EN ISO 4048:1998

Leather - Determination of matter soluble in dichloromethane (ISO 4048:1977)

Migrated from Progress Sheet (TC Comment) (2000-07-10): WIs 032, 033 and 034 are the result of the splitting of WI 004 (DDD 4:1997)

Leder - Bestimmung der in Dichlormethan löslichen Substanzen (ISO 4048:1977)

Diese Internationale Norm legt ein Verfahren zur Bestimmung der in Dichloromethan löslichen Stoffe in Leder fest.

Cuir - Dosage des matières solubles dans le dichlorométhane (ISO 4048:1977)

Usnje - Določevanje topnega v diklormetanu (ISO 4048:1977)

General Information

• Status: Withdrawn
• Publication Date: 21-Jul-1998
• Withdrawal Date: 14-Feb-2008
• ICS: 59.140.30 - Leather and furs
• Technical Committee: CEN/TC 289 - Leather
• Drafting Committee: CEN/TC 289 - Leather
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 15-Feb-2008
• Completion Date: 15-Feb-2008
• Ref Project: SIST EN ISO 4048:2000 - Leather - Determination of matter soluble in dichloromethane (ISO 4048:1977)

Relations

• Replaced By: EN ISO 4048:2008 - Leather - Chemical tests - Determination of matter soluble in dichloromethane and free fatty acid content (ISO 4048:2008)
• Effective Date: 22-Dec-2008

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 4048:2000
01-februar-2000
8VQMH'RORþHYDQMHWRSQHJDYGLNORUPHWDQX,62
Leather - Determination of matter soluble in dichloromethane (ISO 4048:1977)
Leder - Bestimmung der in Dichlormethan löslichen Substanzen (ISO 4048:1977)
Cuir - Dosage des matieres solubles dans le dichlorométhane (ISO 4048:1977)
Ta slovenski standard je istoveten z: EN ISO 4048:1998
ICS:
59.140.30
SIST EN ISO 4048:2000 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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INTERNATIONAL STANDARD.
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION l MEXAYHAPOAHAR OPl-AHM3AUMR I-Io CTAHAAPTM3AWH-ORGANISATION INTERNATIONALE DE NORMALISATION
Determination of matter soluble in dichloromethane
Leather -
Cuir - Dosage des matikes solubles dans Ie dichloromethane
First edition - 1977-11-01
-
Lu
UDC 675 : 543.832 Ref. No. ISO 4048-1977 (El
Descriptots : leather, Chemical analysis, quantitative analysis, determination of content, dissolved matter, extraction analysis, dichloro-
methane.
Price based on 2 pages

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FOREWORD
ISO (the International Organization for Standardization) is a worldwide federation
of national Standards institutes (!SO member bodies). The work of developing
International Standards is carried out through ISO technical committees. Every
member body interested in a subject for which a technical committee has been set
up 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.
Draft International Standards adopted by the technical committees are circulated
to the member bodies for approval before their acceptance as International
Standards by the ISO Council.
International Standard ISO 4048 was developed by Technical Committee
ISO/TC 120, Leather, and was circulated to the member bodies in August 1976.
lt has been approved by the member bodies of the following countries :
Australia Hungary Poland
Brazil I ndia Romania
Chile Israel South Africa, Rep. of
Czechoslovakia Mexico Turkey
France Netherlands United Kingdom
Germany New Zealand
The member body of the following country expressed disapproval of the document
on technical grounds :
U.S.S. R.
This International Standard is based on method lUC/4 of the International Union
of Leather Technologists’ and Chemists’ Societies.
0 International Organkation for Standardkation, 1977 l
Printed in Switzerland

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ISO 4048-1977 (E)
INTERNATIONAL STANDARD
Leather - Determination of matter soluble in dichloromethane
5 REAGENTS
0 INTRODUCTION
During the analysis, use only reagents of recognized ana-
Not all fatty and similar substances tan be extracted from
lytical grade.
leather with organic solvents; they may be partly soluble
and partly bound to the leather. On the other hand, the
solvent may dissolve non-fatty substances, for example
5.1 Dichloromethane, boiling Point 38 to 40 ‘C, freshly
sulphur and impregnants, both of which Cause difficulty in distilled and kept in a dark flask over Calcium Oxide.
the determination of the acid and saponification values of
WARNING - Dichloromethane has toxic properties and
the fats.
should be used with caution.
NOTE - The apparatus and procedure specified in this method are
NOTES
also suitable for the extraction of leather by solvents other than
dichloromethane. lf, for any purpose, other solvent-s are used, the
1 Dichloromethane that has stood for a long time should be tested
solvent or solvents used should be stated in the test report.
for the presence of any hydrochloric acid which may have formed,
as follows :
Shake 10 ml of dichloromethane with 1 ml of 0,l N silver nitrate
1 SCOPE AND FIELD OF APPLICATION
solution. If the silver nitrate solution becomes turbid, the dichloro-
methane should be redistilled and kept in a dark flask over Calcium
This International Standard specifies a method for the
Oxide.
determination of the substances in leather which are soluble
2 Dichloromethane which has been used for this analysis tan be
in dichloromethane.
recovered and reused after distillation.
This method is applicable to all types of leather.
6 APPARATUS
2 REFERENCES
Ordinary laboratory apparatus and in particular
ISO 2418, Leather - Laboratory samples - Location and
iden tifica tion.
6.1 Soxhlet extraction apparatus
...