oSIST prEN ISO 19396-1:2024

Paints and varnishes - Determination of pH value - Part 1: pH electrodes with glass membrane (ISO/DIS 19396-1:2024)

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. ISO 19396‑2 specifies a method for measuring the pH value using pH electrodes with ion-sensitive field-effect transistor (ISFET) technology.

Beschichtungsstoffe - Bestimmung des pH-Wertes - Teil 1: pH-Elektroden mit Glasmembran (ISO/DIS 19396-1:2024)

Peintures et vernis - Détermination de la valeur de pH - Partie 1: Électrodes de pH à membrane en verre (ISO/DIS 19396-1:2024)

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 - Določanje pH-vrednosti - 1. del: pH-elektrode s stekleno membrano (ISO/DIS 19396-1:2024)

General Information

• Status: Not Published
• Public Enquiry End Date: 19-Sep-2024
• ICS: 87.040 - Paints and varnishes
• Technical Committee: IBLP - Paints and varnishes
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 19-Jul-2024
• Due Date: 06-Dec-2024
• Ref Project: prEN ISO 19396-1 - Paints and varnishes - Determination of pH value - Part 1: pH electrodes with glass membrane (ISO/DIS 19396-1:2024)

Relations

• Revises: SIST EN ISO 19396-1:2020 - Paints and varnishes - Determination of pH value - Part 1: pH electrodes with glass membrane (ISO 19396-1:2017)
• Effective Date: 01-Sep-2024

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2024
Barve in laki - Določanje pH-vrednosti - 1. del: pH-elektrode s stekleno membrano
(ISO/DIS 19396-1:2024)
Paints and varnishes - Determination of pH value - Part 1: pH electrodes with glass
membrane (ISO/DIS 19396-1:2024)
Beschichtungsstoffe - Bestimmung des pH-Wertes - Teil 1: pH-Elektroden mit
Glasmembran (ISO/DIS 19396-1:2024)
Peintures et vernis - Détermination de la valeur de pH - Partie 1: Électrodes de pH à
membrane en verre (ISO/DIS 19396-1:2024)
Ta slovenski standard je istoveten z: prEN ISO 19396-1
ICS:
87.040 Barve in laki Paints and varnishes
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
International
Standard
ISO/DIS 19396-1
ISO/TC 35/SC 9
Paints and varnishes —
Secretariat: BSI
Determination of pH value —
Voting begins on:
Part 1: 2024-07-04
pH electrodes with glass membrane
Voting terminates on:
2024-09-26
Peintures et vernis — Détermination de la valeur de pH —
Partie 1: Électrodes de pH à membrane en verre
ICS: 87.040
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS.
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Reference number
ISO/DIS 19396-1:2024(en)
DRAFT
ISO/DIS 19396-1:2024(en)
International
Standard
ISO/DIS 19396-1
ISO/TC 35/SC 9
Paints and varnishes —
Secretariat: BSI
Determination of pH value —
Voting begins on:
Part 1:
pH electrodes with glass membrane
Voting terminates on:
Peintures et vernis — Détermination de la valeur de pH —
Partie 1: Électrodes de pH à membrane en verre
ICS: 87.040
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2024
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
BE CONSIDERED IN THE LIGHT OF THEIR
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
or ISO’s member body in the country of the requester.
NATIONAL REGULATIONS.
ISO copyright office
RECIPIENTS OF THIS DRAFT ARE INVITED
CP 401 • Ch. de Blandonnet 8
TO SUBMIT, WITH THEIR COMMENTS,
CH-1214 Vernier, Geneva
NOTIFICATION OF ANY RELEVANT PATENT
Phone: [phone]
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Email: [e-mail]
Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 19396-1:2024(en)
ii
ISO/DIS 19396-1:2024(en)
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 . 7
7 Procedure . 7
7.1 Test conditions .7
7.2 Calibration .8
7.3 Number of determinations .8
7.4 Measuring the pH value .8
8 Evaluation . 8
9 Precision . 8
9.1 General .8
9.2 Repeatability limit, r . .8
9.3 Reproducibility limit, R .9
10 Test report . 9
Annex A (informative) Recommended pH electrodes for different groups of coating materials,
based on the results of interlaboratory tests. 10
Annex B (informative) Determination of precision .12
Bibliography . 14

iii
ISO/DIS 19396-1:2024(en)
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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of 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 www.iso.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.
This second edition cancels and replaces the first edition (ISO 19396-1:2017), which has been technically
revised.
The main changes are as follows:
— definitions for “theoretical slope” and “stability of measured value” have been deleted;
— “measuring medium” has been harmonized to “measuring solution” in the entire text;
— the calibration (7.2) has been clarified;
— the normative references have been updated.
A list of all parts in the ISO 19396 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.

iv
ISO/DIS 19396-1:2024(en)
Introduction
The pH value of aqueous products is of decisive importance for the product properties and durability.

v
DRAFT International Standard ISO/DIS 19396-1:2024(en)
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 — Vocabulary
ISO 15528, Paints, varnishes and raw materials for paints and varnishes — Sampling
ISO 80000-9, Quantities and units — Part 9: Physical chemistry and molecular physics
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 4618, ISO 80000-9 and the
following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
pH
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)
a m ⋅γ
   
++ +
HH H
pH==p a −lg =−lg
   
+
H  00  
m m
   
----------------
...