EN ISO 14088:2012
(Main)Leather - Chemical tests - Quantitative analysis of tanning agents by filter method (ISO 14088:2012)
Leather - Chemical tests - Quantitative analysis of tanning agents by filter method (ISO 14088:2012)
ISO 14088:2012 specifies a test method for the determination of tanning agents through filteration of all vegetable and synthetic tanning products.
Leder - Chemische Prüfungen - Quantitative Analyse von Gerbstoffen durch Filterverfahren (ISO 14088:2012)
Diese Internationale Norm beschreibt ein Prüfverfahren zur Bestimmung von Gerbstoffen durch Filterverfahren in sämtlichen pflanzlichen und synthetischen Gerbmitteln.
Cuir - Essais chimiques - Analyse quantitative des agents de tannage par la méthode au filtre cloche (ISO 14088:2012)
L'ISO 14088:2012 spécifie une méthode d'essai permettant de déterminer les agents de tannage par filtration de tous les produits de tannage végétaux et synthétiques.
Usnje - Kemični preskusi - Kvantitativna analiza sredstev za strojenje s filtrsko metodo (ISO 14088:2012)
Ta dokument opisuje metodo za določanje sredstev za strojenje v vseh rastlinskih in sintetičnih izdelkih za strojenje.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-2012
8VQMH.HPLþQLSUHVNXVL.YDQWLWDWLYQDDQDOL]DVUHGVWHY]DVWURMHQMHVILOWUVNR
PHWRGR ,62
Leather - Chemical tests - Quantitative analysis of tanning agents by filter method (ISO
14088:2012)
Leder - Chemische Prüfung - Quantitative Analyse von Gerbstoffen durch Filterverfahren
(ISO 14088:2012)
Cuir - Essais chimiques - Analyse quantitative des agents tannants par la méthode au
filtre-cloche (ISO 14088:2012)
Ta slovenski standard je istoveten z: EN ISO 14088:2012
ICS:
59.140.30 Usnje in krzno Leather and furs
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN ISO 14088
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2012
ICS 59.140.30
English Version
Leather - Chemical tests - Quantitative analysis of tanning
agents by filter method (ISO 14088:2012)
Cuir - Essais chimiques - Analyse quantitative des agents Leder - Chemische Prüfung - Quantitative Analyse von
de tannage par la méthode au filtre cloche (ISO Gerbstoffen durch Filterverfahren (ISO 14088:2012)
14088:2012)
This European Standard was approved by CEN on 31 January 2012.
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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2012 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 14088:2012: E
worldwide for CEN national Members.
Contents Page
Foreword .3
Foreword
This document (EN ISO 14088:2012) has been prepared by Technical Committee CEN/TC 289 “Leather”, the
secretariat of which is held by UNI, in collaboration with Technical Committee 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 2012, and conflicting national standards shall be withdrawn at
the latest by August 2012.
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, Croatia, 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, Turkey and the United Kingdom.
INTERNATIONAL ISO
STANDARD 14088
IULTCS/IUC
First edition
2012-02-01
Leather — Chemical tests — Quantitative
analysis of tanning agents by filter
method
Cuir — Essais chimiques — Analyse quantitative des agents de
tannage par la méthode au filtre cloche
Reference number
ISO 14088:2012(E)
IULTCS/IUC 32:2012(E)
©
ISO 2012
ISO 14088:2012(E)
IULTCS/IUC 32:2012(E)
© ISO 2012
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 2012 – All rights reserved
ISO 14088:2012(E)
IULTCS/IUC 32:2012(E)
Contents Page
Foreword . iv
1 Scope . 1
2 Normative references . 1
3 Principle . 1
4 Reagents . 1
5 Apparatus . 1
6 Sampling and sample preparation . 3
7 Instrumental analysis . 4
7.1 Preparation of the analytical solution . 4
7.1.1 Vegetable tanning agents in powder/solid form . 4
7.1.2 Vegetable tanning agents in liquid form . 4
7.1.3 Synthetic tanning agents in powder form . 4
7.1.4 Synthetic tanning agents in liquid form . 4
7.1.5 Vegetable tanning agents organic solvent extracted in powder form . 4
7.2 Preparation of the bell . 5
7.3 De-tanning the analytical solution (determination of the non-tanning agents) . 5
7.4 Determination of soluble substances . 5
7.5 Determination of total solids . 6
8 Calculation and expression of the results . 6
9 Test report . 7
Annex A (informative) Approximate quantity of vegetable tannic extract agent in powder/solid
form to be weighed . 8
Annex B (normative) Determination of hide powder blank value . 9
Annex C (informative) Suppliers of hide powder . 10
ISO 14088:2012(E)
IULTCS/IUC 32:2012(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 14088 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).
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.
iv © ISO 2012 – All rights reserved
ISO 14088:2012(E)
INTERNATIONAL STANDARD
IULTCS/IUC 32:2012(E)
Leather — Chemical tests — Quantitative analysis of tanning
agents by filter method
1 Scope
This International Standard specifies a test method for the determination of tanning agents through filtration of
all vegetable and synthetic tanning products.
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 3696, Water for analytical laboratory use — Specification and test methods
3 Principle
Indirect gravimetric analysis of vegetable and synthetic tanning agents through fixing of the absorbent
compounds on low-chromed hide powder.
4 Reagents
4.1 Distilled water, freshly prepared according to ISO 3696 (Water for analytical laboratory use, Grade 3).
The pH value of the water shall be between 5 and 6. When using methyl red, the water should not turn red.
The evaporation residue of 100 ml should be less than 1 mg.
1)
4.2 Hide powder , containing not more than 0,5 % chromium oxide and with a humidity not more than
13 %.
The blank value of the hide powder shall be calculated according to Annex B.
4.3 Gelatine solution, of 1 g gelatine and 10 g sodium chloride, filled up to 100 ml with distilled water,
adjusted to pH 4,7.
5 Apparatus
The glass equipment shall be resistant to the action of distilled water. The flasks and tubes shall be Class A.
Use normal laboratory equipment and, in particular, the following.
5.1 Desiccator, with an airtight cover and containing silica orange gel.
1) See Annex C.
ISO 14088:2012(E)
IULTCS/IUC 32:2012(E)
5.2 Evaporation dishes, suitable for slowly evaporating water.
These shall be short with flat bases and measure 7 cm to 8,5 cm in diameter.
Use silver dishes. If this is not possible, preferably use dishes made of stainless steel or, if necessary, ceramic
or glass.
5.3 Water bath.
5.4 Drying oven, whose temperature shall be kept at the operating range of (102 2) °C.
5.5 Analytical balance, with a precision of 0,2 mg at a load of 200 g.
5.6 Technical balance, with a precision of 0,1 g at a load of 1 000 g.
5.7 Procter bell (see Figure 1), composed of a cylindrical glass bell (length of the cylindrical part:
90 mm 1 mm; internal diameter of the cylindrical part: 28 mm 1 mm). A perforated rubber cork is inserted
into the narrow part of the bell. A capillary glass tube (internal diameter 1,5 mm) with two right-angled bends is
inserted into the hole in the cork as shown in Figure 1. The end of the shortest part can fit right down to the
base of the cork.
Dimensions in millimetres
Figure 1 — Procter bell
2 © ISO 2012 – All rights reserved
ISO 14088:2012(E)
IULTCS/IUC 32:2012(E)
5.8 Polyethylene tube, the tube shall be the right size to fit onto the bell’s capillary glass tube.
5.9 Hoffman clamp.
5.10 1 000 ml volumetric flasks.
5.11 50 ml pipette.
5.12 Vacuum filter system (e.g. Figure 2).
Figure 2 — Vacuum filter system
5.13 Cel
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.