SIST EN ISO 17072-2:2022

Leather - Chemical determination of metal content - Part 2: Total metal content (ISO 17072-2:2022)

This document specifies a method for the determination of the total metal content in leather using
digestion of the leather and subsequent determination with inductively coupled plasma optical emission
spectrometry (ICP-OES), inductively coupled plasma mass spectrometry (ICP-MS), atomic absorption
spectrometry (AAS) or spectrometry of atomic fluorescence (SFA).
This method determines the total metal content in leather. It is not compound-specific or specific to the
oxidation state of the metals.
The method is applicable for determining the following metals:
Aluminium (Al) Copper (Cu) Potassium (K)
Antimony (Sb) Iron (Fe) Selenium (Se)
Arsenic (As) Lead (Pb) Silicon (Si)
Barium (Ba) Magnesium (Mg) Sodium (Na)
Cadmium (Cd) Manganese (Mn) Tin (Sn)
Calcium (Ca) Mercury (Hg) Titanium (Ti)
Chromium (Cr) (except chromium-tanned leathers) Molybdenum (Mo) Zinc (Zn)
Cobalt (Co) Nickel (Ni) Zirconium (Zr)
This method is also suitable for determining Boron (B) in leather.
In the case of chromium-tanned leathers, it is often more relevant to use ISO 5398-1, ISO 5398-2,
ISO 5398-3 or ISO 5398-4.
Interlaboratory test results and the quantification limits possible with ICP-OES are given in Tables A.1
and A.2.
For the determination of Al and Ti in leather, a digestion procedure is given in Annex B.

Leder - Chemische Bestimmung des Metallgehaltes - Teil 2: Gesamtmetallgehalt (ISO 17072-2:2022)

Dieses Dokument legt ein Verfahren zur Bestimmung des Gesamtgehaltes von Metallen in Leder fest, indem ein Aufschluss des Leders und danach eine Bestimmung der Metalle mittels optischer Emissions-spektrometrie mit induktiv gekoppeltem Plasma (ICP-OES, en: inductively coupled plasma optical emission spectrometry), Massenspektrometrie mit induktiv gekoppeltem Plasma (ICP-MS, en: inductively coupled plasma mass spectrometry), Atomabsorptionsspektrometrie (AAS, en: atomic absorption spectrometry) oder Atomfluoreszenzspektrometrie (SFA, en: spectrometry of atomic fluorescence) durchgeführt werden.
Dieses Verfahren bestimmt den gesamten Metallgehalt in Leder. Es ist nicht spezifisch für die jeweilige chemische Verbindung oder spezifisch für den Oxidationszustand der Metalle.
Das Verfahren ist zur Bestimmung der folgenden Metalle anwendbar:
[tabelle]
Dieses Verfahren ist außerdem zur Bestimmung von Bor (B) in Leder geeignet.
Bei chromgegerbtem Leder ist es häufig sinnvoller, ISO 5398-1, ISO 5398-2, ISO 5398-3 oder ISO 5398-4 anzuwenden.
Ringversuchsergebnisse und die mit ICP-OES erreichbaren Bestimmungsgrenzen sind in Tabelle A.1 und Tabelle A.2 angegeben.
Für die Bestimmung von Al und Ti in Leder ist in Anhang B ein Aufschlussverfahren angegeben.

Cuir - Dosage chimique des métaux - Partie 2: Teneur totale en métaux (ISO 17072-2:2022)

Le présent document spécifie une méthode de détermination de la teneur totale en métaux présents dans le cuir par digestion du cuir suivie d'une détermination par spectrométrie d'émission optique avec plasma à couplage inductif (ICP-OES), par spectrométrie de masse avec plasma à couplage inductif (ICP‑MS), par spectrométrie d'absorption atomique (AAS) ou par spectrométrie de fluorescence atomique (AFS).
Cette méthode détermine la teneur totale en métaux présents dans le cuir. Elle n'est pas spécifique à un composé ni à l'état d'oxydation des métaux.

Usnje - Kemijsko določevanje kovin - 2. del: Celotni delež kovin (ISO 17072-2:2022)

Ta dokument določa metodo za določevanje celotnega deleža kovin v usnju z uporabo razgradnje usnja in naknadnega določevanja z optično emisijsko spektrometrijo z induktivno sklopljeno plazmo (ICP-OES), masno spektrometrijo z induktivno sklopljeno plazmo (ICP-MS), atomsko absorpcijsko spektrometrijo (AAS) ali atomsko fluorescenčno spektrometrijo (SFA). Ta metoda določa skupno vsebnost kovin v usnju. Metoda ne obravnava določene spojine ali določenega oksidacijskega stanja kovin. Metoda se uporablja za določevanje naslednjih kovin: aluminij (Al), baker (Cu), kalij (K), antimon (Sb), železo (Fe), selen (Se), arzen (As), svinec (Pb), silicij (Si), barij (Ba), magnezij (Mg), natrij (Na), kadmij (Cd), mangan (Mn), kositer (Sn), kalcij (Ca), živo srebro (Hg), titan (Ti), krom (Cr) (razen usnja, ustrojenega s kromom), molibden (Mo), cink (Zn), kobalt (Co), nikelj (Ni), cirkonij (Zr). Ta metoda je primerna tudi za določanje bora (B) v usnju. Za usnja, ustrojena s kromom, je pogosto ustreznejše uporabiti standarde ISO 5398-1, ISO 5398-2, ISO 5398-3 ali ISO 5398-4. Rezultati medlaboratorijskih preskusov in omejitve kvantifikacije, ki so mogoče pri optični emisijski spektrometriji z induktivno sklopljeno plazmo, so podani v preglednicah A.1 in A.2. Za določanje aluminija in titana v usnju je v dodatku B podan postopek razgradnje.

General Information

• Status: Published
• Public Enquiry End Date: 30-Nov-2021
• Publication Date: 19-Sep-2022
• ICS: 59.140.30 - Leather and furs
• Technical Committee: IUSN - Leather
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 16-Sep-2022
• Due Date: 21-Nov-2022
• Completion Date: 20-Sep-2022
• Ref Project: EN ISO 17072-2:2022 - Leather - Chemical determination of metal content - Part 2: Total metal content (ISO 17072-2:2022)

Relations

• Revised: SIST EN ISO 17072-2:2019 - Leather - Chemical determination of metal content - Part 2: Total metal content (ISO 17072-2:2019)
• Effective Date: 21-Jul-2021
• Replaces: SIST EN ISO 17072-2:2019 - Leather - Chemical determination of metal content - Part 2: Total metal content (ISO 17072-2:2019)
• Effective Date: 14-Sep-2022

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 17072-2:2022
01-november-2022
Nadomešča:
SIST EN ISO 17072-2:2019
Usnje - Kemijsko določevanje kovin - 2. del: Celotni delež kovin (ISO 17072-2:2022)
Leather - Chemical determination of metal content - Part 2: Total metal content (ISO
17072-2:2022)
Leder - Chemische Bestimmung des Metallgehaltes - Teil 2: Gesamtmetallgehalt (ISO
17072-2:2022)
Cuir - Dosage chimique des métaux - Partie 2: Teneur totale en métaux (ISO 17072-
2:2022)
Ta slovenski standard je istoveten z: EN ISO 17072-2:2022
ICS:
59.140.30 Usnje in krzno Leather and furs
SIST EN ISO 17072-2:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN ISO 17072-2:2022

---------------------- Page: 2 ----------------------
SIST EN ISO 17072-2:2022


EN ISO 17072-2
EUROPEAN STANDARD

NORME EUROPÉENNE

September 2022
EUROPÄISCHE NORM
ICS 59.140.30 Supersedes EN ISO 17072-2:2019
English Version

Leather - Chemical determination of metal content - Part 2:
Total metal content (ISO 17072-2:2022)
Cuir - Dosage chimique des métaux - Partie 2: Teneur Leder - Chemische Bestimmung des Metallgehaltes -
totale en métaux (ISO 17072-2:2022) Teil 2: Gesamtmetallgehalt (ISO 17072-2:2022)
This European Standard was approved by CEN on 1 August 2022.

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, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.





EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 17072-2:2022 E
worldwide for CEN national Members.

---------------------- Page: 3 ----------------------
SIST EN ISO 17072-2:2022
EN ISO 17072-2:2022 (E)
Contents Page
European foreword . 3

2

---------------------- Page: 4 ----------------------
SIST EN ISO 17072-2:2022
EN ISO 17072-2:2022 (E)
European foreword
This document (EN ISO 17072-2:2022) has been prepared by Technical Committee ISO/IULTCS
"International Union of Leather Technologists and Chemists Societies" in collaboration with Technical
Committee CEN/TC 289 “Leather” the secretariat of which is held by UNI.
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 March 2023, and conflicting national standards shall
be withdrawn at the latest by March 2023.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 17072-2:2019.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
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, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 17072-2:2022 has been approved by CEN as EN ISO 17072-2:2022 without any
modification.

3

---------------------- Page: 5 ----------------------
SIST EN ISO 17072-2:2022

---------------------- Page: 6 ----------------------
SIST EN ISO 17072-2:2022
INTERNATIONAL ISO
STANDARD 17072-2
IULTCS
IUC 27-2
Third edition
2022-07
Leather — Chemical determination of
metal content —
Part 2:
Total metal content
Cuir — Dosage chimique des métaux —
Partie 2: Teneur totale en métaux
Reference numbers
ISO 17072-2:2022(E)
IULTCS/IUC 27-2:2022(E)
© ISO 2022

---------------------- Page: 7 ----------------------
SIST EN ISO 17072-2:2022
ISO 17072-2:2022(E)
IULTCS/IUC 27-2:2022(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2022
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
  © ISO 2022 – All rights reserved

---------------------- Page: 8 ----------------------
SIST EN ISO 17072-2:2022
ISO 17072-2:2022(E)
IULTCS/IUC 27-2:2022(E)
Contents Page
Foreword .iv
1 S c op e . 1
2 Nor m at i ve r ef er enc e s . 1
3 Terms and definitions . 2
4 P r i nc iple . 2
5 R e a g ent s . 2
6 Apparatus and materials .3
7 Sampling and sample preparation . 3
8 P r o c e du re .4
8 .1 Ac id d i g e s t ion . 4
8 . 2 M ic r ow ave d i g e s t ion . 4
8.3 A nalysis by ICP, AAS and SFA. 4
8.3.1 G eneral . 4
8 . 3 . 2 IC P . . 5
8 .3 .3 A A S . 5
8.3.4 Analysis by SFA technique . 5
9 C alculation and expression of results . 5
10 Te s t r ep or t . 6
Annex A (informative) Interlaboratory test results and quantification limits .7
Annex B (normative) Acidic digestion for the determination of total aluminium and
titanium content in leather. 9
Bibliography .11
iii
© ISO 2022 – All rights reserved

---------------------- Page: 9 ----------------------
SIST EN ISO 17072-2:2022
ISO 17072-2:2022(E)
IULTCS/IUC 27-2:2022(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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO’s adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/
iso/foreword.html.
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 document 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).
This third edition cancels and replaces the second edition (ISO 17072-2:2019), which has been
technically revised. The main changes are as follows:
— Clause 1, Clause 6 and 8.1 have been editorially and technically modified;
— a new Annex B has been added describing the digestion procedure for the determination of
aluminium and titanium.
A list of all parts in the ISO 17072 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
  © ISO 2022 – All rights reserved

---------------------- Page: 10 ----------------------
SIST EN ISO 17072-2:2022
ISO 17072-2:2022(E)
INTERNATIONAL STANDARD
IULTCS/IUC 27-2:2022(E)
Leather — Chemical determination of metal content —
Part 2:
Total metal content
1 S cope
This document specifies a method for the determination of the total metal content in leather using
digestion of the leather and subsequent determination with inductively coupled plasma optical emission
spectrometry (ICP-OES), inductively coupled plasma mass spectrometry (ICP-MS), atomic absorption
spectrometry (AAS) or spectrometry of atomic fluorescence (SFA).
This method determines the total metal content in leather. It is not compound-specific or specific to the
oxidation state of the metals.
The method is applicable for determining the following metals:
Aluminium (Al) Copper (Cu) Potassium (K)
Antimony (Sb) Iron (Fe) Selenium (Se)
Arsenic (As) Lead (Pb) Silicon (Si)
Barium (Ba) Magnesium (Mg) Sodium (Na)
Cadmium (Cd) Manganese (Mn) Tin (Sn)
Calcium (Ca) Mercury (Hg) Titanium (Ti)
Chromium (Cr) (except chromium-tanned leathers) Molybdenum (Mo) Zinc (Zn)
Cobalt (Co) Nickel (Ni) Zirconium (Zr)
This method is also suitable for determining Boron (B) in leather.
In the case of chromium-tanned leathers, it is often more relevant to use ISO 5398-1, ISO 5398-2,
ISO 5398-3 or ISO 5398-4.
Interlaboratory test results and the quantification limits possible with ICP-OES are given in Tables A.1
and A.2.
For the determination of Al and Ti in leather, a digestion procedure is given in Annex B.
2 Normat ive references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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
1
© ISO 2022 – All rights reserved

---------------------- Page: 11 ----------------------
SIST EN ISO 17072-2:2022
ISO 17072-2:2022(E)
IULTCS/IUC 27-2:2022(E)
ISO 4684, Leather — Chemical tests — Determination of volatile matter
ISO 11885, Water quality — Determination of selected elements by inductively coupled plasma optical
emission spectrometry (ICP-OES)
ISO 15586, Water quality — Determination of trace elements using atomic absorption spectrometry with
graphite furnace
ISO 17294-2, Water quality — Application of inductively coupled plasma mass spectrometry (ICP-MS) —
Part 2: Determination of selected elements including uranium isotopes
ISO 17852, Water quality — Determination of mercury
...

SLOVENSKI STANDARD
oSIST prEN ISO 17072-2:2021
01-november-2021
Usnje - Kemijsko določevanje kovin - 2. del: Celotni delež kovin (ISO/DIS 17072-
2:2021)
Leather - Chemical determination of metal content - Part 2: Total metal content (ISO/DIS
17072-2:2021)
Leder - Chemische Bestimmung des Metallgehaltes - Teil 2: Gesamtmetallgehalt
(ISO/DIS 17072-2:2021)
Cuir - Détermination chimique de la teneur en métal - Partie 2: Teneur totale en métaux
(ISO/DIS 17072-2:2021)
Ta slovenski standard je istoveten z: prEN ISO 17072-2
ICS:
59.140.30 Usnje in krzno Leather and furs
oSIST prEN ISO 17072-2:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN ISO 17072-2:2021

---------------------- Page: 2 ----------------------
oSIST prEN ISO 17072-2:2021
DRAFT INTERNATIONAL STANDARD
ISO/DIS 17072-2
IULTCS
IUC 27-2
IULTCS Secretariat: ISO
Voting begins on: Voting terminates on:
2021-09-16 2021-12-09
Leather — Chemical determination of metal content —
Part 2:
Total metal content
Cuir — Détermination chimique de la teneur en métal —
Partie 2: Teneur totale en métaux
ICS: 59.140.30
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference numbers
NATIONAL REGULATIONS.
ISO/DIS 17072-2:2021(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
IUC 27-2:2021(E)
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
©
PROVIDE SUPPORTING DOCUMENTATION. ISO 2021

---------------------- Page: 3 ----------------------
oSIST prEN ISO 17072-2:2021
ISO/DIS 17072-2:2021(E)
IUC 27-2:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved

---------------------- Page: 4 ----------------------
oSIST prEN ISO 17072-2:2021
ISO/DIS 17072-2:2021(E)
IUC 27-2:2021(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Principle . 2
5 Reagents . 2
6 Apparatus and materials. 3
7 Sampling and sample preparation . 3
8 Procedure. 4
8.1 Acid digestion . 4
8.2 Microwave digestion . 4
8.3 Analysis by ICP, AAS and SFA . 4
8.3.1 General. 4
8.3.2 ICP. 4
8.3.3 AAS . 5
8.3.4 Analysis by SFA technique . 5
9 Calculation and expression of results . 5
10 Test report . 6
Annex A (informative) Interlaboratory test results and quantification limits .7
Annex B (normative) Acidic digestion for the determination of total aluminium and
titanium content in leather . 9
Bibliography .11
© ISO 2021 – All rights reserved iii

---------------------- Page: 5 ----------------------
oSIST prEN ISO 17072-2:2021
ISO/DIS 17072-2:2021(E)
IUC 27-2:2021(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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: www .iso .org/ iso/ foreword .html.
This document 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.
This third edition cancels and replaces the second edition (ISO 17072-2:2019), which has been
technically revised as follows:
— the Scope and Clauses 6 and 8.1 have been editorially and technically modified;
— a new normative Annex B has been added describing the digestion procedure for the determination
of aluminium and titanium;
A list of all parts in the ISO 17072 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2021 – All rights reserved

---------------------- Page: 6 ----------------------
oSIST prEN ISO 17072-2:2021
ISO/DIS 17072-2:2021(E)
DRAFT INTERNATIONAL STANDARD
IUC 27-2:2021(E)
Leather — Chemical determination of metal content —
Part 2:
Total metal content
1 Scope
This document specifies a method for the determination of the total metal content in leather using
digestion of the leather and subsequent determination with inductively coupled plasma optical emission
spectrometry (ICP-OES), inductively coupled plasma mass spectrometry (ICP-MS), atomic absorption
spectrometry (AAS) or spectrometry of atomic fluorescence (SFA).
This method determines the total metal content in leather; it is not compound-specific or specific to the
oxidation state of the metals.
The method is applicable for determining the following metals:
Aluminium (Al) Copper (Cu) Potassium (K)
Antimony (Sb) Iron (Fe) Selenium (Se)
Arsenic (As) Lead (Pb) Silicon (Si)
Barium (Ba) Magnesium (Mg) Sodium (Na)
Cadmium (Cd) Manganese (Mn) Tin (Sn)
Calcium (Ca) Mercury (Hg) Titanium (Ti)
Chromium (Cr) (except chromium-tanned leathers) Molybdenum (Mo) Zinc (Zn)
Cobalt (Co) Nickel (Ni) Zirconium (Zr)
This method is also suitable for determining Boron (B) in leather.
[1] [2]
In the case of chromium-tanned leathers, it is often more relevant to use ISO 5398-1 , ISO 5398-2 ,
[3] [4]
ISO 5398-3 or ISO 5398-4 .
Interlaboratory test results and the quantification limits possible with ICP-OES are given in Table A.1
and Table A.2 of Annex A.
For the determination of Al and Ti in leather the extraction procedure given in Annex B shall be used.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 2021 – All rights reserved 1

---------------------- Page: 7 ----------------------
oSIST prEN ISO 17072-2:2021
ISO/DIS 17072-2:2021(E)
IUC 27-2:2021(E)
ISO 4684, Leather — Chemical tests — Determination of volatile matter
ISO 11885, Water quality — Determination of selected elements by inductively coupled plasma optical
emission spectrometry (ICP-OES)
ISO 15586, Water quality — Determination of trace elements using atomic absorption spectrometry with
graphite furnace
ISO 17294-2, Water quality — Application of inductively coupled plasma mass spectrometry (ICP-MS) —
Part 2: Determination of selected elements including uranium isotopes
ISO 17852, Water quality — Determination of mercury — Method using atomic fluorescence spectrometry
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
4 Principle
Digestion of the sample of leather (see ISO 4044) is carried out using a ternary acid mixture or
microwave digestion until complete mineralization is achieved. The residue is re-dissolved with water
and analysed by AAS, ICP or SFA (for mercury).
The results are reported on the dry matter of the leather.
5 Reagents
WARNING — The concentrated acids used in this method are very corrosive and/or oxidising
liquids, which could raise the possibility of fire in the event of contact with ignitable materials
and promote an existing fire considerably, or could decompose explosively with warming. They
might cause acute or chronic health dangers as well. Mo
...