ISO INTERNATIONAL STANDARD 6468 First edition 1996-12-15 Water quality - Determination of certain organochlorine insecticides, polychlorinated biphenyls and chlorobenzenes -- Gas chromatographic method after liquid-liquid extraction Qualite de I'eau - Dosage de certains insecticides organochlores, des polychlorobiphenyles et des chlorobenzenes - Methode par chromatographie en phase gazeuse apres extraction liquide-liquide This material is reproduced from Iso documents under International 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 +41 22 7341079),IHsortheIsoLicensor'smembers. ISO Reference number ISO 6468:1996(E) Copyright International Organization for Standardization No reproduction or networking permitted without license from IHS Not for Resale ISO 6468:1996(E) Foreword ISO (the International Organization for Standardization) is a worldwide fed- eration of national standards bodies (IsO member bodies). The work of preparing International Standards is normally carried out through 1so technical committees. Each member body interested in a subject for which a technicai committee has been established has the right to be represented on that committee. International organizations, governmental and non- governmental, in liaison with isO, also take part in the work. IsO collab- orates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are cir- culated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. 1nternational Standard ISO 6468 was prepared by Technical Committee ISO/TC 147, Water quality, Subcommittee SC 2, Physical, chemical, bio- chemicalmethods. Annex A forms an integral part of this International Standard. Annexes B to H are for information only. @ISO1996 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced microfilm, withoutpermission in writing from the publisher. International Organization for Standardization CasePostale56CH-1211Geneve20·Switzerland Printed in Switzerland ii Crowriah bwtenational Organizatinfor Standadizaton d without license from IHS Not for Resale ISO 6468:1996(E) INTERNATIONALSTANDARD ISO Water quality Determination of certain organochlorine insecticides, polychlorinated biphenyls and chlorobenzenes Gas chromatographic method after liquid-liquid extraction WARNING AND SAFETY PRECAUTIONS - This method makes use of flammable and toxic organic sol- vents. Observe the safety regulations in effect. The electron-capture detector (EcD) contains radionuclides. Adequate safety precautions and legal re- quirements must be observed. The halogenated hydrocarbons and chloropesticides, used for the preparation of the calibration standards Scope T 2 Normative references This Internationat Standard describes a method for The following standards contain provisions which determining certain organochiorine insecticides, poly- through reference in this text, constitute provisions of chlorinated biphenyls (PCBs) and chlorobenzenes this International Standard.Atthe time of publication, (except the mono- and dichlorobenzenes) in drinking the editionsindicated were valid.All standards are waters, ground waters, surface waters and waste subject to revision, and parties to agreements based waters. on the International Standard are encouraged to in- vestigate the possibility of applying the most recent The method is applicable to samples containing up to editions of the standards indicated below. Members of 0,05 g/l of suspended solids. In the presence of or- IEC and ISO maintain registers of currently valid Inter- ganic