ISO INTERNATIONAL 4224 STANDARD First edition 2000-03-01 Ambient air Determination of carbon monoxide Non-dispersive infrared spectrometry method Air ambiant - Dosage du monoxyde de carbone - Méthode par Reference number ISO 4224:2000(E) ISO @ ISO 2000 ISO 4224:2000(E) PDF disclaimer 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, parties accept therein the responsibility of not infringing Adobe's licensing policy. The Iso Central Secretariat accepts no liability in this area. 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. @ISO2000 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 56 : CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 734 10 79 E-mail [email protected] Web www.iso.ch Printed in Switzerland IsO2000-Allrightsreserved ISO 4224:2000(E) Contents Page Foreword Introduction 1 Scope. 2 Normative references 3 Principle 4 Interferences . 4.1 General....... 4.2 Water vapour. 4.3 Carbon dioxide.. 4.4 Hydrocarbons. 5 Apparatus 6 Regents and materials 7 Precautions 8 Sampling 9 Calibration and standardization.. 9.1 Calibration procedures. 9.2 Frequency of calibration.. 10 Procedure 11 Calculation 12 Precision and bias 12.1 Precision [4] 12.2 Bias Annex A (normative) Minimum performance specifications for non-dispersive infrared carbon monoxide analyser .8 Annex B (normative) Calibration procedures . .9 Annex C (normative) Operational checks. 13 Bibliography 4