Paints and varnishes - Determination of pH value - Part 1: pH electrodes with glass membrane (ISO 19396-1:2017)

ISO 19396-1:2017 specifies a method for laboratory measurement of the pH value of polymer dispersions and coating materials using pH electrodes with a glass membrane.

Beschichtungsstoffe - Bestimmung des pH-Wertes - Teil 1: pH-Elektroden mit Glasmembran (ISO 19396-1:2017)

Dieses Dokument legt ein Verfahren zum Messen des pH Wertes von Polymerdispersionen und Beschichtungsstoffen mit pH Elektroden mit Glasmembran im Labor fest. ISO 19396 2 legt ein Verfahren zum Messen des pH Wertes mit pH Elektroden mit ISFET-Technologie (Ionensensitiver Feldeffekt-Transistor) fest.

Peintures et vernis - Détermination de la valeur pH - Partie 1: Électrodes pH avec membrane de verre (ISO 19396-1:2017)

Le présent document spécifie une méthode de mesure en laboratoire de la valeur de pH des dispersions de polymères et des produits de peinture à l'aide d'électrodes de pH pourvues d'une membrane en verre. L'ISO 19396-2 spécifie une méthode de mesure de la valeur de pH à l'aide d'électrodes de pH dotées de la technologie de transistor à effet de champ sensible aux ions (ISFET).

Barve in laki - Določevanje pH-vrednosti - 1. del: pH-elektrode s stekleno membrano (ISO 19396-1:2017)

General Information

Status
Published
Public Enquiry End Date
01-Aug-2019
Publication Date
09-Mar-2020
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
11-Feb-2020
Due Date
17-Apr-2020
Completion Date
10-Mar-2020

Buy Standard

Standard
SIST EN ISO 19396-1:2020
English language
23 pages
sale 10% off
Preview
sale 10% off
Preview

e-Library read for
1 day

Standards Content (sample)

SLOVENSKI STANDARD
SIST EN ISO 19396-1:2020
01-april-2020
Barve in laki - Določevanje pH-vrednosti - 1. del: pH-elektrode s stekleno
membrano (ISO 19396-1:2017)

Paints and varnishes - Determination of pH value - Part 1: pH electrodes with glass

membrane (ISO 19396-1:2017)
Beschichtungsstoffe - Bestimmung des pH-Wertes - Teil 1: pH-Elektroden mit
Glasmembran (ISO 19396-1:2017)

Peintures et vernis - Détermination de la valeur pH - Partie 1: Électrodes pH avec

membrane de verre (ISO 19396-1:2017)
Ta slovenski standard je istoveten z: EN ISO 19396-1:2020
ICS:
87.040 Barve in laki Paints and varnishes
SIST EN ISO 19396-1:2020 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN ISO 19396-1:2020
---------------------- Page: 2 ----------------------
SIST EN ISO 19396-1:2020
EN ISO 19396-1
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2020
EUROPÄISCHE NORM
ICS 87.040
English Version
Paints and varnishes - Determination of pH value - Part 1:
pH electrodes with glass membrane (ISO 19396-1:2017)

Peintures et vernis - Détermination de la valeur pH - Beschichtungsstoffe - Bestimmung des pH-Wertes -

Partie 1: Électrodes pH avec membrane de verre (ISO Teil 1: pH-Elektroden mit Glasmembran (ISO 19396-

19396-1:2017) 1:2017)
This European Standard was approved by CEN on 4 November 2019.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this

European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references

concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN

member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by

translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 19396-1:2020 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 19396-1:2020
EN ISO 19396-1:2020 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

---------------------- Page: 4 ----------------------
SIST EN ISO 19396-1:2020
EN ISO 19396-1:2020 (E)
European foreword

The text of ISO 19396-1:2017 has been prepared by Technical Committee ISO/TC 35 "Paints and

varnishes” of the International Organization for Standardization (ISO) and has been taken over as

EN ISO 19396-1:2020 by Technical Committee CEN/TC 139 “Paints and varnishes” the secretariat of

which is held by DIN.

This European Standard shall be given the status of a national standard, either by publication of an

identical text or by endorsement, at the latest by August 2020, and conflicting national standards shall

be withdrawn at the latest by August 2020.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,

Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of

North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the

United Kingdom.
Endorsement notice

The text of ISO 19396-1:2017 has been approved by CEN as EN ISO 19396-1:2020 without any

modification.
---------------------- Page: 5 ----------------------
SIST EN ISO 19396-1:2020
---------------------- Page: 6 ----------------------
SIST EN ISO 19396-1:2020
INTERNATIONAL ISO
STANDARD 19396-1
First edition
2017-08
Paints and varnishes — Determination
of pH value —
Part 1:
pH electrodes with glass membrane
Peintures et vernis — Détermination de la valeur pH —
Partie 1: Électrodes pH avec membrane de verre
Reference number
ISO 19396-1:2017(E)
ISO 2017
---------------------- Page: 7 ----------------------
SIST EN ISO 19396-1:2020
ISO 19396-1:2017(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2017, Published in Switzerland

All rights reserved. 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 ISO at the address below or ISO’s member body in the country of

the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved
---------------------- Page: 8 ----------------------
SIST EN ISO 19396-1:2020
ISO 19396-1:2017(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Principle ........................................................................................................................................................................................................................ 5

5 Apparatus and materials.............................................................................................................................................................................. 5

6 Sampling ........................................................................................................................................................................................................................ 8

7 Procedure..................................................................................................................................................................................................................... 8

7.1 Test conditions ........................................................................................................................................................................................ 8

7.2 Calibration .................................................................................................................................................................................................. 8

7.3 Number of determinations ........................................................................................................................................................... 9

7.4 Measuring the pH value ................................................................................................................................................................... 9

8 Evaluation .................................................................................................................................................................................................................... 9

9 Precision ....................................................................................................................................................................................................................... 9

9.1 General ........................................................................................................................................................................................................... 9

9.2 Repeatability limit, r ....................................................................................................................................................................... 9

9.3 Reproducibility limit, R .............................................................................................................................................................10

10 Test report ................................................................................................................................................................................................................10

Annex A (informative) Recommended pH electrodes for different groups of coating

materials, based on the results of interlaboratory tests ..........................................................................................11

Annex B (informative) Determination of precision ...........................................................................................................................13

Bibliography .............................................................................................................................................................................................................................15

© ISO 2017 – All rights reserved iii
---------------------- Page: 9 ----------------------
SIST EN ISO 19396-1:2020
ISO 19396-1:2017(E)
Foreword

ISO (the International Organization for Standardization) is 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 represented 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 this 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 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 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 voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO’s adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following

URL: w w w . i s o .org/ iso/ foreword .html.

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
---------------------- Page: 10 ----------------------
SIST EN ISO 19396-1:2020
ISO 19396-1:2017(E)
Introduction

The pH value of aqueous products is of decisive importance for the product properties and durability.

© ISO 2017 – All rights reserved v
---------------------- Page: 11 ----------------------
SIST EN ISO 19396-1:2020
---------------------- Page: 12 ----------------------
SIST EN ISO 19396-1:2020
INTERNATIONAL STANDARD ISO 19396-1:2017(E)
Paints and varnishes — Determination of pH value —
Part 1:
pH electrodes with glass membrane
1 Scope

This document specifies a method for laboratory measurement of the pH value of polymer dispersions

and coating materials using pH electrodes with a glass membrane. ISO 19396-2 specifies a method

for measuring the pH value using pH electrodes with ion-sensitive field-effect transistor (ISFET)

technology.
2 Normative references

The following documents are referred to in the text in such 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 preparation of test samples
ISO 4618, Paints and varnishes — Terms and definitions

ISO 15528, Paints, varnishes and raw materials for paints and varnishes — Sampling

ISO 80000-9:2009, Quantities and units — Part 9: Physical chemistry and molecular physics

3 Terms and definitions

For the purpose of this document, the 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 http:// www .electropedia .org/
— ISO Online browsing platform: available at http:// www .iso .org/ obp
3.1

measure for the acidic or basic reaction of an aqueous solution or polymer dispersion

Note 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 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.

3.2
pH value
decadal logarithm of the hydrogen ion activity multiplied with (−1)
m ⋅γ 
a  ++
HHm,
 
pH==p a −lg  =−lg
H 00
 
m m
 
 
© ISO 2017 – All rights reserved 1
---------------------- Page: 13 ----------------------
SIST EN ISO 19396-1:2020
ISO 19396-1:2017(E)
with am=⋅γ
++ +
HH m,H
where
is the activity of the hydrogen ion, in mol/kg;
0 is the standard molality (1 mol/kg);
is the activity coefficient of the hydrogen ion;
m,H
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 can be attributed to it. This is based on a worldwide agreement; see ISO 80000-9:2009, Annex C.

3.3
potentiometric measuring chain
combination of electrochemical half cells
3.4
pH (combination) electrode
pH (single-rod) measuring chain

potentiometric measuring chain (3.3) providing a voltage which depends on the pH value (3.2) of the

measuring solution

Note 1 to entry: One of the two electrochemical half cells is the pH measuring electrode, the second is a reference

electrode (3.5) (see Figure 1). Both electrodes can be combined as a single-rod measuring chain in one unit.

Note 2 to entry: An integrated temperature sensor is recommended (see Figure 1).
2 © ISO 2017 – All rights reserved
---------------------- Page: 14 ----------------------
SIST EN ISO 19396-1:2020
ISO 19396-1:2017(E)
Key
1 reference electrode, consisting of 2, 3 and 4 6 reference element
2 reference element 7 glass membrane
3 reference electrolyte 8 internal buffer
4 diaphragm 9 temperature sensor
5 pH measuring electrode, consisting of 6, 7 and 8 U pH proportional voltage
Figure 1 — Design of a pH electrode with glass membrane and temperature sensor
(schematic illustration)

Note 3 to entry: This document refers to pH electrodes with glass membrane. The electrode shaft should be made

of material resistant to chemicals and solvents.
3.5
reference electrode

electrode providing a constant potential which is independent from the pH value (3.2) of the

measuring medium

Note 1 to entry: At present, the most commonly used type is the silver/silver chloride reference electrode, whose

potential is stabilized by a constant concentration of potassium chloride (KCl) in the reference electrolyte (3.7).

3.6
reference element

galvanic cell which dips into the reference electrolyte (3.7) and transmits the reference potential to the

pH meter

Note 1 to entry: The reference elements of the pH measuring electrode and of the reference electrode should be

aligned so that identical temperature characteristics are given.
© ISO 2017 – All rights reserved 3
---------------------- Page: 15 ----------------------
SIST EN ISO 19396-1:2020
ISO 19396-1:2017(E)
3.7
reference electrolyte
aque
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.