kSIST FprEN ISO 1158:2025

SLOVENSKI STANDARD
oSIST prEN ISO 1158:2025
01-marec-2025
Polimerni materiali - Homo- in kopolimeri vinilklorida - Določevanje klora (ISO/DIS
1158:2025)
Plastics - Vinyl chloride homopolymers and copolymers - Determination of chlorine
content (ISO/DIS 1158:2025)
Kunststoffe - Vinylchloridhomopolymere und Copolymere - Bestimmung des
Chlorgehalts (ISO/DIS 1158:2025)
Plastiques - Homopolymères et copolymères de chlorure de vinyle - Dosage du chlore
(ISO/DIS 1158:2025)
Ta slovenski standard je istoveten z: prEN ISO 1158
ICS:
83.080.20 Plastomeri Thermoplastic materials
oSIST prEN ISO 1158:2025 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN ISO 1158:2025
oSIST prEN ISO 1158:2025
DRAFT
International
Standard
ISO/DIS 1158
ISO/TC 61/SC 9
Plastics — Vinyl chloride
Secretariat: KATS
homopolymers and copolymers —
Voting begins on:
Determination of chlorine content
2025-01-06
Plastiques — Homopolymères et copolymères de chlorure de
Voting terminates on:
vinyle — Dosage du chlore
2025-03-31
ICS: 83.080.20
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,
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BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
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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 1158:2025(en)
oSIST prEN ISO 1158:2025
ISO/DIS 1158:2025(en)
© ISO 2025
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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Published in Switzerland
ii
oSIST prEN ISO 1158:2025
ISO/DIS 1158:2025(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagents . 1
6 Apparatus . 2
7 Test sample . 4
8 Procedure . 4
9 Expression of results . 7
10 Precision . 7
11 Test report . 7

iii
oSIST prEN ISO 1158:2025
ISO/DIS 1158:2025(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)
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This document was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 9,
Thermoplastics Materials.
This fourth edition cancels and replaces the third edition (ISO 1158:1988), which has been technically
revised.
The main changes are as follows:
— Changed the scope of application of the document(see 1);
— Added the Normative references(see 2);
— Added the Terms and definitions(see 3)
— Changed the unit of concentration of nitric acid solution and added preparation method(see 5.3);
— Added a method for determining the endpoint of titration by potentiometric titration(see 8.1.6, 8.2.5);
— The preparation method of potassium hydroxide solution has been added (see 5.8);
— The regulations for Molotov cocktails have been changed (see 6.4);
— Changed the requirements of filter paper(see 6.8);
— Changed the test procedure for collecting the combustion-based liquid and the amount of liquid collected
in the incendiary bottle method (see 8.2.5);
— Changed the permissible margin of the method B (see 9.2);
A list of all parts in this document 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
oSIST prEN ISO 1158:2025
DRAFT International Standard ISO/DIS 1158:2025(en)
Plastics — Vinyl chloride homopolymers and copolymers —
Determination of chlorine content
WARNING — All precautions shall be taken, particularly those mentioned in the text of the present
International Standard, to protect operators from risks presented by both methods.
1 Scope
This document specifies two methods for the determination of the chlorine content of homopolymers and
copolymers of vinyl chloride, free from plasticizers or additives, namely:
— method A (combustion in a bomb);
— method B (combustion in a flask).
This document is also applicable as a reference method for the determination of chlorine content in other
chlorine-containing polymers(such as chlorinated polyvinyl chloride, polyvinyl chloride, chlorinated
polyethylene and Vinyl chloride-vinyl acetate) without plasticizers and additives.
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 3696, Water for analytical laboratory use — Specification and test methods
ISO 6353-1, Reagents for chemical analysis — Part 1: General test methods
3 Terms and definitions
No terms and definitions are listed in this document.
ISO an
...