Your cart is currently empty!
ISO 23973:2020
ISO 23973:2020 Liquid chromatography at critical conditions (LCCC) – Chemical heterogeneity of polyethylene oxides
CDN $312.00
Description
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.
Edition
1
Published Date
2020-08-17
Status
PUBLISHED
Pages
49
Language
English
Format
Secure PDF
Secure – PDF details
- Save your file locally or view it via a web viewer
- Viewing permissions are restricted exclusively to the purchaser
- Device limits - 3
- Printing – Enabled only to print (1) copy
See more about our Environmental Commitment
Abstract
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.
Previous Editions
Can’t find what you are looking for?
Please contact us at:
Related Documents
-
ISO 11938:2012 Microbeam analysis – Electron probe microanalysis – Methods for elemental-mapping analysis using wavelength-dispersive spectroscopy
CDN $115.00 Add to cart -
ISO 24639:2022 Microbeam analysis – Analytical electron microscopy – Calibration procedure of energy scale for elemental analysis by electron energy loss spectroscopy
CDN $173.00 Add to cart -
ISO 19463:2018 Microbeam analysis – Electron probe microanalyser (EPMA) – Guidelines for performing quality assurance procedures
CDN $273.00 Add to cart -
ISO 1392:1977 Determination of crystallizing point – General method
CDN $76.00 Add to cart
