ISO 23028:2019
(Main)Aluminium oxide primarily used for the production of aluminium — Preparation and storage of test samples
Aluminium oxide primarily used for the production of aluminium — Preparation and storage of test samples
This document describes methods for the sample preparation of smelter-grade aluminium oxide. It covers the reduction of a bulk sample between 1 kg and 20 kg to produce a sample that is suitable for chemical and physical analysis. The reduced sample produced will be representative of the initial bulk sample. The bulk sample is considered to be from one source. The methods are suitable for dry, free-flowing aluminium oxide. As the moisture content will influence many physical analyses, the method aims to minimize the exposure of the sample to the atmosphere to avoid water absorption.
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INTERNATIONAL ISO
STANDARD 23028
First edition
2019-07
Aluminium oxide primarily used
for the production of aluminium —
Preparation and storage of test
samples
Reference number
©
ISO 2019
© ISO 2019
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
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 2
5.1 Rotary splitter . 2
5.2 Laboratory top-pan balance . 2
5.3 Sample bottles/containers . 2
5.4 Small rotary splitter . 2
5.5 Brush . 2
5.6 Powder funnel . 2
6 Procedure. 2
6.1 Sample integrity . 2
6.2 Mixing sample . 3
6.3 Division of sample . 3
6.4 Splitting of sample for analysis . 3
6.5 Identification of sample. 3
6.6 Storage and use . . 3
Annex A (informative) Rotary splitter . 5
Annex B (informative) Example of calculation for sample division . 7
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.
This document was prepared by Technical Committee ISO/TC 226, Materials for the production of
primary aluminium.
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 2019 – All rights reserved
INTERNATIONAL STANDARD ISO 23028:2019(E)
Aluminium oxide primarily used for the production of
aluminium — Preparation and storage of test samples
1 Scope
This document describes methods for the sample preparation of smelter-grade aluminium oxide. It
covers the reduction of a bulk sample between 1 kg and 20 kg to produce a sample that is suitable for
chemical and physical analysis. The reduced sample produced will be representative of the initial bulk
sample. The bulk sample is considered to be from one source.
The methods are suitable for dry, free-flowing aluminium oxide.
As the moisture content will influence many physical analyses, the method aims to minimize the
exposure of the sample to the atmosphere to avoid water absorption.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
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 http: //www .electropedia .org/
3.1
increment
quantity of material collected in a single operation of a sample device
3.2
sample preparation
process of preparing the sample for analysis or testing, which may involve air-drying, particle size
reduction, mixing and division, and may be performed in several stages
3.3
sample preparation stage
stage in the sample preparation sequence of operations that may consist of sample drying, reduction in
particle size or mixing, and which culminates in sample
...
INTERNATIONAL ISO
STANDARD 23028
First edition
2019-07
Aluminium oxide primarily used
for the production of aluminium —
Preparation and storage of test
samples
Reference number
©
ISO 2019
© ISO 2019
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
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 2
5.1 Rotary splitter . 2
5.2 Laboratory top-pan balance . 2
5.3 Sample bottles/containers . 2
5.4 Small rotary splitter . 2
5.5 Brush . 2
5.6 Powder funnel . 2
6 Procedure. 2
6.1 Sample integrity . 2
6.2 Mixing sample . 3
6.3 Division of sample . 3
6.4 Splitting of sample for analysis . 3
6.5 Identification of sample. 3
6.6 Storage and use . . 3
Annex A (informative) Rotary splitter . 5
Annex B (informative) Example of calculation for sample division . 7
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.
This document was prepared by Technical Committee ISO/TC 226, Materials for the production of
primary aluminium.
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 2019 – All rights reserved
INTERNATIONAL STANDARD ISO 23028:2019(E)
Aluminium oxide primarily used for the production of
aluminium — Preparation and storage of test samples
1 Scope
This document describes methods for the sample preparation of smelter-grade aluminium oxide. It
covers the reduction of a bulk sample between 1 kg and 20 kg to produce a sample that is suitable for
chemical and physical analysis. The reduced sample produced will be representative of the initial bulk
sample. The bulk sample is considered to be from one source.
The methods are suitable for dry, free-flowing aluminium oxide.
As the moisture content will influence many physical analyses, the method aims to minimize the
exposure of the sample to the atmosphere to avoid water absorption.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
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 http: //www .electropedia .org/
3.1
increment
quantity of material collected in a single operation of a sample device
3.2
sample preparation
process of preparing the sample for analysis or testing, which may involve air-drying, particle size
reduction, mixing and division, and may be performed in several stages
3.3
sample preparation stage
stage in the sample preparation sequence of operations that may consist of sample drying, reduction in
particle size or mixing, and which culminates in sample
...
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