STN P CEN ISO/TS 23973
| Name: | STN P CEN ISO/TS 23973 |
| Validity: | Valid |
| Number of pages: | 60 |
| Language: |
EN
|
| Paper: | 24,40€ |
| Electronic version |
a) Only read (without ability to print and copy)
21,96€ b) Without ability to print, with ability to copy (printscreen) 24,40€ c) With ability to print and copy (printscreen) 31,72€ |
| Slovak title | Kvapalinová chromatografia pri kritických podmienkach (LCCC). Chemická heterogenita polyetylénoxidov (ISO/TS 23973: 2020) |
| English title | Liquid chromatography at critical conditions (LCCC) - Chemical heterogeneity of polyethylene oxides (ISO/TS 23973:2020) |
| Release Date: | 01. 04. 2022 |
| Date of withdrawal: | |
| ICS: | 71.040.50 |
| Sorting character/National clasification code | 67 3059 |
| Level of incorporation: | idt ISO/TS 23973:2020, idt CEN ISO/TS 23973:2021 |
| Official Journal | 03/22 |
| Amendments | |
| Replaced by: | |
| Repleces: | |
| Note in Official Journal: | Táto predbežná STN je určená na overenie. Pripomienky zasielajte ÚNMS SR najneskôr do 31. 12. 2023. |
| Subject of the standard: | 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. |
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