1、Paints and varnishes Determination of pH valuePart 2: pH electrodes with ISFET technologyBS ISO 193962:2017BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06 ISO 2017Paints and varnishes Determination of pH value Part 2:pH electrodes with ISFET technologyPeintures et v
2、ernis Dtermination de la valeur pH Partie 2: lectrodes pH avec technique ISFETINTERNATIONALSTANDARDISO19396-2First edition2017-08Reference numberISO 19396-2:2017(E)National forewordThis British Standard is the UK implementation of ISO 193962:2017.The UK participation in its preparation was entrusted
3、 to Technical Committee STI/10, Test methods for paints.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The Br
4、itish Standards Institution 2017 Published by BSI Standards Limited 2017ISBN 978 0 580 87393 5ICS 87.040Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 Septe
5、mber 2017.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS ISO 193962:2017 ISO 2017Paints and varnishes Determination of pH value Part 2: pH electrodes with ISFET technologyPeintures et vernis Dtermination de la valeur pH Partie 2: lectrodes pH avec technique ISFETI
6、NTERNATIONAL STANDARDISO19396-2First edition2017-08Reference numberISO 19396-2:2017(E)BS ISO 193962:2017ISO 19396-2:2017(E)ii ISO 2017 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2017, Published in SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be
7、 reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the req
8、uester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 193962:2017ISO 19396-2:2017(E)ii ISO 2017 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2017, Published in SwitzerlandAll rights r
9、eserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either
10、 ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgISO 19396-2:2017(E)Foreword ivIntroduction v1 Scope . 12 Normative refer
11、ences 13 Terms and definitions . 14 Principle 55 Apparatus and materials 56 Sampling 87 Procedure. 97.1 Test conditions 97.2 Calibration 97.3 Number of determinations . 97.4 Measuring the pH value . 98 Evaluation 99 Precision 109.1 General 109.2 Repeatability limit, r 109.3 Reproducibility limit, R
12、. 1010 Test report 10Annex A (informative) Determination of precision .11Bibliography .13 ISO 2017 All rights reserved iiiContents PageBS ISO 193962:2017ISO 19396-2:2017(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO mem
13、ber bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmen
14、tal and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance
15、are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).Attention
16、 is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and
17、/or on the ISO list of patent declarations received (see www .iso .org/ patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the voluntary nature of standards, the meaning of ISO specific terms an
18、d expressions related to conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www .iso .org/ iso/ foreword .html.This document was prepared by Technical Committee ISO/TC 35,
19、 Paints and varnishes, Subcommittee SC 9, General test methods for paints and varnishes.A list of all parts in the ISO 19396 series can be found on the ISO website.iv ISO 2017 All rights reservedBS ISO 193962:2017ISO 19396-2:2017(E)ForewordISO (the International Organization for Standardization) is
20、a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represent
21、ed on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop t
22、his document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC
23、Directives, Part 2 (see www .iso .org/ directives).Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the
24、 development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www .iso .org/ patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the volunta
25、ry nature of standards, the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www .iso .org/ iso/ foreword .html.
26、This document was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee SC 9, General test methods for paints and varnishes.A list of all parts in the ISO 19396 series can be found on the ISO website.iv ISO 2017 All rights reserved ISO 19396-2:2017(E)IntroductionThe pH value
27、of aqueous products is of decisive importance for the product properties and durability. ISO 2017 All rights reserved vBS ISO 193962:2017Paints and varnishes Determination of pH value Part 2: pH electrodes with ISFET technology1 ScopeThis document specifies a method for measuring the pH value of dis
28、persions and coating materials using pH electrodes with ion-sensitive field-effect transistor (ISFET) technology. ISO 19396-1 specifies a method for measuring the pH value using pH electrodes with a glass membrane.2 Normative referencesThe following documents are referred to in the text in such a wa
29、y that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 1513, Paints and varnishes Examination and preparation of
30、test samplesISO 4618, Paints and varnishes Terms and definitionsISO 15528, Paints, varnishes and raw materials for paints and varnishes SamplingISO 80000-9:2009, Quantities and units Part 9: Physical chemistry and molecular physics3 Terms and definitionsFor the purpose of this document, the terms an
31、d definitions given in ISO 4618 and ISO 80000-9 and the following apply.ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at h t t p :/ www .electropedia .org/ ISO Online browsing platform: available at h t t p :/ www .is
32、o .org/ obp3.1pHmeasure for the acidic or basic reaction of an aqueous solution or polymer dispersionNote 1 to entry: Notation of pH: the p and the H are vertically on one line. The same is valid for pOH.Note 2 to entry: The acidic reaction is determined by the activity of the existing “hydrogen ion
33、s”. The basic reaction is determined by the activity of the existing hydroxide ions. The direct relationship between the activities of the “hydrogen ions” and the hydroxide ions is described by the ionic product of the water.SOURCE: ISO 19396-1:2017, 3.13.2pH valuedecadal logarithm of the hydrogen i
34、on activity multiplied with (1)pH plglgHHHH=+aammmm00,INTERNATIONAL STANDARD ISO 19396-2:2017(E) ISO 2017 All rights reserved 1BS ISO 193962:2017Paints and varnishes Determination of pH value Part 2: pH electrodes with ISFET technology1 ScopeThis document specifies a method for measuring the pH valu
35、e of dispersions and coating materials using pH electrodes with ion-sensitive field-effect transistor (ISFET) technology. ISO 19396-1 specifies a method for measuring the pH value using pH electrodes with a glass membrane.2 Normative referencesThe following documents are referred to in the text in s
36、uch a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 1513, Paints and varnishes Examination and prepara
37、tion of test samplesISO 4618, Paints and varnishes Terms and definitionsISO 15528, Paints, varnishes and raw materials for paints and varnishes SamplingISO 80000-9:2009, Quantities and units Part 9: Physical chemistry and molecular physics3 Terms and definitionsFor the purpose of this document, the
38、terms and definitions given in ISO 4618 and ISO 80000-9 and the following apply.ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at h t t p :/ www .electropedia .org/ ISO Online browsing platform: available at h t t p :/
39、 www .iso .org/ obp3.1pHmeasure for the acidic or basic reaction of an aqueous solution or polymer dispersionNote 1 to entry: Notation of pH: the p and the H are vertically on one line. The same is valid for pOH.Note 2 to entry: The acidic reaction is determined by the activity of the existing “hydr
40、ogen ions”. The basic reaction is determined by the activity of the existing hydroxide ions. The direct relationship between the activities of the “hydrogen ions” and the hydroxide ions is described by the ionic product of the water.SOURCE: ISO 19396-1:2017, 3.13.2pH valuedecadal logarithm of the hy
41、drogen ion activity multiplied with (1)pH plglgHHHH=+aammmm00,INTERNATIONAL STANDARD ISO 19396-2:2017(E) ISO 2017 All rights reserved 1 ISO 19396-2:2017(E)with ammHH H+ +=,whereaH+is the activity of the hydrogen ion, in mol/kg;m0is the standard molality (1 mol/kg);m,H+is the activity coefficient of
42、the hydrogen ion;mH+is the molality of the hydrogen ion, in mol/kg.Note 1 to entry: The pH value is not measurable as a measure of a single ion activity. Therefore, pH (PS) values of solutions of primary reference material (PS, en: Primary Standard) are determined, which are approximate to it and ca
43、n be attributed to it. This is based on a worldwide agreement; see ISO 80000-9:2009, Annex C.SOURCE: ISO 19396-1:2017, 3. 23.3ISFET electrodecombined pH electrode with ISFET technologypotentiometric cell providing a voltage which depends on the pH value (3.2) of the measuring mediumNote 1 to entry:
44、One of the two electrochemical cells is the ISFET; the second is a reference electrode.Note 2 to entry: An integrated temperature sensor is recommended (see Figure 1).2 ISO 2017 All rights reservedBS ISO 193962:2017ISO 19396-2:2017(E)Key1 reference electrode, consisting of 2, 3 and 4 7 opening to th
45、e measuring medium (gate)2 reference element 8 temperature sensor3 reference electrolyte U pH proportional voltage4 diaphragm UDSvoltage receiver/sender (drain/source)5 pH measuring electrode, consisting of 6 and 7 IDScurrent receiver/sender (drain/source)6 ISFET (see Figure 4) Figure 1 Design of an
46、 ISFET electrode (schematic diagram)3.4reference electrodeelectrode providing a constant potential which is independent from the pH value (3.2) of the measuring mediumNote 1 to entry: At present, the most commonly used type is the silver/silver chloride reference electrode, whose potential is stabil
47、ized by a constant concentration of potassium chloride (KCl) in the reference electrolyte (3.6).SOURCE: ISO 19396-1:2017, 3.53.5reference elementgalvanic cell which dips into the reference electrolyte (3.6) and transmits the reference potential to the pH meterSOURCE: ISO 19396-1:2017, 3.6, modified
48、Note 1 to entry has been deleted. ISO 2017 All rights reserved 3BS ISO 193962:2017ISO 19396-2:2017(E)Key1 reference electrode, consisting of 2, 3 and 4 7 opening to the measuring medium (gate)2 reference element 8 temperature sensor3 reference electrolyte U pH proportional voltage4 diaphragm UDSvolt
49、age receiver/sender (drain/source)5 pH measuring electrode, consisting of 6 and 7 IDScurrent receiver/sender (drain/source)6 ISFET (see Figure 4) Figure 1 Design of an ISFET electrode (schematic diagram)3.4reference electrodeelectrode providing a constant potential which is independent from the pH value (3.2) of the measuring mediumNote 1 to entry: At present, the most commonly used type is the silver/silve
