ISO INTERNATIONAL STANDARD 7504 Third edition 2015-05-15 Gas analysis Vocabulary Analyse des gaz - Vocabulaire Reference number IS0 7504:2015(E) ISO International Organization for Standardization Zhejang Institute of Standardization 5956617 IS02015 itted without license from IHS IS0 7504:2015(E) COPYRIGHTPROTECTEDDOCUMENT IS02015,PublishedinSwitzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISO copyrightoffice Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyright@iso.org www.iso.org PrganizationforStandardization Not for Resale, 2015/7/24 03:11:35 etworking permitted without license from IHS IS0 7504:2015(E) Contents Page Foreword ..iv 1 Scope .1 2 Normative references .1 3 Terms relating to general concepts. 4 Terms relating to physical properties .3 5 Terms relating to calibration gases. ..5 6 Terms relating to methods for the preparation of gas mixtures ..6 7 Terms relating to storage in gas cylinders ..7 8 Terms relating to gas analysis .1 9 Terms from metrology .9 Annex A (normative) List of terms defined in ISO/IEC Guide 98-3 and ISO/IEC Guide 99 ..11 Annex B (normative) Sampling definitions ..12 Annex C (informative) Index .13 Bibliography .15 iii lout license from IHS