ISO 10204:2017
(Main)Iron ores — Determination of magnesium — Flame atomic absorption spectrometric method
Iron ores — Determination of magnesium — Flame atomic absorption spectrometric method
ISO 10204:2017 specifies a flame atomic absorption spectrometric method for the determination of the mass fraction of magnesium in iron ores. This method is applicable to mass fractions of magnesium between 0,010 % and 2,00 % in natural iron ores, iron ore concentrates, and agglomerates, including sinter products.
Minerais de fer — Dosage du magnésium — Méthode par spectrométrie d'absorption atomique dans la flamme
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INTERNATIONAL ISO
STANDARD 10204
Fourth edition
2017-07
Iron ores — Determination of
magnesium — Flame atomic
absorption spectrometric method
Minerais de fer — Dosage du magnésium — Méthode par
spectrométrie d’absorption atomique dans la flamme
Reference number
©
ISO 2017
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, 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
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagents . 2
6 Apparatus . 3
7 Sampling and samples . 4
7.1 Laboratory sample . 4
7.2 Preparation of test samples . 4
7.2.1 General. 4
7.2.2 Method specified in ISO 2596 . 4
7.2.3 Method specified in ISO 7764 . 4
8 Procedure. 4
8.1 Number of determinations . 4
8.2 Test portion . 4
8.3 Blank test and check test . 5
8.3.1 Blank test . 5
8.3.2 Check test . 5
8.4 Determination . 5
8.4.1 Decomposition of the test portion . 5
8.4.2 Treatment of the residue . 5
8.4.3 Preparation of the test solution . 6
8.4.4 Adjustment of the atomic absorption spectrometer. 6
8.4.5 Atomic absorption measurements . 7
9 Expression of results . 7
9.1 Calculation of mass fraction of magnesium . 7
9.2 General treatment of results . 7
9.2.1 Repeatability and permissible tolerance . 7
9.2.2 Determination of analytical result . 8
9.2.3 Between-laboratories precision . 8
9.2.4 Check for trueness . 8
9.2.5 Calculation of final result . 9
9.3 Oxide factor . 9
10 Test report .10
Annex A (normative) Flowsheet of the procedure for the acceptance of analytical values for
test samples .11
Annex B (informative) Derivation of repeatability and permissible tolerance formulae .12
Annex C (informative) Precision data obtained by international analytical trials .13
Bibliography .14
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: w w w . i s o .org/ iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 102, Iron ore and direct reduced iron,
Subcommittee SC 2, Chemical analysis.
This fourth edition cancels and replaces the third edition (ISO 10204:2015), of which it constitutes a
minor revision with the following changes:
— in 7.2, reference to ISO 2596 has been incorporated and 7.2 has been rearranged in a more appropriate
layout/format;
— in 8.2, reference to ISO 2596 has been incorporated;
— “predried” has been deleted where it is inappropriate in 8.1, 8.2, and 8.3.2;
— in Table 1, some minor changes have been made;
— in 9.2.4, Formula (7) and relevant descriptions have been modified to harmonize this subclause
across all documents for which ISO/TC 102/SC 2 is responsible.
iv © ISO 2017 – All rights reserved
INTERNATIONAL STANDARD ISO 10204:2017(E)
Iron ores — Determination of magnesium — Flame atomic
absorption spectrometric method
WARNING — This document might involve hazardous materials, operations, and equipment.
This document does not purport to address all of the safety problems associated with its use.
It is the responsibility of the user of this document to establish appropriate health and safety
practices and determine the applicability of any limitations prior to use.
1 Scope
This document specifies a flame atomic absorption spectrometric method for the determination of the
mass fraction of magnesium in iron ores.
This method is applicable to mass fractions of magnesium between 0,010 % and 2,00 % in natural iron
ores, iron ore concentrates, and agglomerates, including sinter products.
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 648, Laboratory glassware — Single-volume pipettes
ISO 1042, Laboratory glassware — One-mark volumetric flasks
ISO 2596, Iron ores — Determination of hygroscopic moisture in analytical samples — Gravimetric, Karl
Fischer and mass-loss methods
ISO 3082, Iron ores — Sampling and sample preparation procedures
ISO 3696, Water for analytical laboratory use — Specification and test methods
ISO 7764, Iron ores — Preparation of predried test samples for chemical analysis
ISO 9516-1:2003, Iron ores — Determination of various elements by X-ray fluorescence spectrometry —
Part 1: Comprehensive procedure
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:
— IEC Electropedia: available at http:// www .electropedia .org/
— ISO Online browsing platform: available at http:// www .iso .org/ obp
4 Principle
The test portion is decomposed by the treatment with hydrochloric acid and a small amount of nitric
acid, and then evaporated to dehydrate silica, followed by dilution and filtration.
The residue is ignited and silica is removed by evaporation with hydrofluoric and sulfuric acids. The
residue is fused with sodium carbonate and the cooled melt is dissolved in the filtrate.
The solution obtained is aspirated into the flame of an atomic absorption spectrometer using an air-
acetylene burner.
The absorbance values obtained for magnesium are compared with those obtained from calibration
solutions.
NOTE A dinitrogen oxide/acetylene flame can be used for the determination, in which case, the sensitivity is
decreased by a factor of about 3.
5 Reagents
During the analysis, use only reagents of recognized analytical grade and only water that complies with
Grade 2 of ISO 3696.
5.1 Sodium carbonate, (Na CO ), anhydrous.
2 3
5.2 Hydrochloric acid, ρ 1,19 g/ml.
5.3 Hydrochloric acid, ρ 1,19 g/ml, diluted 1 + 9.
5.4 Nitric acid, ρ 1,4 g/ml.
5.5 Hydrofluoric acid, ρ 1,13 g/ml, 40 % (mass fraction) or ρ 1,185 g/ml, 48 % (mass fraction).
5.6 Sulfuric acid, ρ 1,84 g/ml, diluted 1 + 1.
5.7 Pure iron, minimum purity 99,9 % (mass fraction), of mass fraction of magnesium less than
0,0002 %.
5.8 Background s
...
INTERNATIONAL ISO
STANDARD 10204
Fourth edition
2017-07
Iron ores — Determination of
magnesium — Flame atomic
absorption spectrometric method
Minerais de fer — Dosage du magnésium — Méthode par
spectrométrie d’absorption atomique dans la flamme
Reference number
©
ISO 2017
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, 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
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagents . 2
6 Apparatus . 3
7 Sampling and samples . 4
7.1 Laboratory sample . 4
7.2 Preparation of test samples . 4
7.2.1 General. 4
7.2.2 Method specified in ISO 2596 . 4
7.2.3 Method specified in ISO 7764 . 4
8 Procedure. 4
8.1 Number of determinations . 4
8.2 Test portion . 4
8.3 Blank test and check test . 5
8.3.1 Blank test . 5
8.3.2 Check test . 5
8.4 Determination . 5
8.4.1 Decomposition of the test portion . 5
8.4.2 Treatment of the residue . 5
8.4.3 Preparation of the test solution . 6
8.4.4 Adjustment of the atomic absorption spectrometer. 6
8.4.5 Atomic absorption measurements . 7
9 Expression of results . 7
9.1 Calculation of mass fraction of magnesium . 7
9.2 General treatment of results . 7
9.2.1 Repeatability and permissible tolerance . 7
9.2.2 Determination of analytical result . 8
9.2.3 Between-laboratories precision . 8
9.2.4 Check for trueness . 8
9.2.5 Calculation of final result . 9
9.3 Oxide factor . 9
10 Test report .10
Annex A (normative) Flowsheet of the procedure for the acceptance of analytical values for
test samples .11
Annex B (informative) Derivation of repeatability and permissible tolerance formulae .12
Annex C (informative) Precision data obtained by international analytical trials .13
Bibliography .14
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: w w w . i s o .org/ iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 102, Iron ore and direct reduced iron,
Subcommittee SC 2, Chemical analysis.
This fourth edition cancels and replaces the third edition (ISO 10204:2015), of which it constitutes a
minor revision with the following changes:
— in 7.2, reference to ISO 2596 has been incorporated and 7.2 has been rearranged in a more appropriate
layout/format;
— in 8.2, reference to ISO 2596 has been incorporated;
— “predried” has been deleted where it is inappropriate in 8.1, 8.2, and 8.3.2;
— in Table 1, some minor changes have been made;
— in 9.2.4, Formula (7) and relevant descriptions have been modified to harmonize this subclause
across all documents for which ISO/TC 102/SC 2 is responsible.
iv © ISO 2017 – All rights reserved
INTERNATIONAL STANDARD ISO 10204:2017(E)
Iron ores — Determination of magnesium — Flame atomic
absorption spectrometric method
WARNING — This document might involve hazardous materials, operations, and equipment.
This document does not purport to address all of the safety problems associated with its use.
It is the responsibility of the user of this document to establish appropriate health and safety
practices and determine the applicability of any limitations prior to use.
1 Scope
This document specifies a flame atomic absorption spectrometric method for the determination of the
mass fraction of magnesium in iron ores.
This method is applicable to mass fractions of magnesium between 0,010 % and 2,00 % in natural iron
ores, iron ore concentrates, and agglomerates, including sinter products.
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 648, Laboratory glassware — Single-volume pipettes
ISO 1042, Laboratory glassware — One-mark volumetric flasks
ISO 2596, Iron ores — Determination of hygroscopic moisture in analytical samples — Gravimetric, Karl
Fischer and mass-loss methods
ISO 3082, Iron ores — Sampling and sample preparation procedures
ISO 3696, Water for analytical laboratory use — Specification and test methods
ISO 7764, Iron ores — Preparation of predried test samples for chemical analysis
ISO 9516-1:2003, Iron ores — Determination of various elements by X-ray fluorescence spectrometry —
Part 1: Comprehensive procedure
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:
— IEC Electropedia: available at http:// www .electropedia .org/
— ISO Online browsing platform: available at http:// www .iso .org/ obp
4 Principle
The test portion is decomposed by the treatment with hydrochloric acid and a small amount of nitric
acid, and then evaporated to dehydrate silica, followed by dilution and filtration.
The residue is ignited and silica is removed by evaporation with hydrofluoric and sulfuric acids. The
residue is fused with sodium carbonate and the cooled melt is dissolved in the filtrate.
The solution obtained is aspirated into the flame of an atomic absorption spectrometer using an air-
acetylene burner.
The absorbance values obtained for magnesium are compared with those obtained from calibration
solutions.
NOTE A dinitrogen oxide/acetylene flame can be used for the determination, in which case, the sensitivity is
decreased by a factor of about 3.
5 Reagents
During the analysis, use only reagents of recognized analytical grade and only water that complies with
Grade 2 of ISO 3696.
5.1 Sodium carbonate, (Na CO ), anhydrous.
2 3
5.2 Hydrochloric acid, ρ 1,19 g/ml.
5.3 Hydrochloric acid, ρ 1,19 g/ml, diluted 1 + 9.
5.4 Nitric acid, ρ 1,4 g/ml.
5.5 Hydrofluoric acid, ρ 1,13 g/ml, 40 % (mass fraction) or ρ 1,185 g/ml, 48 % (mass fraction).
5.6 Sulfuric acid, ρ 1,84 g/ml, diluted 1 + 1.
5.7 Pure iron, minimum purity 99,9 % (mass fraction), of mass fraction of magnesium less than
0,0002 %.
5.8 Background s
...
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