ISO INTERNATIONAL STANDARD 6145-9 Second edition 2009-10-01 GasanalysisPreparationofcalibration gas mixtures using dynamic volumetric methods- Part 9: Saturation method Analysedesgaz-Preparationdesmelangesdegazpourétalonnage aIaidedemethodesvolumetriquesdynamiques- Partie9:Methodeparsaturation Reference number ISO 6145-9:2009(E) @ISO2009 ISO 6145-9:2009(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 respons bility 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 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, 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 ii @ ISO 2009All rights reserved ISO 6145-9:2009(E) Contents Page Foreword 1 Scope 2 Normative references 3 Terms and definitions 4 Principle.. 5 Equipmen 5.1 Setup. 5.2 Gaspreparation. 5.3 Compatibility of the apparatus 5.4 Selection of the apparatus 5.5 Pressure measurement 5.6 Temperaturecontrol. 5.7 Instrumentation 5.8 Purity. 6 Procedure 6.1 Installation. 6.2 Operation ofa direct system 6.3 Operationofaclosedcirculationsystem..... 7 Uncertainty of measurement.. Annex A (normative)Overview ofvapourpressure data forvarious substances... AnnexB (informative)Examples ofuncertaintyestimations.. Bibliography ISO 2009 - All rights reserved ili ISO 6145-9:2009(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 been non-governmental, in liaison with Iso, also take part in the work. Iso collaborates closely with the InternationalElectrotechnicalCommission(lEC)onallmattersofelectrotechnicalstandardization. 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. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. IsO shall not be held responsible for identifying any or all such patent rights. ISO6145-9waspreparedbyTechnical CommitteeISO/TC 158, Analysisofgases. This second edition cancels and replaces the first edition (IsO 6145-9:2001) and ISO 6145-9:2001/Cor 1:2002, which have been technically revised. As Annex B is purely informative, and included as a guide to the methods of calculation of the volume fractions, the numerical examples which are presented in it have been carried forward verbatim from ISO 6145-9:2001 to this updated standard.Although some references have been updated in the present bibliography to the most recent editions,