prEN ISO 22744-1

• Abstract:

  This document specifies a test method for the qualification and quantification of organotin compounds. This test method is applicable to all types of materials of textile products.; NOTE CEN/TR 16741 defines which materials are applicable to this determination.

• Status: Not Published
• Publication Date: 09-Apr-2028
• ICS: 59.080.01 - Textiles in general
• Technical Committee: CEN/TC 248 - Textiles and textile products
• Drafting Committee: CEN/TC 248/WG 26 - Methods of test for phthalates
• Current Stage: 4020 - Submission to enquiry - Enquiry
• Start Date: 22-Oct-2026
• Completion Date: 22-Oct-2026
• Ref Project: oSIST prEN ISO 22744-1:2026 - Textiles and textile products - Determination of organotin compounds - Part 1: Derivatisation method using gas chromatography (ISO/DIS 22744-1:2026)

• Revises: EN ISO 22744-1:2020 - Textiles and textile products - Determination of organotin compounds - Part 1: Derivatisation method using gas chromatography (ISO 22744-1:2020)
• Effective Date: 26-Nov-2025

SLOVENSKI STANDARD
01-december-2026
Tekstilije in tekstilni izdelki - Ugotavljanje organokositrnih spojin - 1. del: Metoda
derivatizacije s plinsko kromatografijo (ISO/DIS 22744-1:2026)
Textiles and textile products - Determination of organotin compounds - Part 1:
Derivatisation method using gas chromatography (ISO/DIS 22744-1:2026)
Textilien und textile Erzeugnisse - Bestimmung von zinnorganischen Verbindungen - Teil
1: Verfahren mit Derivatisierung und Gaschromatographie (ISO/DIS 22744-1:2026)
Textiles et produits textiles - Détermination des composés organostanniques - Partie 1:
Méthode de dérivation utilisant la chromatographie en phase gazeuse (ISO/DIS 22744-
1:2026)
Ta slovenski standard je istoveten z: prEN ISO 22744-1
ICS:
59.080.01 Tekstilije na splošno Textiles in general
71.040.50 Fizikalnokemijske analitske Physicochemical methods of
metode analysis
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
International
Standard
ISO/DIS 22744-1
ISO/TC 38
Textiles and textile products —
Secretariat: SAC
Determination of organotin
Voting begins on:
compounds —
2026-10-19
Part 1:
Voting terminates on:
2027-01-11
Derivatisation method using gas
chromatography
Textiles et produits textiles — Détermination des composés
organostanniques —
Partie 1: Méthode de dérivation utilisant la chromatographie en
phase gazeuse
ICS: 59.080.01
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 has not been edited by the ISO Central Secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
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STANDARDS MAY ON OCCASION HAVE TO
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RECIPIENTS OF THIS DRAFT ARE INVITED
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NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Reference number
ISO/DIS 22744-1:2026(en)
DRAFT
ISO/DIS 22744-1:2026(en)
International
Standard
ISO/DIS 22744-1
ISO/TC 38
Textiles and textile products —
Secretariat: SAC
Determination of organotin
Voting begins on:
compounds —
Part 1:
Voting terminates on:
Derivatisation method using gas
chromatography
Textiles et produits textiles — Détermination des composés
organostanniques —
Partie 1: Méthode de dérivation utilisant la chromatographie en
phase gazeuse
ICS: 59.080.01
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 has not been edited by the ISO Central Secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2026
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]
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Email: [e-mail]
Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 22744-1:2026(en)
ii
ISO/DIS 22744-1:2026(en)
Contents Page
Foreword .iv
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagents . 2
5.5 Internal standards (IS) .2
5.5.5 Alternative internal standards .3
5.8.1 Sodium acetate, CAS RN®: 127-09-3. .3
5.8.2 Sodium acetate trihydrate, CAS RN®: 6131-90-4. .3
6 Apparatus and materials . 3
7 Preparation of the test sample. 4
8 Procedure . 4
8.1 General .4
8.2 Preparation of the sodium tetraethylborate solution .4
8.3 Preparation of standard solutions .4
8.3.1 General .4
8.3.2 Internal standards — stock solution (1 000 mg/l of organotin cation) .5
8.3.3 Internal standards — Working solution (10 mg/l of organotin cation) .6
8.3.4 Target compounds — Stock solution (1 000 mg/l of organotin cation) .6
8.3.5 Target compounds — Working solution (10 mg/l of organotin cation) .6
8.4 Preparation of the tropolone solution (5 g/l solution of tropolone).6
8.5 Preparation of the buffer solution (pH = 4,5) .6
8.6 Preparation of the calibration solutions .6
8.7 Preparation of the extract of the test specimen .7
8.8 Preparation of the blank solution .7
8.9 Determination with gas chromatography .7
8.9.1 General .7
8.9.2 Determination by GC-MS .8
8.9.3 Determination by GC-MS/MS .8
9 Expression of results . 8
9.1 Calibration .8
9.2 Calculation of the results of individual organotin cations .8
9.3 Detection limit and quantification limit .8
9.4 Reliability of the test method .8
10 Test report . 9
Annex A (informative) Example of instrumental conditions for organotin analysis .10
Annex B (informative) Reliability of the method .13
Bibliography . 14

iii
ISO/DIS 22744-1:2026(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
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 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 the Technical Committee ISO/TC 38, Textiles, in collaboration with 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).
This second edition cancels and replaces the first edition (ISO 22744-1:2020), which has been technically
revised.
The changes are as follows:
— Clause has been added;
— Clause 1 has been revised and the scope has been expanded to explicitly cover textile fibres, yarns,
fabrics, coated fabrics, printed fabrics, plastics and rubber parts of textile products;
— Clause 4 has been revised to include determination by both GC-MS and GC-MS/MS and to better describe
the analytical procedure;
— Clause 4, Table 1 has been amended by a footnote concerning the verification of the presense of
tetraethyltin in a test sample;
— Clause 5 has been restructured and sodium acetate trihydrate has been addded;
— Clause 6 has been revised to include triple quadrupole mass spectrometers (GC-MS/MS) and further
equipment;
— Clause 7 has been revised and clarified;
— Clause 8.3.2 the suggested concentration of the stock solution has been increased;
— Clause 8.3.4 asks the laboartories to decide which target compunds shall be included in the stock solution:
— Clause 8.6 some subclauses have be rephrased;
— Clause 8.9 has been seperated in three subclauses;
— Clause 8.9.1 describes a confirmation procedure for tetraethyltin findings;

iv
ISO/DIS 22744-1:2026(en)
— Clause 8.9.3 on the determination by GC-MS/MS has been added;
— A new Clause 9.1 Calibration has been added:
— The former Clauses 9.1 to 9.5 been substantially revised by replacing the detector response factor (DRF)
approach with calibration-curve-based quantification and by simplifying the calculation procedure and
have become Clause 9.2;
— The former Clauses 9.6 has become Clauses 9.3;
— Clause 9.4 Reliability of the test method has been added;
— Clause Clause 10 has been rephrased;
— Annex A has been restructured;
— Former Table 3 has become Table A.1;
— Clause A.3 Example of conditions for a triple quadrupole mass spectrometer (MS/MS) has been added;
— Bibliography references cited in the Clause have been added.
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.

v
ISO/DIS 22744-1:2026(en)
Introduction
Certain organotin compounds have been identified as toxic, reproduction toxic and endocrine disruptors.
Thus, several countries have restricted them in articles such as textile products, e.g. in the European Union
[1] [2]
by COMMISSION REGULATION (EU) No 276/2010 amending REGULATION (EC) No 1907/2006 .
Further organotin compounds are restricted by textile brands in their restricted substances lists (RSL)
often at lower limits than the legal thresholds in the EU.

vi
DRAFT International Standard ISO/DIS 22744-1:2026(en)
Textiles and textile products — Determination of organotin
compounds —
Part 1:
Derivatisation method using gas chromatography
1 Scope
This document specifies a test method for the qualification and quantification of organotin compounds
by applying gas chromatography coupled with mass spectrometry. It is applicable to textile fibres, yarns,
fabrics, coated fabrics, printed fabrics, plastic, and rubber parts of textile products.
WARNING — The use of this document can involve hazardous materials, operations and equipment.
It does not purport to address all of the safety or environmental problems associated with its use.
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 4787, Laboratory glass and plastic ware — Volumetric instruments — Methods for testing of capacity and
for use
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
4 Principle
The sample is cut into small pieces and extracted with a methanol/ethanol mixture containing tropolone
as a complexing agent, in a sealed vial at 60 °C, in an ultrasonic bath. The polar and high-boiling organotin
compounds in the extract are then converted to the corresponding volatile alkyl derivatives, by reaction
with sodium tetraethylborate, NaB(Et) . The volatile organo tin alkyl derivates are qualified and quantified
by using a gas chromatograph coupled to a single quadrupole mass spectrometer (GC-MS) or a gas
chromatograph coupled to a triple quadrupole mass spectrometer (GC-MS/MS)].
Table 1 indicates the list of target compounds which can be analysed with the method specified in this
document. This document is also applicable for further organotin compounds provided that the method is
validated with the additional compounds.

ISO/DIS 22744-1:2026(en)
Table 1 — List of target compounds that can be analysed and internal standards
CAS Registry
a
Number®
Type of target compound Target compound
(CAS RN®)
Internal standard: n-Heptyltin trichloride 59344–47–7
Methyltin trichloride 993–16–8
Mono-substituted n-Butyltin trichloride 1118–46–3
n-Octyltin trichloride 3091–25–6
Phenyltin trichloride 1124–19–2
Internal standard: Di-n-heptyltin dichloride 74340–12–8
Dimethyltin dichloride 753–73–1
Di-n-propyltin dichloride 867–36–7
Disubstituted
Di-n-butyltin dichloride 683–18–1
Di-n-octyltin dichloride 3542–36–7
Diphenyltin dichloride 1135–99–5
Internal standard: Tri-n-pentyltin chloride 3342–67–4
Trimethyltin chloride 1066–45–1
Tri-n-propyltin chloride 2279–76–7
b
Trisubstituted Tri-n-butyltin chloride 1461–22–9
Tri-n-octyltin chloride 2587–76–0
Triphenyltin chloride 639–58–7
Tricyclohexyltin chloride 3091–32–5
Internal standard: Tetra-n-propyltin 2176–98–9
c
Tetrasubstituted Tetraethyltin 597–64–8
Tetra-n-butyltin 1461–25–2
a
CAS Registry Number® (CAS RN®) is a trademark of the American Chemical Society (ACS). This information is given for the
convenience of users of this document and does not constitute an endorsement by ISO of the product named.
b
If bis(tri-n-butyltin)oxide (TBTO), CAS RN® 56–35–9, is present, it is detected as tri-n-butyltin.
c
If mono-, di-, and triethyltinchloride are present in a test specimen they are converted to tetraethyltin by sodium
tetraethylborate. If requiered by the test order, findings of tetraethyltin shall be confirmed by reprocessing the test specimen
(8.7) without performing 8.7.8 (i.e. without adding sodium tetraethylborate).
5 Reagents
Unless otherwise specified, use only reagents of recognized analytical grade and certified reference
standards.
5.1 Sodium tetraethylborate, CAS RN®: 15523-24-7.
5.2 Tetrahydrofuran (THF), stabilized, CAS RN®: 109-99-9.
5.3 Inert gas, e.g. nitrogen or argon.
5.4 Organotin compounds, listed in Table 1.
5.5 Internal standards
...