SIST EN ISO 17226-1:2021

SLOVENSKI STANDARD
SIST EN ISO 17226-1:2021
01-maj-2021
Nadomešča:
SIST EN ISO 17226-1:2019
Usnje - Kemijsko določevanje formaldehida - 1. del: Metoda s tekočinsko
kromatografijo visoke ločljivosti (ISO 17226-1:2021)
Leather - Chemical determination of formaldehyde content - Part 1: Method using high-
performance liquid chromatography (ISO 17226-1:2021)
Leder - Chemische Bestimmung des Formaldehydgehalts - Teil 1: Verfahren mittels
Flüssigkeitschromatographie (ISO 17226-1:2021)
Cuir - Dosage chimique du formaldéhyde - Partie 1: Méthode par chromatographie en
phase liquide à haute performance (ISO 17226-1:2021)
Ta slovenski standard je istoveten z: EN ISO 17226-1:2021
ICS:
59.140.30 Usnje in krzno Leather and furs
71.040.50 Fizikalnokemijske analitske Physicochemical methods of
metode analysis
SIST EN ISO 17226-1:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 17226-1:2021

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SIST EN ISO 17226-1:2021


EN ISO 17226-1
EUROPEAN STANDARD

NORME EUROPÉENNE

March 2021
EUROPÄISCHE NORM
ICS 59.140.30 Supersedes EN ISO 17226-1:2019
English Version

Leather - Chemical determination of formaldehyde content
- Part 1: Method using high-performance liquid
chromatography (ISO 17226-1:2021)
Cuir - Dosage chimique du formaldéhyde - Partie 1: Leder - Chemische Bestimmung des
Méthode par chromatographie en phase liquide à haute Formaldehydgehalts - Teil 1: Verfahren mittels
performance (ISO 17226-1:2021) Flüssigkeitschromatographie (ISO 17226-1:2021)
This European Standard was approved by CEN on 12 February 2021.

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
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 17226-1:2021 E
worldwide for CEN national Members.

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SIST EN ISO 17226-1:2021
EN ISO 17226-1:2021 (E)
Contents Page
European foreword . 3

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SIST EN ISO 17226-1:2021
EN ISO 17226-1:2021 (E)
European foreword
This document (EN ISO 17226-1:2021) has been prepared by Technical Committee IULTCS
"International Union of Leather Technologists and Chemists Societies" in collaboration with Technical
Committee CEN/TC 289 “Leather” the secretariat of which is held by UNI.
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 September 2021, and conflicting national standards
shall be withdrawn at the latest by September 2021.
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.
This document supersedes EN ISO 17226-1:2019.
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 17226-1:2021 has been approved by CEN as EN ISO 17226-1:2021 without any
modification.


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SIST EN ISO 17226-1:2021

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SIST EN ISO 17226-1:2021
INTERNATIONAL ISO
STANDARD 17226-1
IULTCS
IUC 19-1
Third edition
2021-02
Leather — Chemical determination of
formaldehyde content —
Part 1:
Method using high-performance liquid
chromatography
Cuir — Dosage chimique du formaldéhyde —
Partie 1: Méthode par chromatographie en phase liquide à haute
performance
Reference numbers
ISO 17226-1:2021(E)
IULTCS/IUC 19-1:2021(E)
©
ISO 2021

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SIST EN ISO 17226-1:2021
ISO 17226-1:2021(E)
IULTCS/IUC 19-1:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021
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: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved

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SIST EN ISO 17226-1:2021
ISO 17226-1:2021(E)
IULTCS/IUC 19-1:2021(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Conformity . 1
5 Principle . 1
6 Reagents . 2
7 Apparatus . 2
8 Sampling . 3
9 Sample preparation and analysis . 3
9.1 Procedure for the determination of formaldehyde in the stock solution . 3
9.1.1 Preparation of the formaldehyde stock solution . . 3
9.1.2 Determination . 3
9.2 Procedure for the determination of formaldehyde in leather by the HPLC method . 4
9.2.1 Extraction of the leather . . 4
9.2.2 Derivatization with DNPH and determination of formaldehyde in leather
with HPLC . 4
9.2.3 Calibration of HPLC . 4
10 Expression of results . 5
10.1 Calculation of the formaldehyde content in leather samples . 5
10.2 Spiking — determination of recovery rate . 5
10.3 Expression of the results . 6
10.4 Precision . 6
11 Test report . 6
Annex A (informative) Precision: reliability of the HPLC method . 7
Annex B (informative) HPLC conditions. 8
Bibliography . 9
© ISO 2021 – All rights reserved iii

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SIST EN ISO 17226-1:2021
ISO 17226-1:2021(E)
IULTCS/IUC 19-1:2021(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 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 Chemical Test Commission of the International Union of Leather
Technologists and Chemists Societies (IUC Commission, IULTCS) in collaboration with the European
Committee for Standardization (CEN) Technical Committee CEN/TC 289, Leather, the secretariat of
which is held by UNI, in accordance with the agreement on technical cooperation between ISO and CEN
(Vienna Agreement). This document is technically similar to the Colorimetric Section of the method
IUC 19 which was declared an official method at the IULTCS Delegates meeting on 31st May 2003 in
Cancún, Mexico.
IULTCS, originally formed in 1897, is a world-wide organization of professional leather societies to
further the advancement of leather science and technology. IULTCS has three Commissions, which
are responsible for establishing international methods for the sampling and testing of leather. ISO
recognizes IULTCS as an international standardizing body for the preparation of test methods for
leather.
This third edition cancels and replaces the second edition (ISO 17226-1:2018), which has been
technically revised.
The main changes to the previous edition are as follows:
— The listing of reagents in Clause 6 has been reorganised.
— The composition of the dinitrophenylhydrazine (DNPH) solution (6.10) has changed. It no longer
contains concentrated o-phosphoric acid. Under acid conditions some extracted synthetic tanning
agents and resins can continue to release formaldehyde over time, giving incorrect high results.
— With the change in composition of the DNPH solution (6.10), the reaction time limits in the previous
edition are no longer necessary. In 9.2.2 the reaction time and temperature have been increased
to 180 min and 50 °C, respectively. Consequently, the text in 9.2.2, 9.2.3.1 and 9.2.3.2 has been
modified.
— A new Clause 10 has been added.
iv © ISO 2021 – All rights reserved

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SIST EN ISO 17226-1:2021
ISO 17226-1:2021(E)
IULTCS/IUC 19-1:2021(E)
— In Annex A, results of a new collaborative interlaboratory trial are presented.
— Annex B has been technically revised.
A list of all parts in the ISO 17226 series can be fou
...