SIST EN ISO 17075:2008

SLOVENSKI STANDARD
SIST EN ISO 17075:2008
01-februar-2008
1DGRPHãþD
SIST-TS CEN/TS 14495:2004
8VQMH.HPLþQLSUHVNXVL'RORþHYDQMHNURPD9,,62
Leather - Chemical tests - Determination of chromium(VI) content (ISO 17075:2007)
Leder - Chemische Prüfungen - Bestimmung des Chrom(VI)-Gehalts (ISO 17075:2007)
Cuir - Essais chimiques - Détermination de la teneur en chrome(VI) (ISO 17075:2007)
Ta slovenski standard je istoveten z: EN ISO 17075:2007
ICS:
59.140.30 Usnje in krzno Leather and furs
SIST EN ISO 17075:2008 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 17075
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2007
ICS 59.140.30 Supersedes CEN/TS 14495:2003
English Version
Leather - Chemical tests - Determination of chromium(VI)
content (ISO 17075:2007)
Cuir - Essais chimiques - Détermination de la teneur en Leder - Chemische Prüfungen - Bestimmung des
chrome(VI) (ISO 17075:2007) Chrom(VI)-Gehalts (ISO 17075:2007)
This European Standard was approved by CEN on 24 October 2007.
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
© 2007 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 17075:2007: E
worldwide for CEN national Members.

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EN ISO 17075:2007 (E)
Contents Page
Foreword.3
2

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EN ISO 17075:2007 (E)
Foreword
This document (EN ISO 17075:2007) has been prepared by Technical Committee CEN/TC 289 "Leather", the
secretariat of which is held by UNI, in collaboration with the International Union of Leather Technologists and
Chemists Societies (IULTCS).
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 May 2008, and conflicting national standards shall be withdrawn at the
latest by May 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 CEN/TS 14495:2003.
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 17075
IULTCS/IUC
18
First edition
2007-11-15

Leather — Chemical tests —
Determination of chromium(VI) content
Cuir — Essais chimiques — Détermination de la teneur en chrome(VI)




Reference number
ISO 17075:2007(E)
IULTCS/IUC 18:2007(E)
©
ISO 2007

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ISO 17075:2007(E)
IULTCS/IUC 18:2007(E)
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ii © ISO 2007 – All rights reserved

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ISO 17075:2007(E)
IULTCS/IUC 18:2007(E)
Contents Page
Foreword. iv
1 Scope.1
2 Normative references.1
3 Terms and definitions .1
4 Principle.1
5 Reagents.2
6 Apparatus.2
7 Procedure.3
7.1 Sampling and preparation of samples.3
7.2 Preparation of analytical solution.3
7.3 Determination of chromium(VI) in the solution obtained from the extraction procedure.3
7.4 Blank solution.4
7.5 Calibration.4
7.6 Determination of the recovery rate .4
7.6.1 Influence of the matrix .4
7.6.2 Influence of the RP material .5
8 Calculation and expression of results.5
8.1 Calculation of chromium(VI) content.5
8.2 Recovery rate (according to 7.6.1).6
8.3 Expression of results .6
9 Test report.6
Annex A (informative) Reversed phase material.7
Annex B (informative) Accuracy.8

© ISO 2007 – All rights reserved iii

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ISO 17075:2007(E)
IULTCS/IUC 18:2007(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 17075:2007 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 Standardisation (CEN) Technical Committee CEN/TC 289, Leather, the secretariat of which is
held by UNI, in accordance with the Agreement on technical co-operation between ISO and CEN (Vienna
Agreement).
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 first edition of ISO 17075 cancels and replaces the first edition of CEN TS 14495:2003, which has been
technically revised.

iv © ISO 2007 – All rights reserved

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ISO 17075:2007(E)
INTERNATIONAL STANDARD
IULTCS/IUC 18:2007(E)

Leather — Chemical tests — Determination of chromium(VI)
content
1 Scope
This International Standard specifies a method for determining chromium(VI) in solutions leached from leather
under defined conditions. The method described is suitable to quantify the chromium(VI) content in leathers
down to 3 mg/kg.
This document is applicable to all leather types.
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 3696, 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
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
chromium(VI) content
amount of chromium(VI) in leather determined by this method after extraction with an aqueous salt solution at
pH 7,5 to 8,0
NOTE The chromium(VI) content is reported as chromium(VI) in milligrams per kilogram (mg/kg), expressed as the
dry mass of the sample.
4 Principle
Soluble chromium(VI) is leached from the sample in phosphate buffer at pH 7,5 to 8,0 and substances which
influence the detection are removed by solid phase extraction if necessary. The chromium(VI) in solution
oxidizes 1,5-diphenylcarbazide to 1,5-diphenylcarbazone to give a red/violet complex with chromium which
can be quantified photometrically at 540 nm.
The results obtained from the described method are strictly dependent on the extraction conditions. Results
obtained by using other extraction procedures (extraction solution, pH, extraction time, etc.) are not
comparable with the results produced by the procedure described in this standard.
© ISO 2007 – All rights reserved 1

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ISO 17075:2007(E)
IULTCS/IUC 18:2007(E)
5 Reagents
All reagents used shall have at least analytical grade purity.
5.1 Extraction solution.
Dissolve 22,8 g dipotassiumhydrogenphosphate K HPO⋅3H O in 1 000 ml water, adjusted to pH 8,0 ± 0,1
2 4 2
with phosphoric acid (5.3). Degas this solution with either argon or nitrogen.
5.2 Diphenylcarbazide solution.
Dissolve 1,0 g 1,5-diphenylcarbazide CO(NHNHC H ) in 100 ml acetone (CH ) CO and acidified with one
6 5 2 3 2
drop of glacial acetic acid CH COOH.
3
The solution should be kept in a brown glass bottle. The shelf life is up to 14 days at 4 °C.
5.3 Phosphoric acid solution.
...