On the use of electrospray ionization and desorption electrospray ionization mass spectrometry for bulk and surface polymer analysis.
2010
Electrospray ionization (ESI) and desorption electrospray ionization (DESI) mass spectrometry were for the first time compared to investigate degradation products resulting from radiolysis of polyurethane (PUR) irradiated using accelerated electrons. First, DESI optimization was performed to obtain the best results in terms of sensitivity for surface polymer analysis. Then, a comparison was performed between DESI-MS and ESI-MS characterization of the degradation products of irradiated PUR with different doses up to 10 MGy. Similar results were obtained despite a lower sensitivity of DESI. Finally, DESI results obtained by direct surface analysis of irradiated PUR films as a function of depth were compared to bulk analysis results obtained by ESI. This comparison shows that degradation products of PUR are very comparable at the surface or within the polymer, confirming the radio-oxidation homogeneity.
Keywords:
- Matrix-assisted laser desorption electrospray ionization
- Extractive electrospray ionization
- Desorption electrospray ionization
- Ambient ionization
- Sample preparation in mass spectrometry
- Direct electron ionization liquid chromatography–mass spectrometry interface
- Electrospray ionization
- Analytical chemistry
- Mass spectrometry
- Chromatography
- Chemistry
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