SIST EN ISO 17226-2:2009
(Main)Leather - Chemical determination of formaldehyde content - Part 2: Method using colorimetric analysis (ISO 17226-2:2008)
Leather - Chemical determination of formaldehyde content - Part 2: Method using colorimetric analysis (ISO 17226-2:2008)
This part of ISO 17226 specifies a method for the determination of free and released formaldehyde in leathers. This method is based on colorimetric analysis. The formaldehyde content is taken to be the quantity of free-formaldehyde and formaldehyde extracted through hydrolysis contained in a water extract from the leather under standard conditions. This process is not absolutely selective for formaldehyde. Other compounds such as extracted dyes could interfere at 412 nm.
Leder - Chemische Bestimmung des Formaldehydgehalts - Teil 2: Kolorimetrische Analyse (ISO 17226-2:2008)
Dieser Teil von ISO 17226 legt ein Verfahren zur Bestimmung von freiem und freigesetztem Formaldehyd in Leder fest. Dieses Verfahren beruht auf kolorimetrischer Analyse.
Formaldehydgehalt ist die Menge an freiem Formaldehyd und durch Hydrolyse freigesetztem Formaldehyd, der in einem wässrigen Extrakt, der unter standardisierten Bedingungen erhalten wurde, enthalten ist.
Dieses Verfahren ist nicht vollständig selektiv für Formaldehyd. Andere Bestandteile wie extrahierte Farbstoffe können bei 412 nm ebenfalls interferieren.
Cuir - Dosage chimique du formaldéhyde - Partie 2 : Méthode par analyse colorimétrique (ISO 17226-2:2008)
L'ISO 17226-2:2008 spécifie une méthode permettant de doser le formaldéhyde libre et le formaldéhyde dégagé dans les cuirs. Cette méthode est fondée sur l'analyse colorimétrique.
La teneur en formaldéhyde se définit par hypothèse comme la quantité de formaldéhyde libre et de formaldéhyde extrait de l'hydrolyse contenue dans un extrait d'eau provenant du cuir dans des conditions standards.
Ce processus n'est pas absolument sélectif pour le formaldéhyde. D'autres composants tels que des extraits de colorants pourraient se mêler à 412 nm.
Usnje - Kemijsko določevanje formaldehida - 2. del: Analize s kolorimetrijsko metodo (ISO 17226-2:2008)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 17226-2:2009
01-januar-2009
8VQMH.HPLMVNRGRORþHYDQMHIRUPDOGHKLGDGHO $QDOL]HVNRORULPHWULMVNR
PHWRGR ,62
Leather - Chemical determination of formaldehyde content - Part 2: Method using
colorimetric analysis (ISO 17226-2:2008)
Leder - Chemische Bestimmung des Formaldehydgehalts - Teil 2: Kolorimetrische
Analyse (ISO 17226-2:2008)
Cuir - Dosage chimique du formaldéhyde - Partie 2 : Méthode par analyse colorimétrique
(ISO 17226-2:2008)
Ta slovenski standard je istoveten z: EN ISO 17226-2:2008
ICS:
59.140.30 Usnje in krzno Leather and furs
SIST EN ISO 17226-2:2009 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST EN ISO 17226-2:2009
---------------------- Page: 2 ----------------------
SIST EN ISO 17226-2:2009
EUROPEAN STANDARD
EN ISO 17226-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2008
ICS 59.140.30
English Version
Leather - Chemical determination of formaldehyde content - Part
2: Method using colorimetric analysis (ISO 17226-2:2008)
Cuir - Dosage chimique du formaldéhyde - Partie 2: Leder - Chemische Prüfungen - Teil 2: Bestimmung des
Méthode par analyse colorimétrique (ISO 17226-2:2008) Formaldehydgehalts in Leder durch kolorimetrische
Analyse (ISO 17226-2:2008)
This European Standard was approved by CEN on 26 April 2008.
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 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 Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 17226-2:2008: E
worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 17226-2:2009
EN ISO 17226-2:2008 (E)
Contents Page
Foreword.3
2
---------------------- Page: 4 ----------------------
SIST EN ISO 17226-2:2009
EN ISO 17226-2:2008 (E)
Foreword
This document (EN ISO 17226-2:2008) has been prepared by Technical Committee CEN/TC 289 "Leather",
the secretariat of which is held by UNI in collaboration with Technical Committee ISO/TC IULTCS
"International Union of Leather Technologists and Chemists Societies".
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 2008, and conflicting national standards shall be withdrawn
at the latest by November 2008.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
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, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
3
---------------------- Page: 5 ----------------------
SIST EN ISO 17226-2:2009
---------------------- Page: 6 ----------------------
SIST EN ISO 17226-2:2009
INTERNATIONAL ISO
STANDARD 17226-2
IULTCS/IUC
19-2
First edition
2008-05-01
Leather — Chemical determination of
formaldehyde content —
Part 2:
Method using colorimetric analysis
Cuir — Dosage chimique du formaldéhyde —
Partie 2: Méthode par analyse colorimétrique
Reference number
ISO 17226-2:2008(E)
IULTCS/IUC 19-2:2008(E)
©
ISO 2008
---------------------- Page: 7 ----------------------
SIST EN ISO 17226-2:2009
ISO 17226-2:2008(E)
IULTCS/IUC 19-2:2008(E)
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but
shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.
COPYRIGHT PROTECTED DOCUMENT
© ISO 2008
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2008 – All rights reserved
---------------------- Page: 8 ----------------------
SIST EN ISO 17226-2:2009
ISO 17226-2:2008(E)
IULTCS/IUC 19-2:2008(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 17226-2 was prepared by the European Committee for Standardization (CEN) Technical Committee
CEN/TC 289, Leather, in collaboration with the Chemical Test Commission of the International Union of
Leather Technologists and Chemists Societies (IUC Commission, IULTCS), in accordance with the
Agreement on technical cooperation between ISO and CEN (Vienna Agreement). This method 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 sampling and the testing of leather. ISO recognizes IULTCS as an
international standardizing body for the preparation of test methods for leather.
This first edition of ISO 17226-2, together with ISO 17226-1, cancels and replaces ISO/TS 17226:2003, which
has been technically revised.
ISO 17226 consists of the following parts, under the general title Leather — Chemical determination of
formaldehyde content:
⎯ Part 1: Method using high performance liquid chromatography
⎯ Part 2: Method using colorimetric analysis
© ISO 2008 – All rights reserved iii
---------------------- Page: 9 ----------------------
SIST EN ISO 17226-2:2009
---------------------- Page: 10 ----------------------
SIST EN ISO 17226-2:2009
ISO 17226-2:2008(E)
INTERNATIONAL STANDARD
IULTCS/IUC 19-2:2008(E)
Leather — Chemical determination of formaldehyde content —
Part 2:
Method using colorimetric analysis
1 Scope
This part of ISO 17226 specifies a method for the determination of free and released formaldehyde in
leathers. This method is based on colorimetric analysis.
The formaldehyde content is taken to be the quantity of free-formaldehyde and formaldehyde extracted
through hydrolysis contained in a water extract from the leather under standard conditions.
This process is not absolutely selective for formaldehyde. Other compounds such as extracted dyes could
interfere at 412 nm.
2 Conformance
When compared with ISO 17226-1, the two analytical methods should give similar trends but not necessarily
the same absolute result. Therefore, in the case of dispute, ISO 17226-1 shall be used in preference.
3 Normative references
The following referenced documents are indispensable for the application 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 2418, Leather — Chemical, physical and mechanical and fastness tests — Sampling location
ISO 3696:1987, Water for analytical laboratory use — Specification and test methods
ISO 4044, Leather — Chemical tests — Preparation of chemical test samples
ISO 4684, Leather — Chemical tests — Determination of volatile matter
ISO 17226-1, Leather — Chemical determination of formaldehyde content — Part 1: Method using high
performance liquid chromatography
4 Principle
The leather sample is eluted with detergent solution at 40 °C. The eluate is treated with acetylacetone,
whereby formaldehyde reacts to give a yellow compound (3,5-diacetyl-1,4-dihydrolutidine). The absorbance of
this compound is measured at 412 nm. The amount of formaldehyde corresponding to the absorbance value
for the test specimen is obtained from a calibration curve prepared under identical conditions.
© ISO 2008 – All rights reserved 1
---------------------- Page: 11 ----------------------
SIST EN ISO 17226-2:2009
ISO 17226-2:2008(E)
IULTCS/IUC 19-2:2008(E)
5 Reagents
Use only reagents of recognized analytical grade, unless otherwise stated. The water shall be grade 3 in
accordance with ISO 3696:1987. All solutions are aqueous solutions.
5.1 Reagents for the formaldehyde stock solution
5.1.1 Formaldehyde solution, approximately 37 % mass fraction.
5.1.2 Iodine solution, 0,05 mol/l, i.e. 12,68 g iodine per litre.
5.1.3 Sodium hydroxide solution, 2,0 mol/l.
5.1.4 Sulfuric acid solution, 2,0 mol/l.
5.1.5 Sodium thiosulfate solution, 0,1 mol/l.
5.1.6 Starch solution, 1 %, i.e. 1 g in 100 ml water.
5.2 Reagents for the colorimetric method
5.2.1 Sodium dodecylsulfonate (detergent) solution, 0,1 %, 1 g in 1 000 ml water.
5.2.2 Solution 1, 150 g ammonium acetate + 3 ml glacial acetic acid + 2 ml acetylacetone
(pentane-2,4-dione, CAS 123-54-6) in 1 000 ml water.
Prepare fresh daily and keep in a dark place. (It is sen
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.