ISO 24047:2021

Plastics — Polyethylene (PE) and polypropylene (PP) thermoplastics — Determination of metal content by ICP-OES

This document specifies a method for the determination of metal content in polyethylene (PE) and polypropylene (PP) by inductively coupled plasma optical emission spectrometry (ICP-OES). This document is applicable to the determination of the content of magnesium (Mg), aluminium (Al), calcium (Ca), zinc (Zn), chromium (Cr), titanium (Ti), iron (Fe), antimony (Sb), copper (Cu), lead (Pb), cadmium (Cd), etc. This document is not applicable to the determination of mercury (Hg) due to its volatility. This method is suitable for base polymers of PE, PP, PE/PP copolymer and their blends.

Plastiques — Polyéthylène (PE) et polypropylène (PP) — Détermination de la teneur en métal par ICP-OES

General Information

• Status: Published
• Publication Date: 16-Feb-2021
• ICS: 83.080.20 - Thermoplastic materials
• Technical Committee: ISO/TC 61/SC 9 - Thermoplastic materials
• Drafting Committee: ISO/TC 61/SC 9/WG 6 - Polyolefins
• Current Stage: 6060 - International Standard published
• Start Date: 17-Feb-2021
• Due Date: 07-Apr-2022
• Completion Date: 17-Feb-2021

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 24047
First edition
2021-02
Plastics — Polyethylene (PE) and
polypropylene (PP) thermoplastics
— Determination of metal content by
ICP-OES
Plastiques — Polyéthylène (PE) et polypropylène (PP) —
Détermination de la teneur en métal par ICP-OES
Reference number
ISO 24047:2021(E)
©
ISO 2021

---------------------- Page: 1 ----------------------
ISO 24047:2021(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: 2 ----------------------
ISO 24047:2021(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagents . 2
6 Apparatus . 2
7 Sample preparation . 2
7.1 Cleaning glassware . 2
7.2 Preparation of working standard solutions . 3
7.3 Preparation of test solution . 3
8 Procedure. 3
8.1 Instrument set up . 3
8.2 Preparation of calibration curve . 3
8.3 Sample analysis . 4
9 Expression of results . 5
10 Precision . 5
11 Test report . 5
Annex A (informative) Summary of precision data . 6
Bibliography . 9
© ISO 2021 – All rights reserved iii

---------------------- Page: 3 ----------------------
ISO 24047:2021(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 electro
technical 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 61, Plastics, Subcommittee SC 9,
Thermoplastic materials.
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: 4 ----------------------
ISO 24047:2021(E)

Introduction
Metal elements in polyethylene (PE) and polypropylene (PP) can lead to increased ash content and can
impact material mechanical properties. In addition, some elements are also environmentally hazardous.
This document provides a method to determine the metal content in PE and PP and it can serve as a
measure for additive monitoring, quality control and post-reactor studies.
In this document, inductively coupled plasma optical emission spectrometry (ICP-OES) is used to
determine the concentrations of certain elements in PE and PP. The main advantages of ICP-OES over
atomic absorption spectroscopy (AAS) include multi-element measurement capability, longer linear
dynamic range and less condensed phase interferences.
© ISO 2021 – All rights reserved v

---------------------- Page: 5 ----------------------
INTERNATIONAL STANDARD ISO 24047:2021(E)
Plastics — Polyethylene (PE) and polypropylene (PP)
thermoplastics — Determination of metal content by ICP-
OES
WARNING — Persons using this document should be familiar with normal laboratory practice,
if applicable. This document does not purport to address all of the safety concerns, if any,
associated with its use. It is the responsibility of the user to establish appropriate safety and
health practices.
1 Scope
This document specifies a method for the determination of metal content in polyethylene (PE) and
polypropylene (PP) by inductively coupled plasma optical emission spectrometry (ICP-OES).
This document is applicable to the determination of the content of magnesium (Mg), aluminium (Al),
calcium (Ca), zinc (Zn), chromium (Cr), titanium (Ti), iron (Fe), antimony (Sb), copper (Cu), lead (Pb),
cadmium (Cd), etc. This document is not applicable to the determination of mercury (Hg) due to its
volatility.
This method is suitable for base polymers of PE, PP, PE/PP copolymer and their blends.
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 3451-1, Plastics — Determination of ash — Part 1: General methods
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 http:// www .electropedia .org/
4 Principle
PE and PP samples are incinerated and digested. Metal elements within are dissolved in aqueous solution.
The solution is converted into aerosol via a nebulizer, and then injected into argon supported ICP-OES.
At high temperature, the plasma atomizes metal elements in the solution and gives characteristic
optical emission. The intensity of emission is proportional to the concentration of element. The content
of metal elements in the sample is then calculated
...

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 24047
ISO/TC 61/SC 9
Plastics — Polyethylene (PE) and
Secretariat: KATS
polypropylene (PP) thermoplastics
Voting begins on:
2020­11­23 — Determination of metal content by
ICP-OES
Voting terminates on:
2021­01­18
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
ISO/FDIS 24047:2020(E)
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 2020

---------------------- Page: 1 ----------------------
ISO/FDIS 24047:2020(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2020
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
CH­1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved

---------------------- Page: 2 ----------------------
ISO/FDIS 24047:2020(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagents . 2
6 Apparatus . 2
7 Sample preparation . 2
7.1 Cleaning glassware . 2
7.2 Preparation of working standard solutions . 3
7.3 Preparation of test solution . 3
8 Procedure. 3
8.1 Instrument set up . 3
8.2 Preparation of calibration curve . 3
8.3 Sample analysis . 4
9 Expression of results . 5
10 Precision . 5
11 Test report . 5
Annex A (informative) Summary of precision data . 6
Bibliography . 9
© ISO 2020 – All rights reserved iii

---------------------- Page: 3 ----------------------
ISO/FDIS 24047:2020(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 non­governmental, in liaison with ISO, also take part in the work. ISO
collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electro
technical 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 61, Plastics, Subcommittee SC 9,
Thermoplastic materials.
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 2020 – All rights reserved

---------------------- Page: 4 ----------------------
ISO/FDIS 24047:2020(E)

Introduction
Metal elements in polyethylene (PE) and polypropylene (PP) can lead to increased ash content and can
impact material mechanical properties. In addition, some elements are also environmentally hazardous.
This document provides a method to determine the metal content in PE and PP and it can serve as a
measure for additive monitoring, quality control and post-reactor studies.
In this document, inductively coupled plasma optical emission spectrometry (ICP-OES) is used to
determine the concentrations of certain elements in PE and PP. The main advantages of ICP­OES over
atomic absorption spectroscopy (AAS) include multi-element measurement capability, longer linear
dynamic range and less condensed phase interferences.
© ISO 2020 – All rights reserved v

---------------------- Page: 5 ----------------------
FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 24047:2020(E)
Plastics — Polyethylene (PE) and polypropylene (PP)
thermoplastics — Determination of metal content by ICP-
OES
WARNING — Persons using this document should be familiar with normal laboratory practice,
if applicable. This document does not purport to address all of the safety concerns, if any,
associated with its use. It is the responsibility of the user to establish appropriate safety and
health practices.
1 Scope
This document specifies a method for the determination of metal content in polyethylene (PE) and
polypropylene (PP) by inductively coupled plasma optical emission spectrometry (ICP-OES).
This document is applicable to the determination of the content of magnesium (Mg), aluminium (Al),
calcium (Ca), zinc (Zn), chromium (Cr), titanium (Ti), iron (Fe), antimony (Sb), copper (Cu), lead (Pb),
cadmium (Cd), etc. This document is not applicable to the determination of mercury (Hg) due to its
volatility.
This method is suitable for base polymers of PE, PP, PE/PP copolymer and their blends.
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 3451­1, Plastics — Determination of ash — Part 1: General methods
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 http:// www .electropedia .org/
4 Principle
PE and PP samples are incinerated and digested. Metal elements within are dissolved in aqueous solution.
The solution is converted into aerosol via a nebulizer, and then injected into argon supported ICP-OES.
At high temperatu
...