ISO INTERNATIONAL STANDARD 12141 First edition 2002-11-01 Stationary source emissions Determination of mass concentration of particulate matter (dust) at low concentrations Manual gravimetric method Emissions de sources fixes - Détermination d'une faible concentration en masse de matieres particulaires (poussieres)Méthode gravimétrique manuelle Reference number ISO 12141:2002(E) @ ISO 2002 CopyrightInternational Organization for Standardization No reproduction or networking permitted without license from IHS Not for Resale ISO 12141:2002(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 downloading this file, 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. @ISO2002 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 member body in the country of the requester. ISO copyright office Case postale 56CH-1211Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.ch Printed in Switzerland CyationalganzainStandardizatio @ ISO 2002 - All rights reserved No reproduction or networking permitted without license from IHS Not for Resale ISO 12141:2002(E) Contents Page Scope 2 Normative references 3 Terms and definitions Principle 4 5 Sampling plane and sampling points . 5 6 Apparatus and materials (see summary annex E) 7 Calculation of nozzle diameter to obtain weighable quantities of dust 13 8 Weighing procedure 14 9 Sampling procedure 16 10 Thermal behaviour of dusts 18 11 Validation of results 20 12 Calculations ... 21 13 Performance characteristics of the method 22 14 Test report 23 Annexes A Requirements related to the working platform 25 B Determination of flow direction with Pitot tubes . 26 c Determination of positions of sampling points in circular and retangular ducts 27 D Examples of suitable access ports for sampling equipment . 31 E Proven entry nozzle designs.. 33 F Summary of apparatus requirements. 35 G: Sampling volume, flowrate and duration.. 36 Examples of weighing bias 37 Precision data 39 Bibliography 40 CopyrightIntenationalOrganizatinforStandardizatioserved ili No reproduction or networking permitted without license from IHS Not for Resale ISO 12141:2002(E) Foreword ISsO (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.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhas Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 3 Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights. IsO shall not be held responsible for identifying any or all such patent rights. International Standard ISO 12141 was prepared by Technical Committee ISO/TC 146, Air quality, Subcommittee SC 1, Stationary source emissions. Annexes A, C, E and F form a n