SIST EN ISO 4048:2008
(Main)Leather - Chemical tests - Determination of matter soluble in dichloromethane and free fatty acid content (ISO 4048:2008)
Leather - Chemical tests - Determination of matter soluble in dichloromethane and free fatty acid content (ISO 4048:2008)
This International Standard specifies a method for the determination of the substances in leather which are soluble in dichloromethane. This method is applicable to all types of leather. Not all fatty and similar substances can be extracted from leather with organic solvents; they may be in part soluble and partly bound to the leather. On the other hand, the solvent can dissolve non-fatty substances, e.g. sulfur and impregnants, both of which cause difficulty in the determination of the acid value and saponification value of the fat. This International Standard includes two techniques for extraction of the fatty substances: 1) extraction using the Soxhlet apparatus; and 2) extraction using a pressurized extraction system. As the extraction is frequently done in conjunction with determination of the free fatty acid content of the leather, a suitable procedure for determination of the free fatty acids extracted by this method is included. The apparatus and technique described in this method are also suitable for the extraction by solvents other than dichloromethane (although the temperature conditions may need to be varied for high pressure extraction).
Leder - Chemische Prüfungen - Bestimmung der in Dichlormethan löslichen Substanzen und des freien Fettsäuregehalts (ISO 4048:2008)
Diese Internationale Norm legt ein Verfahren zur Bestimmung der in Dichlormethan löslichen Stoffe in Leder fest. Dieses Verfahren ist auf alle Lederarten anwendbar.
Nicht alle Fette und ähnlichen Stoffe können mit organischen Lösungsmitteln aus Leder extrahiert werden; sie können zum Teil löslich und zum Teil an das Leder gebunden sein. Andererseits können durch das Lösungsmittel Nichtfettstoffe, z. B. Schwefel und Imprägnierungsmittel, herausgelöst werden, die beide Schwierigkeiten bei der Bestimmung der Säurezahl und der Verseifungszahl der Fette verursachen.
Diese Internationale Norm enthält zwei Verfahren zur Extraktion von Fettstoffen: 1) Extraktion mit Soxhlet-Gerät und 2) Extraktion mit Hochdrucksystem.
Da die Extraktion häufig zusammen mit der Bestimmung des Gehalts an freien Fettsäuren des Leders erfolgt, ist eine geeignete Durchführung zur Bestimmung der mit diesem Verfahren extrahierten freien Fettsäuren enthalten.
Das in diesem Verfahren beschriebene Gerät und die Durchführung sind auch für die Extraktion mit anderen Lösungsmitteln als Dichlormethan geeignet (obwohl es erforderlich sein kann, die Temperaturbedingungen bei der Hochdruckextraktion zu verändern).
Cuir - Essais chimiques - Dosage des matières solubles dans le dichlorométhane et des acides gras libres (ISO 4048:2008)
L'ISO 4048:2008 spécifie une méthode de dosage des substances contenues dans le cuir et solubles dans le dichlorométhane. Cette méthode est applicable à tous les types de cuir.
L'ISO 4048:2008 inclut deux techniques d'extraction des matières grasses: 1) extraction à l'aide d'un appareil de Soxhlet; et 2) extraction à l'aide d'un système d'extraction sous pression. L'extraction étant fréquemment effectuée parallèlement à la détermination de la teneur en acides gras libres du cuir, l'ISO 4048:2008 inclut également un mode opératoire de détermination des acides gras libres extraits selon cette méthode.
L'appareillage et le mode opératoire spécifiés dans la présente méthode sont également utilisables pour des extractions effectuées avec d'autres solvants que le dichlorométhane (même s'il peut être nécessaire de faire varier les conditions de température pour l'extraction à haute pression).
Usnje - Kemični preskusi - Določevanje topne snovi v diklormetanu in vsebnosti prostih maščobnih kislin (ISO 4048:2008)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 4048:2008
01-maj-2008
1DGRPHãþD
SIST EN ISO 4048:2000
8VQMH.HPLþQLSUHVNXVL'RORþHYDQMHWRSQHVQRYLYGLNORUPHWDQXLQYVHEQRVWL
SURVWLKPDãþREQLKNLVOLQ ,62
Leather - Chemical tests - Determination of matter soluble in dichloromethane and free
fatty acid content (ISO 4048:2008)
Leder - Chemische Prüfungen - Bestimmung der in Dichlormethan löslichen Substanzen
und des freien Fettsäuregehalts (ISO 4048:2008)
Cuir - Essais chimiques - Dosage des matières solubles dans le dichlorométhane et des
acides gras libres (ISO 4048:2008)
Ta slovenski standard je istoveten z: EN ISO 4048:2008
ICS:
59.140.30
SIST EN ISO 4048:2008 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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EUROPEAN STANDARD
EN ISO 4048
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2008
ICS 59.140.30 Supersedes EN ISO 4048:1998
English Version
Leather - Chemical tests - Determination of matter soluble in
dichloromethane and free fatty acid content (ISO 4048:2008)
Cuir - Essais chimiques - Dosage des matières solubles Leder - Chemische Prüfungen - Bestimmung der in
dans le dichlorométhane et des acides gras libres (ISO Dichlormethan löslichen Substanzen und des freien
4048:2008) Fettsäuregehalts (ISO 4048:2008)
This European Standard was approved by CEN on 3 February 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 4048:2008: E
worldwide for CEN national Members.
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EN ISO 4048:2008 (E)
Contents Page
Foreword.3
2
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EN ISO 4048:2008 (E)
Foreword
This document (EN ISO 4048:2008) 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 August 2008, and conflicting national standards shall be withdrawn at
the latest by August 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.
This document supersedes EN ISO 4048:1998.
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
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INTERNATIONAL ISO
STANDARD 4048
IULTCS/IUC
4
Second edition
2008-02-15
Leather — Chemical tests —
Determination of matter soluble in
dichloromethane and free fatty acid
content
Cuir — Essais chimiques — Dosage des matières solubles dans le
dichlorométhane et des acides gras libres
Reference number
ISO 4048:2008(E)
IULTCS/IUC 4:2008(E)
©
ISO 2008
---------------------- Page: 5 ----------------------
ISO 4048:2008(E)
IULTCS/IUC 4:2008(E)
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ii © ISO 2008 – All rights reserved
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ISO 4048:2008(E)
IULTCS/IUC 4:2008(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 4048/IUC 4 was prepared by the European Committee for Standardization (CEN) Technical Committee
CEN/TC 289, Leather, in collaboration with the Chemical Tests Commission of the International Union of
Leather Technologists and Chemists Societies (IUC Commission, IULTCS), in accordance with the
Agreement on technical co-operation between ISO and CEN (Vienna Agreement). It is based on IUC 4
originally published in J. Soc. Leather Trades Chemists, 49, p. 10, 1965, and declared an official method of
the IULTCS in 1965.
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 second edition cancels and replaces the first edition (ISO 4048:1977), which has been technically revised.
© ISO 2008 – All rights reserved iii
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ISO 4048:2008(E)
INTERNATIONAL STANDARD
IULTCS/IUC 4:2008(E)
Leather — Chemical tests — Determination of matter soluble in
dichloromethane and free fatty acid content
1 Scope
This International Standard specifies a method for the determination of the substances in leather which are
soluble in dichloromethane. This method is applicable to all types of leather.
Not all fatty and similar substances can be extracted from leather with organic solvents; they may be in part
soluble and partly bound to the leather. On the other hand, the solvent can dissolve non-fatty substances, e.g.
sulfur and impregnants, both of which cause difficulty in the determination of the acid value and saponification
value of the fat.
This International Standard includes two techniques for extraction of the fatty substances: 1) extraction using
the Soxhlet apparatus; and 2) extraction using a pressurized extraction system.
As the extraction is frequently done in conjunction with determination of the free fatty acid content of the
leather, a suitable procedure for determination of the free fatty acids extracted by this method is included.
The apparatus and technique described in this method are also suitable for the extraction by solvents other
than dichloromethane (although the temperature conditions may need to be varied for high pressure
extraction).
2 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 4044, Leather — Chemical tests — Preparation of chemical test samples
ISO 4098, Leather — Chemical test
...
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