ISO/TS 23973:2020
(Main)Liquid chromatography at critical conditions (LCCC) — Chemical heterogeneity of polyethylene oxides
Liquid chromatography at critical conditions (LCCC) — Chemical heterogeneity of polyethylene oxides
This document establishes a valid method for separation of chemically heterogeneous polyethylene oxide (PEO) mixtures and for the determination the number and content of the chemically heterogeneous species in the overall sample. The method presented in this document serves as a technical guideline and enables laboratories to learn the principle of "critical chromatography" on a validated system. This method presented in this document with its stated system parameters is not applicable for other polymer classes, due to the diversity of the interactions between the polymer/mobile phase/stationary phase and the number of separation systems that are therefore available. The evaluation of the interlaboratory testing has shown that many error sources relate to the technique of liquid chromatography in general. Possible error sources are described in Annex A. Details on the evaluation of the interlaboratory testing are given in Annex B. Elugrams of the participants (excerpts) are given in Annex C. Investigations of the long-term stability of the test mixture are given in Annex D.
Chromatographie liquide aux conditions critiques — Hétérogénéité chimique des oxydes de polyéthylène
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TECHNICAL ISO/TS
SPECIFICATION 23973
First edition
2020-08
Liquid chromatography at critical
conditions (LCCC) — Chemical
heterogeneity of polyethylene oxides
Chromatographie liquide aux conditions critiques — Hétérogénéité
chimique des oxydes de polyéthylène
Reference number
ISO/TS 23973:2020(E)
©
ISO 2020
---------------------- Page: 1 ----------------------
ISO/TS 23973:2020(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
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/TS 23973:2020(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Apparatus . 2
5.1 General . 2
5.2 Eluent supply . 3
5.3 Pump . 3
5.4 Injection system . 4
5.5 Separation columns . 4
5.6 Column temperature control . 5
5.7 Detectors . 5
5.8 Eluent . 5
5.9 Data acquisition . 5
6 Sample preparation . 5
7 Performance of the measurements .
...
TECHNICAL ISO/TS
SPECIFICATION 23973
First edition
Liquid chromatography at critical
conditions (LCCC) — Chemical
heterogenity of polyethylene oxides
Chromatographie liquide aux conditions critiques — Hétérogénéité
chimique des oxydes de polyéthylène
PROOF/ÉPREUVE
Reference number
ISO/TS 23973:2020(E)
©
ISO 2020
---------------------- Page: 1 ----------------------
ISO/TS 23973:2020(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
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 PROOF/ÉPREUVE © ISO 2020 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/TS 23973:2020(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Apparatus . 2
5.1 General . 2
5.2 Eluent supply . 3
5.3 Pump . 3
5.4 Injection system . 4
5.5 Separation columns . 4
5.6 Column temperature control . 5
5.7 Detectors . 5
5.8 Eluent . 5
5.9 Data acquisition . 5
6 Sample preparation . 5
7 Performance of the measurements .
...
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