ISO INTERNATIONAL STANDARD 19739 First edition 2004-05-01 Natural gas Determination of sulfur compounds using gas chromatography Gaz naturel Détermination des composés soufrés par chromatographie en phase gazeuse Reference number ISO 19739:2004(E) ISO @ ISO 2004 ISO 19739:2004(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 ISO2004 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 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @ ISO 2004 - All rights reserved ISO 19739:2004(E) Contents Page Foreword. Introductiol 1 Scope. 2 Normative references 3 Termsanddefinitions 4 Principle 5 Apparatus 6 Sampling...... 6.1 Safety precautions 6.2 Temperature control 6.3 Construction materials. 6.4 Cleanness 6.5 Installation of the calibration gas cylinder. 6.6 Pressurecontrol.. 6.7 Purging of reduction valve and transfer lines 6.8 Flow control.... 6.9 Diffusioncontrol 6.10 Automation and sequences of sampling.. 7 Calibration.. 8 Analysis.. 9 Performance characteristics required for sulfur analysis, 10 Test report.. Annex A (informative) Columns mostly used in sulfur analysis (with internal phase and dimensions) 9 Annex B (informative) Types of detectors used in sulfur analysis , .10 Annex C (informative) GC method using capillary column and FPD . 13 Annex D (informative) GC method using ED.. 19 Annex E (informative) GC method using MSD... AnnexF(informative)GCmethodusingAED. Annex G (informative) GC methods using column switching and FPD.. 31 Annex H (informative) GC method using capillary column and ScD. 43 Annex I (informative) GC method using capillary column and PFPD ... 50 Bibliography ... 55 alion'ghts reserved ii ISO 19739:2004(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 technicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnical committeehasbeen 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. 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. ISO 19739 was prepared by Technical Committee ISO/TC 193, Natural gas, Subcommittee SC 1, Analysis of naturalgas. This first edition of ISO 19739 cancels and replaces ISO 6326-2:1981 and ISO 6326-4:1994, of which