ISO/DTS 4181

Magnesium and magnesium alloys — Determination of strontium — Inductively coupled plasma optical emission spectrometric method

Titre manque

General Information

• Status: Not Published
• ICS: 77.120.20 - Magnesium and magnesium alloys
• Technical Committee: ISO/TC 79/SC 5 - Magnesium and alloys of cast or wrought magnesium
• Drafting Committee: ISO/TC 79/SC 5/WG 4 - Analysis of magnesium and magnesium alloys

Standards Content (Sample)

FINAL
TECHNICAL ISO/DTS
DRAFT
SPECIFICATION 4181
ISO/TC 79/SC 5
Magnesium and magnesium alloys —
Secretariat: SAC
Determination of strontium —
Voting begins on:
2023-07-24 Inductively coupled plasma optical
emission spectrometric method
Voting terminates on:
2023-09-18
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
Reference number
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. © ISO 2023

FINAL
TECHNICAL ISO/DTS
DRAFT
SPECIFICATION 4181
ISO/TC 79/SC 5
Magnesium and magnesium alloys —
Secretariat: SAC
Determination of strontium —
Voting begins on:
Inductively coupled plasma optical
emission spectrometric method
Voting terminates on:
© ISO 2023
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.
RECIPIENTS OF THIS DRAFT ARE INVITED TO
ISO copyright office
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
CP 401 • Ch. de Blandonnet 8
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
CH-1214 Vernier, Geneva
DOCUMENTATION.
Phone: [phone]
IN ADDITION TO THEIR EVALUATION AS
Reference number
Email: [e-mail]
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
Website: www.iso.org
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
Published in Switzerland
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN­
DARDS TO WHICH REFERENCE MAY BE MADE IN
ii
NATIONAL REGULATIONS. © ISO 2023

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagents . 1
6 Apparatus . 2
6.1 Inductively coupled plasma optical emission spectrometer . 2
6.1.1 General . 2
6.1.2 Wavelengths . 2
6.1.3 Limit of detection . 2
6.1.4 Linearity of the calibration curve . 3
7 Sampling and sample preparation . 3
8 Procedure .3
8.1 General . 3
8.2 Test sample . 3
8.3 Determination . 3
8.3.1 Preparation of the test solution for strontium contents between 0,1 %
(mass fraction) and 1,0 % (mass fraction) . 3
8.3.2 Preparation of the calibration solutions for strontium contents between
0,1 % (mass fraction) and 1,0 % (mass fraction) . 3
8.3.3 Preparation of the test solution for strontium contents between 1,0 %
(mass fraction) and 3,5 % (mass fraction) . 4
8.3.4 Preparation of the calibration solutions for strontium contents between
1,0 % (mass fraction) and 3,5 % (mass fraction) . 4
8.4 Adjustment of the apparatus . 4
8.5 Measurement of the calibration solutions . 5
8.6 Calibration curve . 5
8.7 Measurements of the test solution . 5
9 Expression of results . 5
9.1 Method of calculation . 5
9.2 Precision . . . 5
10 Test report . 6
Annex A (normative) Limit of detection .7
Annex B (informative) Information on the precision test . 8
Annex C (informative) Graphical representation of precision data . 9
Bibliography .10
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 non­governmental, 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 79, Light metals and their alloys,
Subcommittee SC 5, Magnesium and alloys of cast or wrought magnesium.
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
Introduction
Magnesium and magnesium alloys are one kind of light metallic materials and show several
advantageous properties, such as low density, high specific stiffness and strength, good damping
capacity, castability, weldability and machinability, etc. Adding a proper amount of strontium to a
magnesium alloy can reduce supercooling and grain growth rate. Thus, the grain size is refined and the
compactness of magnesium alloys is increased.
ISO 16220 and ISO 3116 give the chemical composition of several magnesium alloy products containing
strontium. The contents of strontium are “0,20 % to 0,30 %”, “0,9 % to 1,5 %”, “1,8 % to 2,3 %”, and
“2,1 % to 2,8 %”. In order to cover this range, this document specifies the determination of strontium
from “0,02 % to 3,5 %”.
v
TECHNICAL SPECIFICATION ISO/DTS 4181:2023(E)
Magnesium and magnesium alloys — Determination of
strontium — Inductively coupled plasma optical emission
spectrometric method
1 Scope
This document specifies an inductively coupled plasma optical emission spectrometric method for
the determination of strontium contents between 0,1 % (mass fraction) and 3,5 % (mass fraction) in
magnesium and magnesium alloys.
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 3696, Water for analytical laboratory use — Specification and test methods
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
After dissolution of a test sample with nitric acid and hydrochloric acid, the solution is nebulized
into an inductively coupled plasma optical emission spectrometer and the intensity of the emitted
light from strontium is measured. The concentrations of strontium in the test solutions are
derived from magnesium­based calibration curves.
5 Reagents
During the analysis, use only reagents of recognized analytical grade and only grade 2 water as
specified in ISO 3696, or water of equivalent purity.
5.1 Pure magnesium, purity ≥ 99,99 % (mass fraction), free from strontium.
5.2 Strontium carbonate, purity ≥ 99,99 % (mass fraction).
5.3 Hydrochloric acid, ρ about 1,19 g/ml.
5.4 Nitric acid, ρ about 1,42 g/ml.
---------
...

ISO TC 79/SC 5
Date: 2023-05
ISO/TC 79/SC 5
Secretariat: SAC
Date: 2023-07-10
Magnesium and magnesium alloys -- — Determination of
strontium --— Inductively coupled plasma optical emission
spectrometric method
Magnésium et alliages de magnésium - Détermination du strontium - Méthode
par spectrométrie d'émission atomique avec source à plasma induit

©ISO #### - All rights reserved i

FDIS stage
©ISO #### - All rights reserved 2

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
E-mail: [e-mail]
Website: www.iso.org
Published in Switzerland
©ISO #### - All rights reserved iii

Contents
Foreword . v
Introduction . viii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagents . 1
6 Apparatus . 2
6.1 Inductively coupled plasma optical emission spectrometer . 2
6.1.1 General . 2
6.1.2 Wavelengths . 2
6.1.3 Limit of detection . 2
6.1.4 Linearity of the calibration curve . 3
7 Sampling and sample preparation . 3
8 Procedure . 3
8.1 General . 3
8.2 Test sample . 3
8.3 Determination . 3
8.3.1 Preparation of the test solution for strontium contents between 0,1 % (mass fraction) and 1,0 %
(mass fraction) . 3
8.3.2 Preparation of the calibration solutions for strontium contents between 0,1 % (mass fraction)
and 1,0 % (mass fraction) . 3
8.3.3 Preparation of the test solution for strontium contents between 1,0 % (mass fraction) and 3,5 %
(mass fraction) . 4
8.3.4 Preparation of the calibration solutions for strontium contents between 1,0 % (mass fraction)
and 3,5 % (mass fraction) . 4
8.4 Adjustment of the apparatus . 5
8.5 Measurement of the calibration solutions . 5
8.6 Calibration curve . 5
8.7 Measurements of the test solution . 5
9 Expression of results . 5
9.1 Method of calculation . 5
9.2 Precision . 5
©ISO #### - All rights reserved iv

10 Test report . 6
Annex A (normative) Limit of detection . 7
Annex B (informative) Information on the precision test . 8
Annex C (informative) Graphical representation of precision data . 10
Bibliography . 12

Foreword iv
Introduction v
1 Scope １
2 Normative references １
3 Terms and definitions １
4 Principle １
5 Reagents １
6 Apparatus ２
7 Sampling and sample preparation ３
8 Procedure ３
8.1 General ３
8.2 Test sample ３
8.3 Determination ３
8.3.1 Preparation of the test solution for strontium contents between 0,1 % (mass fraction) and 1,0 %
(mass fraction) ３
8.3.2 Preparation of the calibration solutions for strontium contents between 0,1 % (mass fraction)
and 1,0 % (mass fraction) ４
8.3.3 Preparation of the test solution for strontium contents between 1,0 % (mass fraction) and 3,5 %
(mass fraction) ４
8.3.4 Preparation of the calibration solutions for strontium contents between 1,0 % (mass fraction)
and 3,5 % (mass fraction) ４
8.4 Adjustment of the apparatus ５
8.5 Measurement of the calibration solutions ５
8.6 Calibration curve ５
8.7 Measurements of the test solution ５
9 Expression of results ６
©ISO #### - All rights reserved v

9.1 Method of calculation ６
9.2 Precision ６
10 Test report ６
Annex A (normative) Limit of detection ８
Annex B (informative) Information on the precision test ９
Annex C １０
Bibliography １１
©ISO #### - All rights reserved vi

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 documentsdocument 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).
Field Code Changed
Attention is drawnISO draws attention to the possibility that some of the elementsimplementation of this
document may beinvolve the subjectuse 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. 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’sISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see
www.iso.org/iso/foreword.html.), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 79, Light metals and their alloys,
Subcommittee SC 5, Magnesium and alloys of cast or wrought magnesium.
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.www.iso.org/members.html.
©ISO #### - All rights reserved vii

ISO/WD nnn-nDTS 4181:(E)
Introduction
Magnesium and magnesium alloys are one kind of light metallic materials and show several
advantageous properties, such as low density, high specific stiffness and strength, good damping capacity,
castability, weldability and machinability, etc. Adding a proper amount of strontium to a magnesium alloy
can reduce supercooling and grain growth rate. SoThus, the grain size is refined and the compactness of
magnesium alloys is increased.
ISO 16220 and ISO 3116 give the chemical composition of several magnesium alloy products containing
strontium. The contents of strontium are “0,20 % to 0,30 %”, “0,9 % to 1,5 %”, “1,8 % to 2,3 %”, and
“2,1 % to 2,8 %”. In order to cover this range, the presentthis document specifies the determination of
strontium from “0,02 % to 3,5 %”.
viii © ISO 2023 – All rights reserved

Magnesium and magnesium alloys－ — Determination of
strontium－ — Inductively coupled plasma optical emission
spectrometric method
1 Scope
This document specifies an inductively coupled plasma optical emission spectrometric method for the
determination of strontium contents between 0,1 % (mass fraction) and 3,5 % (mass fraction) in
magnesium and magnesium alloys.
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 3696, Water for analytical laboratory use — Specification and test methods
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminologicalterminology databases for use in standardization at the following
addresses:
— — ISO Online browsing platform: available at https://www.iso.org/obphttps://www.iso.org/obp
— — IEC Electropedia: available at http://www.electropedia.org/https://www.electropedia.org/
4 Principle
After dissolution of a test sample with nitric acid and hydrochloric acid, the solution is nebulized into an
inductively coupled plasma optical emission spectrometer and the intensity of the emitted light from
strontium is measured. The concentrations of strontium in the test solutions are
derived from magnesium -based calibration curves.
5 Reagents
During the analysis, use only reagents of recognized analytical grade and only grade 2 water as specified
in
...