ISO INTERNATIONAL STANDARD 11423-2 First edition 1997-06-01 Water quality -- Determination of benzene and some derivatives Part 2: Method using extraction and gas chromatography Qualite de I'eau -- Determination du benzene et de certains derivés benzéniques This material is reproduced from Iso documents under International 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 written consent of Iso (Case postale 56, 1211 Geneva 20, Switzerland, Fax +41227341079),IHSor theISOLicensor'smembers. Reference number ISO11423-2:1997(E) Copyright International Organization for Standardization license with ISC No reproduction c Not for Resale ISO 11423-2:1997(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 technical committees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhas Commission (IEC) on all matters of electrotechnical standardization. Draft international Standards adopted by the technical committees are circulated to the member bodies for voting international Subcommittee SC 2, Physical, chemical, biochemical methods. IsO 11423 consists of the following parts, under the general title Water quality -- Determination of benzene and some derivatives: Part 1: Head-space gas chromatographic method Part 2: Method using extraction and gas chromatography Annexes A, B and C of this partof ISO11423 are for information only. @ISO1997 microfilm, without permission in writing from the publisher. InternationalOrganizationforStandardization Case postale 56 : CH-1211 Geneve 20 . Switzerland Internet [email protected] X.400 C=ch; a=400net; p=iso; 0=isocs; S=central Printed in Switzerland Not for Resale ISO 11423-2:1997(E) @ISO Introduction This part of IsO 11423 describes an extraction method of sample treatment followed by the gas chromatography for the determination of benzene and derivatives in water. Fora head-space procedure see Iso 11423-1. 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 Nreructionneworkingemitewithuliceefrm Not for Resale