1、INTERNATIONALSTANDARDIEC60746-2Second edition2003-01Expression of performance ofelectrochemical analyzers Part 2:pH valueExpression des qualits de fonctionnementdes analyseurs lectrochimiques Partie 2:Mesure du pHReference numberIEC 60746-2:2003(E)LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTER
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8、 Customer Service Centre:Email:custserviec.chTel:+41 22 919 02 11Fax:+41 22 919 03 00LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.INTERNATIONALSTANDARDIEC60746-2Second edition2003-01Expression of performance ofelectrochemical analyz
9、ers Part 2:pH valueExpression des qualits de fonctionnementdes analyseurs lectrochimiques Partie 2:Mesure du pH IEC 2003 Copyright-all rights reservedNo part of this publication may be reproduced or utilized in any form or by any means,electronic ormechanical,including photocopying and microfilm,wit
10、hout 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.chSFor price,see current cataloguePRICE CODECommission Electrotechnique
11、InternationaleInternational Electrotechnical Commission LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 60746-2 IEC:2003(E)CONTENTSFOREWORD.41Scope.62Normative reference.63Definitions.64Procedure for specification.84.1Additional stat
12、ements on sensor units and analyzers.94.2Additional statements on electronic units.94.3Statements on sensors.104.3.1General.104.3.2Reference electrodes.104.3.3pH sensor.104.3.4Temperature compensator.104.3.5Auxiliary devices for sensor unit.105Recommended standard values and ranges of influence quan
13、tities affecting theperformance of electronic units.116Verification of values.116.1General aspects.116.2Test procedures for electronic units.116.2.1pH scaling.116.2.2Isopotential pH,pHi.126.2.3Temperature compensation.126.3Test procedures for sensor units.126.3.1Zero point pH.126.3.2Percentage theor
14、etical slope,PTS.126.3.3Isopotential pH,pH i.126.4Test procedures for analyzers.126.4.1Intrinsic uncertainty.136.4.2Linearity uncertainty.136.4.3Repeatability.136.4.4Output fluctuation.136.4.5Warm-up time.136.4.6Drift.136.4.7Response times.136.4.8Sample temperature.136.4.9Primary influence quantitie
15、s.13Bibliography.21Annex A(informative).15Annex B(informative)Reference buffer solutions:pH as a function of temperature.16Annex C(normative)Alternative procedures for measuring response times:delay(T10),rise(fall)(Tr,Tf)and 90%(T90)times.19LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE
16、 AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.60746-2 IEC:2003(E)3 Figure C.1 Relation between T10,Tr(Tf)and T90.19Table A.1 Values of the slope factor,k=2,3026 R.T/F.15Table B.1 Values of reference pH buffer solutions at various temperatures.17Table B.2 Composition of reference pH buffer solutions.18LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.4 60746-2 IEC:2003(E)INTERNATIONAL ELECTROTECHNICAL COMMISSION_EXPRESSION OF
