ISO INTERNATIONAL STANDARD 4226 Third edition 2007-12-15 Air quality General aspects Units of measurement Qualite de I'air Aspects généraux - Unites de mesurage Reference number ISO 4226:2007(E) @ ISO 2007 by IHS under lic Not for Resale ISO 4226:2007(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. COPYRIGHT PROTECTED DOCUMENT @ISO2007 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, 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 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @ IS0 2007 - All rights reserved Tby IHS unde I without license from IHS Not for Resale ISO 4226:2007(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies technicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeer non-governmental, in liaison with isO, also take part in the work. isO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. ISO 4226 was prepared by Technical Committee ISO/TC 146, Air quality, Subcommittee SC 4, General aspects. This third edition cancels and replaces the second edition (IsO 4226:1993), Table 1 of which has been editorially revised. ii ISO 4226:2007(E) Introduction The series ofInternational Standards measurement of gases, vapours and particles. In order to enable results to be compared either within or information so that sound conclusions may be drawn. It is also desirable to keep the number of units of measurementtoa minimum. @ISO 2007-All rights reserved y IHS unde setworking pemited withoutlicense from IHs Not for Resale INTERNATIONAL STANDARD ISO 4226:2007(E) Air quality General aspects Units of measurement 1 Scope This International Standard lays down the units to be used when reporting results of air quality measurements. NOTE General guidance on the International System of Units is given in IsO 1000. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IsO 31-0, Quantities and units —Part O: General principles Iso 1000, S/ units and recommendations for the use of their multiples and of certain other units 3 Units concerning units specified in IsO 31-0. 1 ensefromIHS Not for Resale ISO 4226:2007(E) Table 1 - Units un No. Quantity Name Symbol 3.1 Units for substances 3.1.1 Gases