ISO INTERNATIONAL STANDARD 21501-1 First edition 2009-06-01 Determinationofparticlesize distribution - Single particle light interaction methods Part 1: Light scattering aerosol spectrometer Determination de la distribution granulometriqueMethodes d'interactionlumineusedeparticulesuniques Partie1:Spectrometred'aérosolenlumieredispersée Reference number ISO 21501-1:2009(E) @ISO2009 ISO21501-1:2009(E) PDFdisclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In accepts noliabilityinthisarea. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by IsO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHTPROTECTEDDOCUMENT ?ISO2009 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either isO at the address below or isO's memberbody in the country of the requester. ISO copyright office Casepostale56.CH-1211Geneva20 Tel.+ 4122749 0111 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published inSwitzerland @ ISO 2009 -All rights reserved without license from IHS Not for Resale ISO21501-1:2009(E) Contents Page Foreword. Introduction 1 Scope 2 Terms and definitions 3 Requirements 3.1 Sizerange 3.2 Counting efficiency 3.2.1 General..... 3.2.2 Lowersizelimit 3.2.3 Upper size limit... 3.3 Sizeresolution 3.4 Sizingaccuracy. 3.5 Sampling flow rate 3.6 Effective detection flow rate. 3.7 Maximumparticlenumberconcentration 4 Test method 4.1 Size calibration 4.2 Effectivedetectionflow rate.. 4.3 Maximumparticlenumberconcentration 4.4 Sizeresolution... 4.5 Counting efficiency AnnexA(informative)Principleoftheinstruments 11 AnnexB(informative)Particlesizestandards. .18 AnnexC (informative)Effectsof theLSASparametersontheparticlesizeandparticlenumber concentrationdetermination.... 21 AnnexD (informative)Representativesampling .... AnnexE (informative)Exampleof an LSAS calibration with DEMS-classified PSLparticles... 24 Bibliography... 26 ili from IHS