1、 TECHNICAL REPORT IEC TR 62432 First edition2006-03 The rH index in aqueous and aqueous-organic media Reference number IEC/TR 62432:2006(E)LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.Publication numbering As from 1 January 1997 all
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8、EFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.TECHNICAL REPORT IECTR 62432 First edition2006-03 The rH index in aqueous and aqueous-organic media PRICE CODE IEC 2006 Copyright-all rights reserved No part of this publication may be reproduced or utilized in any form or by any
9、 means,electronic or mechanical,including photocopying and microfilm,without permission in writing from the publisher.International Electrotechnical Commission,3,rue de Varemb,PO Box 131,CH-1211 Geneva 20,SwitzerlandTelephone:+41 22 919 02 11 Telefax:+41 22 919 03 00 E-mail:inmailiec.ch Web:www.iec.
10、ch N For price,see current catalogueCommission Electrotechnique InternationaleInternational Electrotechnical Commission LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 TR 62432 IEC:2006(E)CONTENTS FOREWORD.3 INTRODUCTION.5 1 Scope.6
11、2 General principles.6 2.1 Redox couples,redox equilibria,redox potentials,redox systems.6 2.2 The rH value.7 2.3 rH Standards for use in water and aqueous-organic solvent mixtures.11 2.4 Electrodes for the operational rH cell.12 2.4.1 General.12 2.4.2 The glass electrode.12 2.4.3 The inert noble-me
12、tal electrode(Pt or Au).12 2.5 rH Scales in diverse solvents.12 2.6 Pourbaixs diagrams for the triad rH pH EO|R.13 3 Instrumentation.13 Bibliography.14 Figure 1 Pourbaixs diagram for the triad rH pH EO|R for some key redox systems.10 Table 1.6 Table 2 Some reference aqueous solutions proposed as rH-
13、metric standards rHS 8,9 at 25 C and for the calibration of the redox electrode at EO|R.11 Table 3 Values of(EQHY EH+|H2)6 with corresponding rHS values,at various temperatures,valid for any solvent(water W,or aquo-organic mixture Z=W+S compatible with Quinhydrone)in non-alkaline solution.12 Table 4
14、 Parallelisms between the aqueous pH-metric and rH-metric scales.11 LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.TR 62432 IEC:2006(E)3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ THE rH INDEX IN AQUEOUS AND AQUEOUS-ORGANIC MEDIA FOR
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