ISO INTERNATIONAL STANDARD 11423-1 First edition 1997-06-15 Water quality -- Determination of benzene and some derivatives - Part 1: Head-space gas chromatographic method Qualite de I'eau -- Determination du benzene et de certains derives benzeniques- Partie 1: Methode par chromatographie en phase gazeuse de I'espace de tete Organization for Standardization (Iso) Copyright License number IHS/icC/1996. Not for resale. No part of these Iso documents may be reproduced in any form, electronic retrieval system or otherwise, except as allowed in the copyright law of the country of use, or with the prior written consent of IsO (Case postale 56, 1211 Geneva 20, Switzerland, Fax +41227341079),IHs ortheISoLicensor'smembers. [so Reference number ISO 11423-1:1997(E) Copyright International Organization for Standardization No reproduction or networking permitted without license from IHS Not for Resale ISO 11423-1:1997(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 technicai committees. Each member body interested in a subject for which a technical committee has been established has liaison with Iso, also take part in the work. IsO collaborates closely with the international Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. 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. International Standard ISO 11423-1 was prepared by Technical Committee ISO/TC 147, Water quality, Subcommittee Sc 2, Physical, chemical, biochemical methods. Jso 11423 consists of the following parts, under the general title Water quality --- Determination of benzene and somederivatives: Part 1: Head-space gas chromatographic method Part 2: Method using extraction and gas chromatography Annexes A, B, C and D of this part of ISO 11423 are for information only. @ISO1997 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 the publisher. International Organization for Standardization Casepostale56CH-1211Geneve20.Switzerland Internet [email protected] X.400 C=ch; a=400net; p=iso; 0=isocs; S=central PrintedinSwitzerland Copyright International Organization for Standardizatior Not for Resale ISO 11423-1:1997(E) @ ISO Introduction This part of IsO 11423 describes a head-space method of sample treatment for the gas chromatographic determination of benzene and some of its derivatives in water. For an extraction procedure followed by gas chromatography, see IsO 11423-2. Which of these methods is applicable in a given case depends for instance on the type of sample to be analysed and the instruments available to the analyst. The method used is then described in the test report. ii Copyright Intermational Organization for Standardization No reprodu Provided by IHS u nittedwithout licensefrom IHS Not for Resale