IEC-TR-62434-2006.pdf
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1、 TECHNICAL REPORT IEC TR 62434 First edition 2006-03 pH measurements in difficult media Definitions, standards and procedures Reference number IEC/TR 62434:2006(E) Copyright International Electrotechnical Commission Provided by IHS under license with IECLicensee=IHS Employees/1111111001, User=Wing,
2、Bernie Not for Resale, 03/10/2007 05:21:17 MSTNo reproduction or networking permitted without license from IHS -,-,- Publication numbering As from 1 January 1997 all IEC publications are issued with a designation in the 60000 series. For example, IEC 34-1 is now referred to as IEC 60034-1. Consolida
3、ted editions The IEC is now publishing consolidated versions of its publications. For example, edition numbers 1.0, 1.1 and 1.2 refer, respectively, to the base publication, the base publication incorporating amendment 1 and the base publication incorporating amendments 1 and 2. Further information
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8、regarding this publication or need further assistance, please contact the Customer Service Centre: Email: custserviec.ch Tel: +41 22 919 02 11 Fax: +41 22 919 03 00 Copyright International Electrotechnical Commission Provided by IHS under license with IECLicensee=IHS Employees/1111111001, User=Wing,
9、 Bernie Not for Resale, 03/10/2007 05:21:17 MSTNo reproduction or networking permitted without license from IHS -,-,- TECHNICAL REPORT IEC TR 62434 First edition 2006-03 pH measurements in difficult media Definitions, standards and procedures PRICE CODE IEC 2006 Copyright - all rights reserved No pa
10、rt of this publication may be reproduced or utilized in any form or by any 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, Switzerland
11、Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmailiec.ch Web: www.iec.ch U For price, see current catalogue Commission Electrotechnique Internationale International Electrotechnical Commission Copyright International Electrotechnical Commission Provided by IHS under license with IE
12、CLicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 05:21:17 MSTNo reproduction or networking permitted without license from IHS -,-,- 2 TR 62434 IEC:2006(E) CONTENTS FOREWORD.3 1 Scope and object5 2 Normative references .5 3 General principles 5 3.1 Terms and definition
13、s5 3.2 Symbols 5 3.3 pH value5 3.4 Standard reference buffer solutions (primary and secondary pH standards) 7 3.5 Widths of normal pH scales or normal pH ranges in the general solvents Z .10 3.6 Electrodes and operating conditions12 4 Solvent media of applicability .14 5 Procedure for specification
14、.14 6 Recommended standard values and ranges of influence quantities 14 7 Verification of values 14 8 Other difficult media for pH determinations.15 Annex A (informative) Values of the Nernstian slope factor k = 2,3026 RT/F.16 Annex B (informative) .17 Annex C (informative) .22 Annex D (informative)
15、 .23 Annex E (informative) .26 Annex F (informative) .27 Bibliography28 Figure 1 Schematic structure of the hydrogen gas electrode and of the AgCl electrode forming the cell (13) 9 Figure 2 Intercomparing widths and relative positions of normal pH scales (with neutral points indicated by halving dot
16、s) in different solvents .11 Table A.1 Values of the Nernstian slope factor k = 2,3026 RT/F.16 Copyright International Electrotechnical Commission Provided by IHS under license with IECLicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 05:21:17 MSTNo reproduction or netw
17、orking permitted without license from IHS -,-,- TR 62434 IEC:2006(E) 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ pH MEASUREMENTS IN DIFFICULT MEDIA DEFINITIONS, STANDARDS AND PROCEDURES FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization
18、comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International
19、Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this
20、preparatory work. International, governmental and non- governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two o
21、rganizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the f
22、orm of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpre
23、tation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or
24、regional publication shall be clearly indicated in the latter. 5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 6) All users should ensure that they have the latest edition of this
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