ISO INTERNATIONAL STANDARD 9555-3 First edition 1992-11-01 Measurement of liquid flow in open channels Tracer dilution methods for the measurement of steadyflow- Part 3: Chemicaltracers Mesurededebit des liquidesdans lescanauxdecouverts-- Methodes dedilution enregimepermanentutilisantdestraceurs- Partie3:Traceurs chimiques Referencenumber ISO 9555-3:1992(E) ISO 9555-3:1992(E) Contents Page 1 Scope 2 Normative reference Definitionsandsymbols 3 2 3.1 Definitions 2 3.2 Symbols 2 3.3 Units of measurement 2 4 Tracers used 2 4.1 General 2 4.2 lodide N 4.3 Lithium 2 4.4 Chloride 3 4.5 Chromium 3 5 Tracer measurement 3 5.1 Principles 3 5.2 Field measurement 5 5.3 Laboratorymeasurement 5 6 Environmentalfactors affectingtracers 6.1 Chemicai factors 6.2 Physical factors 8 6.3 Bioiogical factors 7 Techniques fortracerinjection 9 8 Samplingtechniques 6 9 Analysis and sources of error 9 10 Special requirements 9 10.1 lodide 9 ISO 1992 All rights reserved. No part of this publication may be reproduced or utilized in any forn or by any means, electronic or mechanical, including photocopying and microfitm, without permission inwriting from thepublisher. InternationalOrganizationforStandardization CasePostale56·CH-1211Geneve20·Switzerland Printed in Switzerland ii ISO9555-3:1992(E) 10.2 Lithium 10 10.3 Chloride 10 10.4 Chromium 10 Annex A Generalcharacteristicsofcommonlyusedchemicaltracers 11 ili