ISO 602:2025
(Main)Coal — Determination of mineral matter
Coal — Determination of mineral matter
This document specifies a method of determining the amount of mineral matter in all types of coal, including brown coals and lignites.
Charbon — Détermination du taux de matières minérales
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International
Standard
ISO 602
Fourth edition
Coal — Determination of
2025-08
mineral matter
Charbon — Détermination du taux de matières minérales
Reference number
© ISO 2025
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: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagents . 1
6 Apparatus . 2
7 Preparation of sample . 3
8 Procedure . 4
9 Expression of results . 5
10 Precision of the method . 5
10.1 Repeatability .5
10.2 Reproducibility .6
11 Test report . 6
Annex A (informative) Example of calculation . 7
Bibliography . 8
iii
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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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.
This document was prepared by Technical Committee ISO/TC 27, Coal and coke, Subcommittee SC 5, Methods
of analysis.
This fourth edition cancels and replaces the third edition (ISO 602:2015), which has been technically revised.
The main changes are as follows:
— the mandatory terms and definitions clause (Clause 3) has been added and subsequent clauses have been
renumbered;
— a vacuum oven has been added to the list of apparatus;
— the test report has been modified.
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
International Standard ISO 602:2025(en)
Coal — Determination of mineral matter
1 Scope
This document specifies a method of determining the amount of mineral matter in all types of coal, including
brown coals and lignites.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminology 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
The following principle applies:
a) partial demineralization of a sample of the coal by treatment with hydrochloric and hydrofluoric acids
under such conditions that the coal substance remains unaffected;
b) recording of the loss in mass of the coal due to the acid treatment and determination of the undissolved
part of the mineral matter by ashing the partially demineralized coal;
c) determination of the iron mass fraction of the ash so that the pyrites present in the extracted coal can
be calculated; and
d) determination of the amount of hydrochloric acid absorbed by the coal substance.
5 Reagents
During the analysis, use only reagents of recognized analytical grade and only distilled water or water of
equivalent purity.
5.1 Hydrochloric acid, ρ 1,18 g/ml.
5.2 Hydrochloric acid, solution, c(HCI) 5 mol/l.
5.3 Hydrofluoric acid, ρ 1,13 g/ml.
WARNING — The reagents are very toxic by inhalation, contact with skin, and if swallowed, cause
severe burns. Keep the container tightly closed in a well-ventilated place. In case of contact with eyes,
rinse immedi
...
FINAL DRAFT
International
Standard
ISO/FDIS 602
ISO/TC 27/SC 5
Coal — Determination of mineral
Secretariat: SA
matter
Voting begins on:
Charbon — Détermination du taux de matières minérales 2025-05-09
Voting terminates on:
2025-07-04
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference number
ISO/FDIS 602:2025(en) © ISO 2025
FINAL DRAFT
ISO/FDIS 602:2025(en)
International
Standard
ISO/FDIS 602
ISO/TC 27/SC 5
Coal — Determination of
Secretariat: SA
mineral matter
Voting begins on:
Charbon — Détermination du taux de matières minérales
Voting terminates on:
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
© ISO 2025
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland Reference number
ISO/FDIS 602:2025(en) © ISO 2025
ii
ISO/FDIS 602:2025(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagents . 1
6 Apparatus . 2
7 Preparation of sample . 3
8 Procedure . 4
9 Expression of results . 4
10 Precision of the method . 5
10.1 Precision . . .5
10.2 Repeatability .5
10.3 Reproducibility . .5
11 Test report . 5
Annex A (informative) Example of calculation . 7
Bibliography . 8
iii
ISO/FDIS 602:2025(en)
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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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.
This document was prepared by Technical Committee ISO/TC 27, Coal and coke, Subcommittee SC 5, Methods
of analysis.
This fourth edition cancels and replaces the third edition (ISO 602:2015), which has been technically revised.
The main changes are as follows:
— the mandatory terms and definitions clause (Clause 3) has been added and subsequent clauses have been
renumbered;
— a vacuum oven has been added to the list of apparatus;
— the test report has been modified.
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
FINAL DRAFT International Standard ISO/FDIS 602:2025(en)
Coal — Determination of mineral matter
1 Scope
This document specifies a method of determining the amount of mineral matter in all types of coal, including
brown coals and lignites.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminology 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
The following principle applies:
a) partial demineralization of a sample of the coal by treatment with hydrochloric and hydrofluoric acids
under such conditions that the coal substance remains unaffected;
b) recording of the loss in mass of the coal due to the acid
...
2025-03-19
ISO/DISFDIS 602:2024(en)
ISO/TC 27/SC 05/WG 08 5
Secretariat: SA
Date: 2025-04-24
Coal — Determination of mineral matter
Charbon — Détermination du taux de matières minérales
FDIS stage
Document type: International Standard
Document subtype:
Document stage: (50) Approval
Document language: E
O:\tools\Innodata\Working files\innodata-rc\Step 300\^2015\March\Week 2\x067724 - ISO_DIS 602 (Ed
3)\C067724e.doc STD Version 2.1c
ISO/DISFDIS 602:20242025(en)
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: + 41 22 749 01 11
Fax: +41 22 749 09 47
EmailE-mail: copyright@iso.org
Website: www.iso.orgwww.iso.org
Published in Switzerland
ii
ISO/DISFDIS 602:20242025(en)
Contents Page
Foreword . iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagents . 1
6 Apparatus . 2
7 Preparation of sample . 3
8 Procedure . 4
9 Expression of results . 4
10 Precision of the method . 6
11 Test report . 6
Annex A (informative) Example of calculation . 7
Bibliography . 8
iii
ISO/DISFDIS 602:20242025(en)
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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent rights
in respect thereof. As of the date of publication of this document, ISO had not received notice of (a) patent(s)
which may be required to implement this document. However, implementers are cautioned that this may not
represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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.
This document was prepared by Technical Committee ISO/TC 27, Coal and coke, Subcommittee SC 5, Methods
of analysis.
This fourth edition cancels and replaces the third edition (ISO 602:2015), which has been technically revised.
The main changes are as follows:
— — the mandatory terms and definitions clause (Clause 3(Clause 3)) has been added and subsequent
clauses have been renumbered;
— — a vacuum oven has been added to the list of apparatus;
— — the test report has been modified.
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
DRAFT INTERNATIONAL STANDARD ISO/DIS 602:2024(en)
Coal — Determination of mineral matter
1 Scope
This document specifies a method of determining the amount of mineral matter in all types of coal, including
brown coals and lignites.
2 Normative references
There are no normative references cited in this document.
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminology 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
The following principle applies:
a) a) partial demineralization of a sample of the coal by treatment with hydrochloric and hydrofluoric acids
under such conditions that the coal substance remains unaffected;
b) b) recording of the loss in mass of the coal due to the acid treatment and determination of the undissolved
part of the mineral matter by ashing the partially demineralized coal;
c) c) determination of the iron content of the ash so that the pyrites present in the extracted coal can be
calculated; and
d) d) determination of the amount of hydrochloric acid absorbed by the coal substance.
5 Reagents
During the analysis, use only reagents of recognized analytical grade and only distilled water or water of
equivalent purity.
5.1 5.1 Hydrochloric acid, ρ 1,18 g/ml.
5.2 5.2 Hydrochloric acid, solution, c(HCI) 5 mol/l.
5.3 5.3 Hydrofluoric acid, ρ 1,13 g/ml.
WARNING — VeryThe reagents are very toxic by inhalation, in contact with skin, and if swallowed,
causes severe burns.
ISO/FDIS 602:2025(en)
Keep the container tightly closed in a well-ventilated place. In case of contact with eyes, rinse immediately
with plenty of water and seek medical advice.
Wear suitable protective clothing and gloves. In case of accident or feeling unwell, seek medical advice
immediately (show the label where possible).
6 Apparatus
All the apparatus listed below shall be resistant to acids, especially hydrofluoric acid. A suitable material is
polyvinyl chloride (PVC).
6.1 6.1 Beaker, of capacity 200 ml, with a cover slip.
6.2 6.2 Thermometer pocket: a tube, sealed at one end, to carry a thermometer.
6.3 6.3 Stirrer.
6.4 6.4 Wash-bottle.
6.5 6.5 Filter, quantitative filter paper with 1 μm aperture and a sintered alumina filter plate, as
shown in Figure 1Figure 1.
ISO/FDIS 602:2025(en)
Key
1 paper filter, connected to the
...
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