Analysis of Antioxidants in Polyethylene Using Supercritical Fluid Extraction/Supercritical Fluid Chromatography and Infrared Detection
| Autor: | K. D. Kempfert, D. L. Dalrymple, R. C. Wieboldt |
|---|---|
| Rok vydání: | 1990 |
| Předmět: |
chemistry.chemical_classification
Chromatography Elution 010401 analytical chemistry Extraction (chemistry) Supercritical fluid extraction Analytical chemistry Infrared spectroscopy Polymer Polyethylene 01 natural sciences 0104 chemical sciences 010309 optics chemistry.chemical_compound chemistry 0103 physical sciences Supercritical fluid chromatography Fourier transform infrared spectroscopy Instrumentation Spectroscopy |
| Zdroj: | Applied Spectroscopy. 44:1028-1034 |
| ISSN: | 1943-3530 0003-7028 |
| Popis: | Supercritical fluid extraction using 100% carbon dioxide is able to remove antioxidant additives from flaked polyethylene. SFE appears to be more selective for the lower-range low-MW polymer than Soxhlet-type extraction. This yields a chromatogram with less interference from low-MW polymer peaks in the region where the additive components elute. Infrared detection is able to locate peaks corresponding to distinct types of additives by generating chromatograms from chemically specific regions of the SFC/IR data. Infrared spectra are sufficient for identification of additives and determination of the oxidation state of phosphorus-containing antioxidants. |
| Databáze: | OpenAIRE |
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