 6.3 Effect of coincident particlepassage .5 6.4 Deadtime ..6 6.5 Analysis volume .7 .7 7 Repeatability and reproducibility of counts 7.1 Instrumentrepeatability .7 7.2 Methodreproducibility/intermediateprecision .8 8 Operational procedures 8.1 General .8 8.2 Instrument location. .8 8.3 Linearity of theaperture/amplifier system .8 8.4 Linearityofthecountingsystem .8 8.5 Choice of electrolyte solution. .8 8.5.1 General .8 8.5.2 Special considerationsfor smallapertures (D<50 μm) .9 8.5.3 Special considerations forlarge apertures (D>4oo μm) ..9 8.6 Preparationof electrolytesolution .9 8.7 Recommended sampling, sample splitting, sample preparation and dispersion 8.7.1 .9 General 8.7.2 Method 1: Using apaste .10 8.7.3 Method2:Alternativemethodapplicabletolow-densityparticlesofless than50μm .10 8.7.4 Suspensions and emulsions 11 8.7.5 Verification of the dispersion 11 8.8 Choiceofaperture(s)andanalysisvolume(s) .11 8.9 Clearing an aperture blockage. .11 8.10 Stabilityof dispersion .12 8.11 .12 Calibration 8.11.1 General ..12 8.11.2 Calibrationproceduremicrospherecalibration. ..13 9 Analysis. .13 10 Calculation of results ..13 11 Instrument qualification .14 11.1 ..14 General 11.2 Report ..14 AnnexA (informative)Derivation ofmaximum countnumbertolimitcoincidence .15 Annex B (informative)Fishbone diagram formethod development ..17 AnnexC (informative)Calibrationandcontroloffrequentlyusedapertures ..19 ..20 Annex D (informative) Mass integration method for calibration and mass balance. Annex E (informative) Calibration for the measurement of porous and conductive particles. ..26 Copyigh Intemational OgartCISOa2021sandaxktor-Alightsreserved iii