Surface Assisted Laser Desorption Ionization-Mass Spectrometry (SALDI-MS) for Analysis of Polyester Degradation Products |
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Authors: | Nina Aminlashgari Minna Hakkarainen |
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Institution: | (1) Department of Fibre and Polymer Technology, School of Chemical Science and Engineering, KTH Royal Institute of Technology, Stockholm, Sweden; |
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Abstract: | Novel surface assisted laser desorption ionization-mass spectrometry (SALDI-MS) method was developed for rapid analysis of
low molecular mass polyesters and their degradation products by laser desorption ionization-mass spectrometry. Three polycaprolactone
materials were analyzed by the developed method before and after hydrolytic degradation. The signal-to-noise values obtained
by SALDI-MS were 20–100 times higher compared with the ones obtained by using traditional MALDI-MS matrices. A clean background
at low mass range and higher resolution was obtained by SALDI-MS. Different nanoparticle, cationizing agent, and solvent combinations
were evaluated. Halloysite nanoclay and magnesium hydroxide showed the best potential as SALDI surfaces. The SALDI-MS spectrum
of the polyester hydrolysis products was verified by ESI-MS. The developed SALDI-MS method possesses several advantages over
existing methods for similar analyses. |
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