United Nations Environment Programme Analytical Methods for Environmental Water Quality Global Environment Monitoring System with Analytical Methods for Environmental Water Quality Prepared and published by the United Nations Environment Programme Global Environment Monitoring System (GEMS)/Water Programme, in collaboration with the International Atomic Energy Agency. © 2004 United Nations Environment Programme Global Environment Monitoring System/Water Programme and International Atomic Energy Agency. This document may be reproduced in whole or in part in any form for educational or not-for-profit purposes, without special permission from the copyright holders, provided that acknowledgement of the source is made. GEMS/Water would appreciate receiving a copy of any publication that uses this reference guide as a source. No use of this publication may be made for resale or for any other commercial purpose whatsoever, without prior written permission from GEMS/Water and IAEA. The contents of this publication do not necessarily reflect the views of UNEP, of UNEP GEMS/Water Programme, or of IAEA, nor do they constitute any expression whatsoever concerning the legal status of any country, territory, city, of its authorities, or of the delineation of its frontiers or boundaries. A PDF version of this document may be downloaded from the GEMS/Water website at http://www.gemswater.org/quality_assurance/index-e.html UN GEMS/Water Programme Office c/o National Water Research Institute 867 Lakeshore Road Burlington, Ontario, L7R 4A6 CANADA website: http://www.gemswater.org tel: +1-905-336-4919 fax: +1-905-336-4582 email:
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