SIST EN ISO 20999:2026

Textiles - Determination of total halogens in textile products - Combustion and ion chromatography (C-IC) test method (ISO 20999:2026)

This document specifies a test method for the determination of total amount of halogens (including fluorine, chlorine, bromine and iodine) present in textile products by combustion and ion chromatography (C-IC).
This document is applicable to all materials of textile products which are combustible, e.g. fibres, fabrics, plastic components (including coating), wood.

Textilien - Bestimmung der Gesamthalogene aus textilen Erzeugnissen - Verfahren mittels Verbrennungs-Ionenchromatographie (C-IC) (ISO 20999:2026)

Textiles - Détermination des halogènes totaux présents dans les produits textiles - Méthode par combustion et chromatographie ionique (C-CI) (ISO 20999:2026)

Le présent document spécifie une méthode d’essai pour la détermination de la quantité totale d’halogènes (y compris le fluor, le chlore, le brome et l’iode) présents dans les produits textiles par combustion et chromatographie ionique (C-CI).
Le présent document s’applique à tous matériaux de produits textiles qui sont combustibles, tels que des fibres, des étoffes, des composants plastiques (y compris des enductions), du bois.

Tekstilije - Določanje skupnih halogenov v tekstilnih izdelkih - Preskusna metoda z zgorevanjem in ionsko kromatografijo (C-IC) (ISO 20999:2026)

Ta dokument določa preskusno metodo za določanje skupne količine halogenov (vključno s fluorom, klorom, bromom in jodom) v tekstilnih izdelkih s pomočjo sežiga in ionske kromatografije (C-IC).
Ta dokument je uporaben za vse materiale tekstilnih izdelkov, ki so gorljivi, npr. vlakna, tkanine, plastične komponente (vključno s prevlekami), les.

General Information

• Status: Published
• Public Enquiry End Date: 23-Sep-2025
• Publication Date: 15-Jun-2026
• ICS: 59.080.01 - Textiles in general
• Technical Committee: ITEK - Textile and textile products
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 02-Jun-2026
• Due Date: 07-Aug-2026
• Completion Date: 16-Jun-2026
• Ref Project: EN ISO 20999:2026 - Textiles - Determination of total halogens in textile products - Combustion and ion chromatography (C-IC) method (ISO 20999:2026)

Overview

SIST EN ISO 20999:2026 – Textiles – Determination of total halogens in textile products – Combustion and ion chromatography (C-IC) test method – establishes a standardized procedure for determining the total content of halogens (including fluorine, chlorine, bromine, and iodine) in textile products. The standard, developed by SIST and aligned with ISO 20999:2026, applies to all combustible components of textile products, such as fibers, fabrics, plastic parts (including coatings), and wood. By using combustion followed by ion chromatography (C-IC), this method enables reliable quantitative measurement of halogens, essential for ensuring product safety, regulatory compliance, and environmental protection within the textile industry.

Key Topics

• Test Methodology: The standard specifies the use of combustion in an oxygen-rich environment to decompose the sample, followed by absorption of resulting gases and analysis by ion chromatography to quantify halogen content.
• Scope of Materials: Applicable to all combustible materials in textile products-ranging from synthetic and natural fibers to plastic elements and coated surfaces.
• Halogens Covered: Accurate assessment of total fluorine, chlorine, bromine, and iodine, regardless of their chemical form in the sample.
• Test Apparatus: Outlines necessary laboratory equipment, including a combustion system, ion chromatograph with conductivity detector, analytical balance, and glassware.
• Reporting Requirements: Specifies minimum information to be included in test reports, such as sample identification, halogen content expressed in mg/kg, testing conditions, deviations, and date of analysis.
• Reliability Data: Presents interlaboratory trial results for the repeatability and reproducibility of the method, underscoring its reliability for chlorinated, brominated, or fluorinated textile analysis.

Applications

The standardized C-IC method supports a wide range of textile industry needs, including:

• Quality Control and Certification: Verifying products for low or controlled halogen levels, crucial for meeting both international regulations and eco-label requirements.
• Regulatory Compliance: Supporting adherence to global environmental and product safety legislation, such as restrictions on hazardous substances in consumer goods.
• Supply Chain Management: Providing a reliable test method for manufacturers, suppliers, and buyers to assess the chemical composition of textile materials and components.
• Research and Development: Facilitating material screening and process optimization in the development of textiles with specific chemical profiles or advanced safety features.
• Environmental Protection: Assisting in monitoring and reducing the release of toxic halogen compounds during textile production, processing, and disposal.

Related Standards

For comprehensive compliance and best practices in textile testing and analysis, consider these related standards:

• ISO 3696: Water for analytical laboratory use - Specification and test methods
• ISO 3071: Textiles - Determination of pH of aqueous extract
• ISO 1833 series: Textiles - Quantitative chemical analysis
• ISO 14184-1: Textiles - Determination of formaldehyde release
• ISO 17075: Leather - Chemical tests - Determination of chromium content

Practical Value

Adopting SIST EN ISO 20999:2026 ensures consistency and accuracy in determining total halogen content in textile products. This benefits:

• Manufacturers seeking to ensure product conformity before market release.
• Testing laboratories performing routine or accreditation-critical analyses.
• Regulatory authorities monitoring compliance with health and environmental standards.
• Retailers and brands requiring transparent, traceable product quality insight throughout their supply chains.

By implementing standardized methods such as combustion and ion chromatography for halogen determination, organizations strengthen product quality, consumer safety, and environmental stewardship across the textile sector.

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2026
Tekstilije - Ugotavljanje skupne vsebnosti halogenov v tekstilnih izdelkih -
Preskusna metoda zgorevanja in ionske kromatografije (C-IC) (ISO 20999:2026)
Textiles - Determination of total halogens in textile products - Combustion and ion
chromatography (C-IC) test method (ISO 20999:2026)
Textilien - Bestimmung der Gesamthalogene aus textilen Erzeugnissen - Verfahren
mittels Verbrennungs-Ionenchromatographie (C-IC) (ISO 20999:2026)
Textiles - Détermination des halogènes totaux présents dans les produits textiles -
Méthode par combustion et chromatographie ionique (C-CI) (ISO 20999:2026)
Ta slovenski standard je istoveten z: EN ISO 20999:2026
ICS:
59.080.01 Tekstilije na splošno Textiles in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 20999
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2026
EUROPÄISCHE NORM
ICS 59.080.01
English Version
Textiles - Determination of total halogens in textile
products - Combustion and ion chromatography (C-IC)
method (ISO 20999:2026)
Textiles - Détermination des halogènes totaux présents Textilien - Bestimmung der Gesamthalogene aus
dans les produits textiles - Méthode par combustion et textilen Erzeugnissen - Verfahren mittels
chromatographie ionique (C-CI) (ISO 20999:2026) Verbrennungs-Ionenchromatographie (C-IC) (ISO
20999:2026)
This European Standard was approved by CEN on 26 April 2026.

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, Türkiye 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
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 20999:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 20999:2026) has been prepared by Technical Committee ISO/TC 38 "Textiles"
in collaboration with Technical Committee CEN/TC 248 “Textiles and textile products” the secretariat of
which is held by BSI.
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 November 2026, and conflicting national standards
shall be withdrawn at the latest by November 2026.
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.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
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, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 20999:2026 has been approved by CEN as EN ISO 20999:2026 without any modification.

International
Standard
ISO 20999
First edition
Textiles — Determination
2026-04
of total halogens in textile
products — Combustion and ion
chromatography (C-IC) method
Textiles — Détermination des halogènes totaux présents dans les
produits textiles — Méthode par combustion et chromatographie
ionique (C-CI)
Reference number
ISO 20999:2026(en) © ISO 2026
ISO 20999:2026(en)
© ISO 2026
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
ISO 20999:2026(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagents and materials . 1
5.1 Water .1
5.2 Halide salts .2
5.3 Standard solutions .2
5.3.1 General .2
5.3.2 Standard stock solutions .2
5.3.3 Standard working solution .2
5.3.4 Calibration solutions .2
5.4 Eluent .3
5.5 Absorption solution . .3
5.6 Oxygen .3
6 Apparatus . 3
7 Preparation of test specimen . 4
8 Procedure . 4
8.1 Combustion by separate combustion device .4
8.2 Determination by separate ion chromatograph (IC) .4
8.3 Determination by combustion device coupled to an ion chromatograph (C-IC) .4
9 Expression of results . 4
9.1 Calculation .4
9.2 Limit of quantification (LOQ) .5
9.3 Reliability of the test method .5
10 Test report . 5
Annex A (informative) Combustion device . 6
Annex B (informative) Ion chromatographic analysis . 9
Annex C (informative) Reliability of method .11

iii
ISO 20999:2026(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
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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 document 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
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This document was prepared by Technical Committee TC 38, Textiles, in collaboration with the European
Committee for Standardization (CEN) Technical Committee CEN/TC 248, Textiles and textile products, in
accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
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 20999:2026(en)
Introduction
The determination of the total content of various halogens can be used as a screening method for harmful
substances whose constituents include one or more of these halogens. For example, the fluorine content of
a textile can indicate that it contains legally restricted perfluorinated and polyfluorinated alkyl substances
(PFAS) or other organic fluorine. High chlorine and bromine concentrations can indicate the potential
presence of flame retardants or biocides in the textile. It should be noted that the test method is not able to
distinguish betw
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