ISO INTERNATIONAL STANDARD 6144 Second edition 2003-02-01 Gas analysis Preparation of calibration gas mixtures Static volumetric method Analyse des gaz Preparation des melanges de gaz pour étalonnage Méthode volumétrique statique Reference number ISO 6144:2003(E) ISO @ ISO 2003 T by IHS under lic itted without license from IHS Not for Resale ISO 6144:2003(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 accepts no liability in this area. Adobe is a trademarkof AdobeSystems 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 ?ISO2003 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 Copyriahtinteratinal Oorganization for Standardization @Iso2003-All rightsreserved ed without license from IHS Not for Resale ISO 6144:2003(E) Contents Page Foreword 1 Scope 1 2 Normative references 3 Terms and definitions. 4 Principle 5 Apparatus.. .2 6 Procedure for preparing the calibration gas mixture. 7 Calculation of the volume fraction of the calibration component in the gas mixture.... 8 Determination of the uncertainty in the concentration of the calibration component in the gas mixture . Annex A (informative) Example of an apparatus suitable for the preparation of calibration gas mixtures by the static volumetric method. .12 Annex B (informative) Example of determination of the volume of metering syringes .. .15 Annex C (informative) Example of the determination of the uncertainty in the concentration of a calibration gas mixture prepared by the static volumetric method... 17 Annex D (informative) Example of the determination of the stability, as a function of time, of prepared calibration gas mixtures .22 Bibliography ili by IHS under e from IHS Not for Resale ISO 6144:2003(E) Foreword IsO (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. Each member body interested in a subject for which a technical committee has beer 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 6144 was prepared by Technical Committee ISO/TC 158, Analysis of gases revised. @ ISO 2003 - All rights reserved zation for Standardizatior INTERNATIONALSTANDARD ISO 6144:2003(E) Gas analysis Preparation of calibration gas mixtures : Static volumetric method 1 Scope This International Standard specifies a method for the preparation of calibration gas mixtures by a static volumetric method and provides a procedure for calculatingthe volumetric composition ofthe mixture.It can is usually nitrogen or air[1, 2]) or with mixtures containing more than one component in the complementary gas. This International Standard also specifies how the expanded uncertainty in